Pharmacology Reference

Evidence-based drug information organized by class. Search drugs, mechanisms of action, indications, dosing, and interactions.

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Pharmacology

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Calcium Channel Blocker Non-Dihydropyridine (Non-DHP)

Verapamil

Blocks L-type (slow) Ca²⁺ channels in cardiac and vascular smooth muscle

t½ 6–12 h (IR); 5.5–12 h (SR)

Verapamil is a non-dihydropyridine (non-DHP) L-type calcium channel blocker used primarily for supraventricular arrhythmias, angina, and hypertension.

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