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      News & Perspective Drugs & Diseases CME & Education Academy Video Decision Point
      Drugs & Diseases > Medscape > Rapid Rx Quiz

      Rapid Rx Quiz: Calcium Channel Blockers

      Mary L. Windle, PharmD

      Disclosures

      October 17, 2022

      CCBs with strong CYP3A4 inducers, such as phenytoin, carbamazepine, St John's wort, phenobarbital, rifampin, and rifabutin, significantly reduce nifedipine efficacy. Other contraindications include cardiogenic shock and sensitivity to CCBs.

      Learn more about nifedipine warnings.

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