Calcium Channel Blocker, Drug Exposure

This medication concept set includes the following ingredients: Amlodipine, Diltiazem, Felodipine, Isradipine, Nicardipine, Nifedipine, Nisoldipine, and Verapamil. It also includes combinations of these ingredients with other antihypertensive medications. This code list was generated by taking the descendants of all the calcium channel blocker ingredients of interest and string matching the concept_name of the ingredient. Meds were expected to be only oral/enteral/IV, not topical, ophthalmic/ocular, or buccal.