Verapamil: study card

Verapamil — Calcium channel blocker. Study the mechanism, listed uses and warnings from the US label on one sourced card.

Generic name
Verapamil
Class
Calcium channel blocker
Mechanism
Lowers blood pressure by decreasing systemic vascular resistance, usually without reflex tachycardia.
Used for
Hypertension in adults, for the cited extended-release tablets
Common side effects
Constipation; Dizziness; Nausea; Hypotension; Headache
Warnings
Contraindicated with severe left ventricular dysfunction; Contraindicated with systolic blood pressure below 90 mmHg or cardiogenic shock; Sick sinus syndrome or second/third-degree AV block is contraindicated unless a functioning artificial ventricular pacemaker is present
Interactions
CYP3A4 inhibitors (erythromycin, ritonavir); CYP3A4 inducers (rifampin); HMG-CoA reductase inhibitors

Brand questions use only name pairings verified against the linked product source. Unverified pairings are withheld from these questions; the other study content remains available.

Drug class families: Non-dihydropyridine calcium channel blockers

Read the source label ↗

Label date: 20260601 · For learning, not clinical decisions. US label and brand information; always consult the current source.

Source snapshot checked: 2026-10-21. The source document and selected fields were compared. The complete card has not had an independent clinical review.

Pronunciation

Verapamil: ver-AP-a-mil

Pronunciation is shown for the US English generic name.

Body system

Cardiovascular · 47 Drug cards

Compare with related cards

Diltiazem

Same class family: Non-dihydropyridine calcium channel blockers

Mechanism: Therapeutic effects are believed to relate to inhibition of calcium influx in cardiac and vascular smooth muscle; vascular relaxation lowers peripheral resistance and blood pressure.

On both cards: Common side effects — Constipation

Only on the Diltiazem card: Used for — Hypertension; Chronic stable angina · Common side effects — Rhinitis; Pharyngitis; Peripheral edema; Myalgia · Warnings — Sick sinus syndrome is contraindicated unless a functioning ventricular pacemaker is present; Second- or third-degree AV block is contraindicated unless a functioning ventricular pacemaker is present; Systolic blood pressure below 90 mmHg is a contraindication · Interactions — Beta-blockers; Digitalis; CYP3A4 substrates

Bumetanide

Same body system: Cardiovascular

Mechanism: Loop diuretic; inhibits sodium and chloride reabsorption in the ascending limb of the loop of Henle.

On both cards: Common side effects — Dizziness; Nausea; Hypotension; Headache

Only on the Bumetanide card: Used for — Edema associated with congestive heart failure in adults; Edema associated with hepatic disease in adults; Edema associated with renal disease, including nephrotic syndrome, in adults · Common side effects — Muscle cramps · Warnings — Contraindicated in anuria; Hepatic coma, severe electrolyte depletion; Serious skin reactions (SJS/TEN)

Lisinopril

Same body system: Cardiovascular

Mechanism: Inhibits angiotensin-converting enzyme, blocking conversion of angiotensin I to angiotensin II and suppressing the renin-angiotensin-aldosterone system.

On both cards: Common side effects — Dizziness; Hypotension; Headache

Only on the Lisinopril card: Used for — Hypertension in adults and children aged 6 years and older; Adjunctive therapy for heart failure; Reduction of mortality after acute myocardial infarction in hemodynamically stable patients treated within 24 hours · Common side effects — Cough; Chest pain · Warnings — Angioedema; Hyperkalemia; Renal impairment · Interactions — Diuretics; NSAIDs; Lithium

An item counts as shared only when both cards use the same wording. If a card does not list an item, that is not a statement that the effect never occurs.