Dosing & Uses
Dosage Forms & Strength
levodopa/carbidopa/entacapone
tablet
- 50mg/12.5mg/200mg
- 75mg/18.75mg/200mg
- 100mg/25mg/200mg
- 125mg/31.25mg/200mg
- 150mg/37.5mg/200mg
- 200mg/50mg/200mg
Parkinson Disease
Substitute an equal levodopa dose with Stalevo as patient's dose at transfer
Maintenance: Titrate as necessary
Carbidopa should be 70-100 mg/day; not to exceed 200 mg/day
Not to exceed 8 tablets/day divided q4-8hr while awake
Food increases levodopa absorption
Monitor hepatic, hematopoietic, cardiovascular, renal function
Safety & efficacy not established
Parkinson Disease
Substitute an equal levodopa dose with Stalevo as patient's dose at transfer
Maintenance: Titrate as necessary
Carbidopa should be 70-100 mg/day; not to exceed 200 mg/day
Not to exceed 8 tablets/day divided q4-8hr while awake
Food increases levodopa absorption
Monitor hepatic, hematopoietic, cardiovascular, renal function
Interactions
Interaction Checker
No Results
Contraindicated
Serious - Use Alternative
Significant - Monitor Closely
Minor
Contraindicated (8)
- isocarboxazid
isocarboxazid, levodopa. Mechanism: pharmacodynamic synergism. Contraindicated. Risk of acute hypertensive episode.
entacapone, isocarboxazid. Either increases effects of the other by pharmacodynamic synergism. Contraindicated. Both nonselective MAO inhibitors and entacapone inhibit catecholamine metabolism, leading to increased levels of catecholamines. Potential for dangerously high HR or BP. - lonafarnib
entacapone will increase the level or effect of lonafarnib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Lonafarnib is a sensitive CYP3A4 substrate. Coadministration with strong or moderate CYP3A4 inhibitors is contraindicated.
- phenelzine
phenelzine, levodopa. Mechanism: pharmacodynamic synergism. Contraindicated. Risk of acute hypertensive episode.
- phenelzine
entacapone, phenelzine. Either increases effects of the other by pharmacodynamic synergism. Contraindicated. Both nonselective MAO inhibitors and entacapone inhibit catecholamine metabolism, leading to increased levels of catecholamines. Potential for dangerously high HR or BP.
- procarbazine
procarbazine, levodopa. Mechanism: pharmacodynamic synergism. Contraindicated. Risk of acute hypertensive episode.
- selegiline
selegiline, levodopa. Mechanism: pharmacodynamic synergism. Contraindicated. Risk of acute hypertensive episode. Concomitant therapy with selegiline and carbidopa-levodopa may be associated with severe orthostatic hypotension not attributable to carbidopa-levodopa alone.
- selegiline transdermal
selegiline transdermal, levodopa. Mechanism: pharmacodynamic synergism. Contraindicated. Risk of acute hypertensive episode.
- tranylcypromine
entacapone, tranylcypromine. Either increases effects of the other by pharmacodynamic synergism. Contraindicated. Both nonselective MAO inhibitors and entacapone inhibit catecholamine metabolism, leading to increased levels of catecholamines. Potential for dangerously high HR or BP.
tranylcypromine, levodopa. Mechanism: pharmacodynamic synergism. Contraindicated. Risk of acute hypertensive episode.
Serious - Use Alternative (32)
- amisulpride
amisulpride, levodopa. Either decreases effects of the other by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Avoid use of amisulpride, a dopamine receptor antagonist, with dopamine agonists.
- aripiprazole
aripiprazole decreases effects of levodopa by pharmacodynamic antagonism. Avoid or Use Alternate Drug.
- chlorpromazine
chlorpromazine decreases effects of levodopa by pharmacodynamic antagonism. Avoid or Use Alternate Drug.
- clozapine
clozapine decreases effects of levodopa by pharmacodynamic antagonism. Avoid or Use Alternate Drug.
- desvenlafaxine
levodopa and desvenlafaxine both increase serotonin levels. Avoid or Use Alternate Drug.
- droperidol
droperidol decreases effects of levodopa by pharmacodynamic antagonism. Avoid or Use Alternate Drug.
- elacestrant
entacapone will increase the level or effect of elacestrant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
- fluphenazine
fluphenazine decreases effects of levodopa by pharmacodynamic antagonism. Avoid or Use Alternate Drug.
- haloperidol
haloperidol decreases effects of levodopa by pharmacodynamic antagonism. Avoid or Use Alternate Drug.
- iloperidone
iloperidone decreases effects of levodopa by pharmacodynamic antagonism. Avoid or Use Alternate Drug.
- infigratinib
entacapone will increase the level or effect of infigratinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
- linezolid
linezolid and levodopa both increase serotonin levels. Avoid or Use Alternate Drug. Linezolid may increase serotonin as a result of MAO-A inhibition. If linezolid must be administered, discontinue serotonergic drug immediately and monitor for CNS toxicity. Serotonergic therapy may be resumed 24 hours after last linezolid dose or after 2 weeks of monitoring, whichever comes first.
linezolid, levodopa. Mechanism: pharmacodynamic synergism. Avoid or Use Alternate Drug. Risk of acute hypertensive episode. - loxapine
loxapine decreases effects of levodopa by pharmacodynamic antagonism. Avoid or Use Alternate Drug.
- loxapine inhaled
loxapine inhaled decreases effects of levodopa by pharmacodynamic antagonism. Contraindicated.
- lurbinectedin
entacapone will increase the level or effect of lurbinectedin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
- macimorelin
levodopa, macimorelin. unspecified interaction mechanism. Avoid or Use Alternate Drug. Drugs that may transiently elevate growth hormone (GH) concentrations may impact the accuracy of the macimorelin diagnostic test. Allow sufficient washout time of drugs affecting GH release before administering macimorelin.
- methylene blue
methylene blue and levodopa both increase serotonin levels. Avoid or Use Alternate Drug. Methylene blue may increase serotonin as a result of MAO-A inhibition. If methylene blue must be administered, discontinue serotonergic drug immediately and monitor for CNS toxicity. Serotonergic therapy may be resumed 24 hours after last methylene blue dose or after 2 weeks of monitoring, whichever comes first.
- metoclopramide intranasal
levodopa, metoclopramide intranasal. Either increases effects of the other by Other (see comment). Avoid or Use Alternate Drug. Comment: Avoid use of metoclopramide intranasal or interacting drug, depending on importance of drug to patient.
metoclopramide intranasal, levodopa. dopaminergic effects. Avoid or Use Alternate Drug. Opposing effects of metoclopramide and the interacting drug on dopamine. Potential exacerbation of symptoms (eg, parkinsonian symptoms) or decreased therapeutic effects of metoclopramide.
entacapone, metoclopramide intranasal. Either increases effects of the other by Other (see comment). Avoid or Use Alternate Drug. Comment: Avoid use of metoclopramide intranasal or interacting drug, depending on importance of drug to patient. - olanzapine
olanzapine decreases effects of levodopa by pharmacodynamic antagonism. Avoid or Use Alternate Drug.
- olopatadine intranasal
entacapone and olopatadine intranasal both increase sedation. Avoid or Use Alternate Drug. Coadministration increases risk of CNS depression, which can lead to additive impairment of psychomotor performance and cause daytime impairment.
- olopatadine intranasal
levodopa and olopatadine intranasal both increase sedation. Avoid or Use Alternate Drug. Coadministration increases risk of CNS depression, which can lead to additive impairment of psychomotor performance and cause daytime impairment.
- pacritinib
entacapone will increase the level or effect of pacritinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
- paliperidone
paliperidone decreases effects of levodopa by pharmacodynamic antagonism. Avoid or Use Alternate Drug.
- perphenazine
perphenazine decreases effects of levodopa by pharmacodynamic antagonism. Avoid or Use Alternate Drug.
- pimozide
pimozide decreases effects of levodopa by pharmacodynamic antagonism. Avoid or Use Alternate Drug.
- procarbazine
procarbazine and levodopa both increase serotonin levels. Avoid or Use Alternate Drug.
- prochlorperazine
prochlorperazine decreases effects of levodopa by pharmacodynamic antagonism. Avoid or Use Alternate Drug.
- promethazine
promethazine decreases effects of levodopa by pharmacodynamic antagonism. Avoid or Use Alternate Drug.
- quetiapine
quetiapine decreases effects of levodopa by pharmacodynamic antagonism. Avoid or Use Alternate Drug.
- risperidone
risperidone decreases effects of levodopa by pharmacodynamic antagonism. Avoid or Use Alternate Drug.
- ropeginterferon alfa 2b
ropeginterferon alfa 2b and entacapone both increase Other (see comment). Avoid or Use Alternate Drug. Narcotics, hypnotics or sedatives can produce additive neuropsychiatric side effects. Avoid use and monitor patients receiving the combination for effects of excessive CNS toxicity.
- thioridazine
thioridazine decreases effects of levodopa by pharmacodynamic antagonism. Avoid or Use Alternate Drug.
Monitor Closely (167)
- abobotulinumtoxinA
abobotulinumtoxinA increases effects of levodopa by pharmacodynamic synergism. Use Caution/Monitor. Use of anticholinergic drugs after administration of botulinum toxin-containing products may potentiate systemic anticholinergic effects.
- acebutolol
carbidopa increases effects of acebutolol by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
levodopa increases effects of acebutolol by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent. - aclidinium
aclidinium, levodopa. Other (see comment). Use Caution/Monitor. Comment: Anticholinergic agents may enhance the therapeutic effects of levodopa; however, anticholinergic agents can exacerbate tardive dyskinesia. In high dosage, anticholinergics may decrease the effects of levodopa by delaying its GI absorption. .
- alfuzosin
carbidopa increases effects of alfuzosin by pharmacodynamic synergism. Use Caution/Monitor. Monitor for hypotension.
- amifostine
amifostine, levodopa. Either increases effects of the other by pharmacodynamic synergism. Modify Therapy/Monitor Closely. Coadministration with blood pressure lowering agents may increase the risk and severity of hypotension associated with amifostine. When amifostine is used at chemotherapeutic doses, withhold blood pressure lowering medications for 24 hr prior to amifostine; if blood pressure lowering medication cannot be withheld, do not administer amifostine.
- amiloride
carbidopa increases effects of amiloride by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
levodopa increases effects of amiloride by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent. - amlodipine
levodopa increases effects of amlodipine by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
carbidopa increases effects of amlodipine by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required. - apomorphine
apomorphine and levodopa both increase dopaminergic effects. Use Caution/Monitor. Combination may enhance efficacy. Monitor for hypotension.
- asenapine
carbidopa increases effects of asenapine by pharmacodynamic synergism. Use Caution/Monitor. Monitor for hypotension.
- atenolol
levodopa increases effects of atenolol by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
carbidopa increases effects of atenolol by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required. - atogepant
entacapone will increase the level or effect of atogepant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- benazepril
carbidopa increases effects of benazepril by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
- atropine IV/IM
atropine IV/IM, levodopa. Other (see comment). Use Caution/Monitor. Comment: Anticholinergic agents may enhance the therapeutic effects of levodopa; however, anticholinergic agents can exacerbate tardive dyskinesia. In high dosage, anticholinergics may decrease the effects of levodopa by delaying its GI absorption. .
- benazepril
levodopa increases effects of benazepril by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
benazepril, levodopa. Either increases effects of the other by pharmacodynamic synergism. Use Caution/Monitor. Additive hypotensive effects. - betaxolol
carbidopa increases effects of betaxolol by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
levodopa increases effects of betaxolol by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent. - bisoprolol
levodopa increases effects of bisoprolol by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
carbidopa increases effects of bisoprolol by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required. - bosentan
carbidopa increases effects of bosentan by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
levodopa increases effects of bosentan by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent. - bromocriptine
bromocriptine and levodopa both increase dopaminergic effects. Use Caution/Monitor. Combining drugs may be therapeutic in patients with Parkinsonism and may allow for reduced levodopa doses. Dosages should be carefully titrated during concomitant treatment.
- bumetanide
carbidopa increases effects of bumetanide by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
- bumetanide
levodopa increases effects of bumetanide by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- bupropion
bupropion increases effects of levodopa by pharmacodynamic synergism. Use Caution/Monitor. There is a higher incidence of adverse reactions with concurrent use of bupropion with levodopa. Use small initial dosages and small, gradual dosage increases of bupropion.
- candesartan
levodopa increases effects of candesartan by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- captopril
levodopa increases effects of captopril by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
captopril, levodopa. Either increases effects of the other by pharmacodynamic synergism. Use Caution/Monitor. Both drugs lower blood pressure. Monitor blood pressure.
carbidopa increases effects of captopril by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required. - carbonyl iron
carbonyl iron decreases levels of levodopa by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Oral administration of iron salts should be separated from levodopa by at least 2 hours.
- carvedilol
carbidopa increases effects of carvedilol by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
- carvedilol
levodopa increases effects of carvedilol by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- chlorothiazide
levodopa increases effects of chlorothiazide by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
carbidopa increases effects of chlorothiazide by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required. - chlorthalidone
levodopa increases effects of chlorthalidone by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
carbidopa increases effects of chlorthalidone by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required. - clevidipine
levodopa increases effects of clevidipine by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
carbidopa increases effects of clevidipine by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required. - clonidine
levodopa increases effects of clonidine by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
carbidopa increases effects of clonidine by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required. - cyclizine
cyclizine, levodopa. Other (see comment). Use Caution/Monitor. Comment: Anticholinergic agents may enhance the therapeutic effects of levodopa; however, anticholinergic agents can exacerbate tardive dyskinesia. In high dosage, anticholinergics may decrease the effects of levodopa by delaying its GI absorption. .
- doxazosin
carbidopa increases effects of doxazosin by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
- cyclopenthiazide
levodopa increases effects of cyclopenthiazide by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- daridorexant
entacapone will increase the level or effect of daridorexant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Daridorexant dose should not exceed 25 mg per night when coadministered with moderate CYP3A4 inhibitors.
entacapone and daridorexant both increase sedation. Modify Therapy/Monitor Closely. Coadministration increases risk of CNS depression, which can lead to additive impairment of psychomotor performance and cause daytime impairment.
levodopa and daridorexant both increase sedation. Modify Therapy/Monitor Closely. Coadministration increases risk of CNS depression, which can lead to additive impairment of psychomotor performance and cause daytime impairment. - dicyclomine
dicyclomine, levodopa. Other (see comment). Use Caution/Monitor. Comment: Anticholinergic agents may enhance the therapeutic effects of levodopa; however, anticholinergic agents can exacerbate tardive dyskinesia. In high dosage, anticholinergics may decrease the effects of levodopa by delaying its GI absorption. .
- difelikefalin
difelikefalin and entacapone both increase sedation. Use Caution/Monitor.
- difelikefalin
difelikefalin and levodopa both increase sedation. Use Caution/Monitor.
- dihydroergotamine intranasal
dihydroergotamine intranasal and levodopa both increase serotonin levels. Use Caution/Monitor.
- diltiazem
levodopa increases effects of diltiazem by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- diphenhydramine
diphenhydramine, levodopa. Other (see comment). Use Caution/Monitor. Comment: Anticholinergic agents may enhance the therapeutic effects of levodopa; however, anticholinergic agents can exacerbate tardive dyskinesia. In high dosage, anticholinergics may decrease the effects of levodopa by delaying its GI absorption. .
- dobutamine
entacapone will increase the level or effect of dobutamine by decreasing metabolism. Use Caution/Monitor. Entacapone is a COMT inhibitor. Caution if coadministered with drugs metabolized by COMT. If coadministered, monitor for changes in heart rate, heart rhythm, and blood pressure.
- dopamine
entacapone will increase the level or effect of dopamine by decreasing metabolism. Use Caution/Monitor. Entacapone is a COMT inhibitor. Caution if coadministered with drugs metabolized by COMT. If coadministered, monitor for changes in heart rate, heart rhythm, and blood pressure.
- doxazosin
levodopa increases effects of doxazosin by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- droxidopa
carbidopa decreases effects of droxidopa by decreasing metabolism. Use Caution/Monitor. Carbidopa, a peripheral dopa-decarboxylase inhibitor, could prevent the conversion of droxidopa to norepinephrine; increased droxidopa dose may be required.
- enalapril
carbidopa increases effects of enalapril by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
levodopa increases effects of enalapril by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent. - epinephrine
entacapone will increase the level or effect of epinephrine by decreasing metabolism. Use Caution/Monitor. Entacapone is a COMT inhibitor. Caution if coadministered with drugs metabolized by COMT. If coadministered, monitor for changes in heart rate, heart rhythm, and blood pressure.
- eplerenone
carbidopa increases effects of eplerenone by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
- epinephrine inhaled
entacapone will increase the level or effect of epinephrine inhaled by decreasing metabolism. Use Caution/Monitor. Entacapone is a COMT inhibitor. Caution if coadministered with drugs metabolized by COMT. If coadministered, monitor for changes in heart rate, heart rhythm, and blood pressure.
- epinephrine racemic
entacapone will increase the level or effect of epinephrine racemic by decreasing metabolism. Use Caution/Monitor. Entacapone is a COMT inhibitor. Caution if coadministered with drugs metabolized by COMT. If coadministered, monitor for changes in heart rate, heart rhythm, and blood pressure.
- eplerenone
levodopa increases effects of eplerenone by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- epoprostenol
carbidopa increases effects of epoprostenol by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
levodopa increases effects of epoprostenol by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent. - eprosartan
levodopa increases effects of eprosartan by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- esmolol
carbidopa increases effects of esmolol by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
- esmolol
levodopa increases effects of esmolol by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- ethacrynic acid
carbidopa increases effects of ethacrynic acid by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
levodopa increases effects of ethacrynic acid by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent. - felodipine
carbidopa increases effects of felodipine by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
levodopa increases effects of felodipine by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent. - fenoldopam
levodopa increases effects of fenoldopam by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
carbidopa increases effects of fenoldopam by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required. - ferric maltol
ferric maltol decreases levels of levodopa by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Oral administration of iron salts should be separated from levodopa by at least 2 hours.
- fosinopril
carbidopa increases effects of fosinopril by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
- ferrous fumarate
ferrous fumarate decreases levels of levodopa by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Oral administration of iron salts should be separated from levodopa by at least 2 hours.
- ferrous gluconate
ferrous gluconate decreases levels of levodopa by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
- ferrous sulfate
ferrous sulfate decreases levels of levodopa by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Oral administration of iron salts should be separated from levodopa by at least 2 hours.
- finerenone
entacapone will increase the level or effect of finerenone by affecting hepatic enzyme CYP2E1 metabolism. Modify Therapy/Monitor Closely. Monitor serum potassium during initiation and dosage adjustment of either finererone or moderate CYP3A4 inhibitors. Adjust finererone dosage as needed.
entacapone will increase the level or effect of finerenone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Monitor serum potassium during initiation and dosage adjustment of either finererone or weak CYP3A4 inhibitors. Adjust finererone dosage as needed. - food
food decreases levels of levodopa by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Food with a high protein content may interfere with the absorption of levodopa.
- fosinopril
levodopa increases effects of fosinopril by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- fosphenytoin
fosphenytoin decreases effects of levodopa by unknown mechanism. Use Caution/Monitor.
- furosemide
carbidopa increases effects of furosemide by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
levodopa increases effects of furosemide by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent. - ganaxolone
entacapone and ganaxolone both increase sedation. Use Caution/Monitor.
- guanfacine
carbidopa increases effects of guanfacine by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
- glycopyrrolate
glycopyrrolate, levodopa. Other (see comment). Use Caution/Monitor. Comment: Anticholinergic agents may enhance the therapeutic effects of levodopa; however, anticholinergic agents can exacerbate tardive dyskinesia. In high dosage, anticholinergics may decrease the effects of levodopa by delaying its GI absorption. .
- glycopyrrolate inhaled
glycopyrrolate inhaled, levodopa. Other (see comment). Use Caution/Monitor. Comment: Anticholinergic agents may enhance the therapeutic effects of levodopa; however, anticholinergic agents can exacerbate tardive dyskinesia. In high dosage, anticholinergics may decrease the effects of levodopa by delaying its GI absorption. .
- guanfacine
levodopa increases effects of guanfacine by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- hydralazine
levodopa increases effects of hydralazine by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
carbidopa increases effects of hydralazine by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required. - hydrochlorothiazide
levodopa increases effects of hydrochlorothiazide by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
carbidopa increases effects of hydrochlorothiazide by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required. - hyoscyamine
hyoscyamine, levodopa. Other (see comment). Use Caution/Monitor. Comment: Anticholinergic agents may enhance the therapeutic effects of levodopa; however, anticholinergic agents can exacerbate tardive dyskinesia. In high dosage, anticholinergics may decrease the effects of levodopa by delaying its GI absorption. .
- iloprost
carbidopa increases effects of iloprost by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
- hyoscyamine spray
hyoscyamine spray, levodopa. Other (see comment). Use Caution/Monitor. Comment: Anticholinergic agents may enhance the therapeutic effects of levodopa; however, anticholinergic agents can exacerbate tardive dyskinesia. In high dosage, anticholinergics may decrease the effects of levodopa by delaying its GI absorption. .
- iloprost
levodopa increases effects of iloprost by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- indapamide
carbidopa increases effects of indapamide by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
levodopa increases effects of indapamide by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent. - irbesartan
carbidopa increases effects of irbesartan by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
levodopa increases effects of irbesartan by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent. - iron dextran complex
iron dextran complex decreases levels of levodopa by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Oral administration of iron salts should be separated from levodopa by at least 2 hours.
- isradipine
carbidopa increases effects of isradipine by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
- isavuconazonium sulfate
entacapone will increase the level or effect of isavuconazonium sulfate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- isoproterenol
entacapone will increase the level or effect of isoproterenol by decreasing metabolism. Use Caution/Monitor. Entacapone is a COMT inhibitor. Caution if coadministered with drugs metabolized by COMT. If coadministered, monitor for changes in heart rate, heart rhythm, and blood pressure.
- isradipine
levodopa increases effects of isradipine by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- ketanserin
levodopa increases effects of ketanserin by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- labetalol
carbidopa increases effects of labetalol by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
levodopa increases effects of labetalol by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent. - lefamulin
entacapone will increase the level or effect of lefamulin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Monitor for adverse effects if lefamulin is coadministered with moderate CYP3A inhibitors.
- lisinopril
carbidopa increases effects of lisinopril by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
- levomilnacipran
levomilnacipran and levodopa both increase serotonin levels. Modify Therapy/Monitor Closely.
- lisinopril
levodopa increases effects of lisinopril by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- losartan
levodopa increases effects of losartan by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- lumateperone
entacapone will increase the level or effect of lumateperone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Reduce lumateperone dose to 21 mg/day if coadministered with moderate CYP3A4 inhibitors.
- lurasidone
lurasidone decreases effects of levodopa by pharmacodynamic antagonism. Use Caution/Monitor. Antipsychotics may diminish the therapeutic effect of anti-parkinson's agents; may increase risk of hypotension.
- mavacamten
entacapone will increase the level or effect of mavacamten by affecting hepatic enzyme CYP2C19 metabolism. Modify Therapy/Monitor Closely. Inititiation of weak CYP2C19 inhibitors may require decreased mavacamten dose.
entacapone will increase the level or effect of mavacamten by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Inititiation of moderate CYP3A4 inhibitors may require decreased mavacamten dose. - meclizine
meclizine, levodopa. Other (see comment). Use Caution/Monitor. Comment: Anticholinergic agents may enhance the therapeutic effects of levodopa; however, anticholinergic agents can exacerbate tardive dyskinesia. In high dosage, anticholinergics may decrease the effects of levodopa by delaying its GI absorption. .
- methyclothiazide
carbidopa increases effects of methyclothiazide by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
levodopa increases effects of methyclothiazide by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent. - methyldopa
methyldopa, levodopa. pharmacodynamic synergism. Use Caution/Monitor. Risk of additive hypotensive effects, and risk of toxic CNS effects such as psychosis.
entacapone will increase the level or effect of methyldopa by decreasing metabolism. Use Caution/Monitor. Entacapone is a COMT inhibitor. Caution if coadministered with drugs metabolized by COMT. If coadministered, monitor for changes in heart rate, heart rhythm, and blood pressure. - metolazone
carbidopa increases effects of metolazone by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
- methylphenidate
levodopa, methylphenidate. Either increases effects of the other by pharmacodynamic synergism. Use Caution/Monitor. Potential for additive CNS stimulation.
- metoprolol
carbidopa increases effects of metoprolol by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
- metyrosine
carbidopa increases effects of metyrosine by pharmacodynamic synergism. Use Caution/Monitor. Monitor for hypotension.
- minoxidil
carbidopa increases effects of minoxidil by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
- moexipril
carbidopa increases effects of moexipril by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
- nadolol
carbidopa increases effects of nadolol by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
- nebivolol
carbidopa increases effects of nebivolol by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
- nicardipine
carbidopa increases effects of nicardipine by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
- nifedipine
carbidopa increases effects of nifedipine by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
- nisoldipine
carbidopa increases effects of nisoldipine by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
- norepinephrine
entacapone will increase the level or effect of norepinephrine by decreasing metabolism. Use Caution/Monitor. Entacapone is a COMT inhibitor. Caution if coadministered with drugs metabolized by COMT. If coadministered, monitor for changes in heart rate, heart rhythm, and blood pressure.
- metoclopramide
metoclopramide decreases levels of levodopa by pharmacodynamic antagonism. Use Caution/Monitor. Avoid combination if possible.
- metolazone
levodopa increases effects of metolazone by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- metoprolol
levodopa increases effects of metoprolol by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- midazolam intranasal
midazolam intranasal, levodopa. Either increases toxicity of the other by pharmacodynamic synergism. Modify Therapy/Monitor Closely. Concomitant use of barbiturates, alcohol, or other CNS depressants may increase the risk of hypoventilation, airway obstruction, desaturation, or apnea and may contribute to profound and/or prolonged drug effect.
- minoxidil
levodopa increases effects of minoxidil by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- moexipril
levodopa increases effects of moexipril by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- nadolol
levodopa increases effects of nadolol by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- nebivolol
levodopa increases effects of nebivolol by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- nicardipine
levodopa increases effects of nicardipine by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- nifedipine
levodopa increases effects of nifedipine by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- nisoldipine
levodopa increases effects of nisoldipine by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- oliceridine
entacapone will increase the level or effect of oliceridine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. If concomitant use is necessary, may require less frequent oliceridine dosing. Closely monitor for respiratory depression and sedation and titrate subsequent doses accordingly. If inhibitor is discontinued, consider increase oliceridine dosage until stable drug effects are achieved. Monitor for signs of opioid withdrawal.
- olmesartan
levodopa increases effects of olmesartan by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- onabotulinumtoxinA
onabotulinumtoxinA, levodopa. Other (see comment). Use Caution/Monitor. Comment: Anticholinergic agents may enhance the therapeutic effects of levodopa; however, anticholinergic agents can exacerbate tardive dyskinesia. In high dosage, anticholinergics may decrease the effects of levodopa by delaying its GI absorption. .
- oxybutynin transdermal
oxybutynin transdermal decreases effects of levodopa by pharmacodynamic antagonism. Use Caution/Monitor.
- papaverine
papaverine decreases effects of levodopa by unknown mechanism. Use Caution/Monitor.
- penbutolol
levodopa increases effects of penbutolol by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
carbidopa increases effects of penbutolol by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required. - perindopril
carbidopa increases effects of perindopril by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
levodopa increases effects of perindopril by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent. - phenoxybenzamine
carbidopa increases effects of phenoxybenzamine by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- phentolamine
levodopa increases effects of phentolamine by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- phentolamine
carbidopa increases effects of phentolamine by pharmacodynamic synergism. Use Caution/Monitor. Monitor for hypotension.
- phenytoin
phenytoin decreases effects of levodopa by unknown mechanism. Use Caution/Monitor.
- pindolol
carbidopa increases effects of pindolol by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
levodopa increases effects of pindolol by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent. - polysaccharide iron
polysaccharide iron decreases levels of levodopa by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Oral administration of iron salts should be separated from levodopa by at least 2 hours.
- prazosin
carbidopa increases effects of prazosin by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
- pramipexole
levodopa and pramipexole both increase dopaminergic effects. Use Caution/Monitor.
- prazosin
levodopa increases effects of prazosin by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- propantheline
propantheline, levodopa. Other (see comment). Use Caution/Monitor. Comment: Anticholinergic agents may enhance the therapeutic effects of levodopa; however, anticholinergic agents can exacerbate tardive dyskinesia. In high dosage, anticholinergics may decrease the effects of levodopa by delaying its GI absorption. .
- propranolol
levodopa increases effects of propranolol by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
carbidopa increases effects of propranolol by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required. - pyridoxine
pyridoxine decreases levels of levodopa by increasing metabolism. Use Caution/Monitor.
- quinapril
carbidopa increases effects of quinapril by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
- pyridoxine (Antidote)
pyridoxine (Antidote) decreases levels of levodopa by increasing metabolism. Use Caution/Monitor. Interaction does not occur if carbidopa taken concurrently.
- quinapril
levodopa increases effects of quinapril by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- ramipril
carbidopa increases effects of ramipril by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
levodopa increases effects of ramipril by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent. - rasagiline
rasagiline, levodopa. Mechanism: pharmacodynamic synergism. Modify Therapy/Monitor Closely. Risk of acute hypertensive episode.
- sacubitril/valsartan
carbidopa increases effects of sacubitril/valsartan by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- ropinirole
levodopa and ropinirole both increase dopaminergic effects. Use Caution/Monitor.
- sacubitril/valsartan
levodopa increases effects of sacubitril/valsartan by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- sapropterin
sapropterin, levodopa. Mechanism: unspecified interaction mechanism. Use Caution/Monitor. Case reports of combination causing convulsions, over-stimulation, or irritability.
- selegiline transdermal
selegiline transdermal and levodopa both increase serotonin levels. Modify Therapy/Monitor Closely.
- silodosin
carbidopa increases effects of silodosin by pharmacodynamic synergism. Use Caution/Monitor. Monitor for hypotension.
- solriamfetol
levodopa and solriamfetol both increase sympathetic (adrenergic) effects, including increased blood pressure and heart rate. Use Caution/Monitor.
- sotalol
carbidopa increases effects of sotalol by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
levodopa increases effects of sotalol by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent. - spironolactone
carbidopa increases effects of spironolactone by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
levodopa increases effects of spironolactone by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent. - sumatriptan intranasal
sumatriptan intranasal and levodopa both increase serotonin levels. Use Caution/Monitor.
- terazosin
carbidopa increases effects of terazosin by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
- telmisartan
levodopa increases effects of telmisartan by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- terazosin
levodopa increases effects of terazosin by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- timolol
levodopa increases effects of timolol by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
carbidopa increases effects of timolol by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required. - tiotropium
tiotropium, levodopa. Other (see comment). Use Caution/Monitor. Comment: Anticholinergic agents may enhance the therapeutic effects of levodopa; however, anticholinergic agents can exacerbate tardive dyskinesia. In high dosage, anticholinergics may decrease the effects of levodopa by delaying its GI absorption. .
- torsemide
carbidopa increases effects of torsemide by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
- torsemide
levodopa increases effects of torsemide by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- trandolapril
levodopa increases effects of trandolapril by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
carbidopa increases effects of trandolapril by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required. - treprostinil
levodopa increases effects of treprostinil by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
carbidopa increases effects of treprostinil by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required. - triamterene
levodopa increases effects of triamterene by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
carbidopa increases effects of triamterene by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required. - valsartan
levodopa increases effects of valsartan by pharmacodynamic synergism. Use Caution/Monitor. Consider decreasing dosage of antihypertensive agent.
- verapamil
carbidopa increases effects of verapamil by pharmacodynamic synergism. Use Caution/Monitor. Therapy with carbidopa, given with or without levodopa or carbidopa-levodopa combination products, is started, dosage adjustment of the antihypertensive drug may be required.
Minor (21)
- anticholinergic/sedative combos
anticholinergic/sedative combos, levodopa. Other (see comment). Minor/Significance Unknown. Comment: Anticholinergic agents may enhance the therapeutic effects of levodopa; however, anticholinergic agents can exacerbate tardive dyskinesia. In high dosage, anticholinergics may decrease the effects of levodopa by delaying its GI absorption. .
- atropine
atropine, levodopa. Other (see comment). Minor/Significance Unknown. Comment: Anticholinergic agents may enhance the therapeutic effects of levodopa; however, anticholinergic agents can exacerbate tardive dyskinesia. In high dosage, anticholinergics may decrease the effects of levodopa by delaying its GI absorption. .
- belladonna alkaloids
belladonna alkaloids, levodopa. Other (see comment). Minor/Significance Unknown. Comment: Anticholinergic agents may enhance the therapeutic effects of levodopa; however, anticholinergic agents can exacerbate tardive dyskinesia. In high dosage, anticholinergics may decrease the effects of levodopa by delaying its GI absorption. .
- belladonna and opium
belladonna and opium, levodopa. Other (see comment). Minor/Significance Unknown. Comment: Anticholinergic agents may enhance the therapeutic effects of levodopa; however, anticholinergic agents can exacerbate tardive dyskinesia. In high dosage, anticholinergics may decrease the effects of levodopa by delaying its GI absorption. .
- benztropine
benztropine, levodopa. Other (see comment). Minor/Significance Unknown. Comment: Anticholinergic agents may enhance the therapeutic effects of levodopa; however, anticholinergic agents can exacerbate tardive dyskinesia. In high dosage, anticholinergics may decrease the effects of levodopa by delaying its GI absorption. .
- darifenacin
darifenacin, levodopa. Other (see comment). Minor/Significance Unknown. Comment: Anticholinergic agents may enhance the therapeutic effects of levodopa; however, anticholinergic agents can exacerbate tardive dyskinesia. In high dosage, anticholinergics may decrease the effects of levodopa by delaying its GI absorption. .
- ferric maltol
ferric maltol decreases levels of carbidopa by inhibition of GI absorption. Applies only to oral form of both agents. Minor/Significance Unknown.
- ferrous fumarate
ferrous fumarate decreases levels of carbidopa by inhibition of GI absorption. Applies only to oral form of both agents. Minor/Significance Unknown.
- ferrous gluconate
ferrous gluconate decreases levels of carbidopa by inhibition of GI absorption. Applies only to oral form of both agents. Minor/Significance Unknown.
- ferrous sulfate
ferrous sulfate decreases levels of carbidopa by inhibition of GI absorption. Applies only to oral form of both agents. Minor/Significance Unknown.
- fesoterodine
fesoterodine, levodopa. Other (see comment). Minor/Significance Unknown. Comment: Anticholinergic agents may enhance the therapeutic effects of levodopa; however, anticholinergic agents can exacerbate tardive dyskinesia. In high dosage, anticholinergics may decrease the effects of levodopa by delaying its GI absorption. .
- flavoxate
flavoxate, levodopa. Other (see comment). Minor/Significance Unknown. Comment: Anticholinergic agents may enhance the therapeutic effects of levodopa; however, anticholinergic agents can exacerbate tardive dyskinesia. In high dosage, anticholinergics may decrease the effects of levodopa by delaying its GI absorption. .
- homatropine
homatropine, levodopa. Other (see comment). Minor/Significance Unknown. Comment: Anticholinergic agents may enhance the therapeutic effects of levodopa; however, anticholinergic agents can exacerbate tardive dyskinesia. In high dosage, anticholinergics may decrease the effects of levodopa by delaying its GI absorption. .
- ipratropium
ipratropium, levodopa. Other (see comment). Minor/Significance Unknown. Comment: Anticholinergic agents may enhance the therapeutic effects of levodopa; however, anticholinergic agents can exacerbate tardive dyskinesia. In high dosage, anticholinergics may decrease the effects of levodopa by delaying its GI absorption. .
- iron dextran complex
iron dextran complex decreases levels of carbidopa by inhibition of GI absorption. Applies only to oral form of both agents. Minor/Significance Unknown.
- methscopolamine
methscopolamine, levodopa. Other (see comment). Minor/Significance Unknown. Comment: Anticholinergic agents may enhance the therapeutic effects of levodopa; however, anticholinergic agents can exacerbate tardive dyskinesia. In high dosage, anticholinergics may decrease the effects of levodopa by delaying its GI absorption. .
- oxybutynin
oxybutynin, levodopa. Other (see comment). Minor/Significance Unknown. Comment: Anticholinergic agents may enhance the therapeutic effects of levodopa; however, anticholinergic agents can exacerbate tardive dyskinesia. In high dosage, anticholinergics may decrease the effects of levodopa by delaying its GI absorption. .
- oxybutynin topical
oxybutynin topical, levodopa. Other (see comment). Minor/Significance Unknown. Comment: Anticholinergic agents may enhance the therapeutic effects of levodopa; however, anticholinergic agents can exacerbate tardive dyskinesia. In high dosage, anticholinergics may decrease the effects of levodopa by delaying its GI absorption. .
- oxybutynin transdermal
oxybutynin transdermal, levodopa. Other (see comment). Minor/Significance Unknown. Comment: Anticholinergic agents may enhance the therapeutic effects of levodopa; however, anticholinergic agents can exacerbate tardive dyskinesia. In high dosage, anticholinergics may decrease the effects of levodopa by delaying its GI absorption. .
- polysaccharide iron
polysaccharide iron decreases levels of carbidopa by inhibition of GI absorption. Applies only to oral form of both agents. Minor/Significance Unknown.
- scopolamine
scopolamine, levodopa. Other (see comment). Minor/Significance Unknown. Comment: Anticholinergic agents may enhance the therapeutic effects of levodopa; however, anticholinergic agents can exacerbate tardive dyskinesia. In high dosage, anticholinergics may decrease the effects of levodopa by delaying its GI absorption. .
Adverse Effects
>10%
Entacapone
- Dyskinesia (25%)
- Nausea (14%)
- Diarrhea (10%)
- Hyperkinesia (10%)
- Urine discoloration (10%)
1-10%
Entacapone
- Hypokinesia (9%), dizziness (8%), Fatigue (6%), hallucinations (1-4%), anxiety (2%), somnolence (2%), asthenia (2%), agitation (1%)
- Increased sweating (2%)
- Purpura (2%)
- Abdominal pain (8%), constipation (6%), vomiting (4%), dry mouth (3%), dyspepsia (2%), flatulence (2%), taste perversion (1%), gastritis (1%)
- Back pain (4%)
- Dyspnea (3%)
- Bacterial infection (1%)
Frequency Not Defined
Levodopa/Carbodopa
- Edema
- Agitation, anxiety, ataxia, bruxism, confusion, daytime somnolence decreased attention span, dyskinesia, dystonia, euphoria, insomnia, fainting, fatigue, increased trembling of hands, insouciance, malaise, memory loss, nightmares, nervousness, restlessness, trismus, vivid dreams
- Alopecia, hot flushes, increased &/or dark perspiration, skin eruptions
- Abdominal pain & discomfort, burning feeling in tongue, constipation, diarrhea, dysgeusia, dry mouth, dysphagia, hiccups, meteorism, sialorrhea, nausea, weight loss
- Muscular spasms, muscular cramp
- Hematuria, dark urine, incontinence, priapism, urine retention
- Blurred vision, diplopia, dilated pupil, oculogyric problems
Entacapone
- Postural hypotension
- Insomnia
- Confusion
Warnings
Contradindications
Hypersensitivity
Concurrency with nonselective MAOIs (discontinue 2 weeks before starting treatment)
Narrow angle glaucoma
Undiagnosed skin lesions, history of melanoma
Cautions
Hepatic disease, severe cardiovascular/pulmonary disease, bronchial asthma, renal/endocrine disease, open-angle glaucoma
Age >75 yr
History/active psychoses, history of MI or peptic ulcer
Residual atrial, nodal, ventricular arrhythmias
Risk of uncontrollable sexual, gambling or other urges
May be linked to higher melanoma risk in patient with Parkinson disease
May cause NMS if reduced abruptly or discontinued
Risk of syncope
Risk of developing prostate cancer
Diarrhea may occur and be associated entacapone; may cause weight loss, dehydration, and hypokalemia; if severe, may be a sign of drug-induced microscopic colitis
Pregnancy & Lactation
Pregnancy
There are no adequate data on developmental risk associated with use of drug in pregnant women
Animal data
- In animals, administration of carbidopa-levodopa or entacapone during pregnancy was associated with developmental toxicity, including increased incidences of fetal malformations; estimated background risk of major birth defects and miscarriage in indicated population is unknown
Lactation
Levodopa has been detected in human milk after administration of carbidopa-levodopa; there are no data on presence of entacapone or carbidopa in human milk, effects of levodopa, carbidopa, or entacapone on breastfed infant, or on milk production; however, inhibition of lactation may occur because levodopa decreases secretion of prolactin; carbidopa and entacapone are excreted in rat milk; in lactating rat, oral administration of radiolabeled entacapone resulted in levels of entacapone and/or metabolites in milk up to 2 to 3 times that in plasma;
Consider developmental and health benefits of breastfeeding along with mother’s clinical need for drug and any potential adverse effects on breastfed infant or from underlying maternal condition
Pregnancy Categories
A: Generally acceptable. Controlled studies in pregnant women show no evidence of fetal risk.
B: May be acceptable. Either animal studies show no risk but human studies not available or animal studies showed minor risks and human studies done and showed no risk. C: Use with caution if benefits outweigh risks. Animal studies show risk and human studies not available or neither animal nor human studies done. D: Use in LIFE-THREATENING emergencies when no safer drug available. Positive evidence of human fetal risk. X: Do not use in pregnancy. Risks involved outweigh potential benefits. Safer alternatives exist. NA: Information not available.Pharmacology
Mechanism of Action
Levodopa: Crosses blood-brain barrier & converts to dopamine
Carbidopa: Inhibits decarboxylation or breakdown of peripheral levodopa
Entacapone: Selective & reversible inhibitor of COMT
Pharmacokinetics
Absorption
- levodopa: rapid
- carbidopa: slightly slower than levodopa/entacapone
- entacapone: rapid
Peak plasma time
- levodopa: 0.6-2.4 hr
- carbidopa: 2.5-3.4 hr
- entacapone: 1-1.2 hr
Half Life
- levodopa: 1.7 hr
- carbidopa: 1.6-2 hr
- entacapone: 0.8-1 hr
Protein Bound
- levodopa: 10-30%
- carbidopa: 36%
- entacapone: 98%
Metabolites
- levodopa: dopamine, homovanillic acid
- carbidopa: alpha-methyl-3-methoxy-4-hydroxyphenyl propionic acid & alpha-methyl-3,4-dihydroxyphenylpropionic acid
- entacapone: cis-isomer
Elimination
- levodopa: urine: 80-85%
- carbidopa: 30% unchanged in urine
- entacapone: Urine (10%); feces (90%)
Images
Formulary
Adding plans allows you to compare formulary status to other drugs in the same class.
To view formulary information first create a list of plans. Your list will be saved and can be edited at any time.
Adding plans allows you to:
- View the formulary and any restrictions for each plan.
- Manage and view all your plans together – even plans in different states.
- Compare formulary status to other drugs in the same class.
- Access your plan list on any device – mobile or desktop.
