Overview
Calan is a prescription drug approved by the Food and Drug Administration (FDA) to treat hypertension, angina, and arrhythmias. Calan may be prescribed off-label to prevent migraines. Calan is also known by its drug name, Verapamil.
Calan is a calcium channel blocker. Calcium channel blockers are believed to work by suppressing the action of serotonin, which constricts blood vessels in the head and lowers pain tolerance.
How do I take it?
Calan is generally taken three or four times a day.
Calan comes in tablet form.
Side effects
The FDA-approved label for Calan lists common side effects including headache, dizziness, fatigue, rash, itching, tingling sensation under the skin, nausea, and constipation.... read more
