Diltiazem

Let’s talk about diltiazem. In the clinic, it’s one of those workhorse medications you reach for without a second thought for certain patients—hypertension, stable angina, rate control in atrial fibrillation. But when you peel back the layers, there’s a fascinating depth to its pharmacology and a very specific niche it occupies that’s distinct from its cousins, the dihydropyridines like amlodipine or the non-dihydropyridines like verapamil. It sits in this interesting middle ground, a benzothiazepine derivative, with effects on both the vasculature and the cardiac conduction system.