How do you use verelan?

As directed. Verelan is a brand of generic verapamil which is a calcium channel blocker used to control high blood pressure (hypertension). It is typically given orally (by mouth) once daily. As always, it's imperative that you take it as directed by your prescribing physician so ask plenty of questions before accepting (new) prescriptions. Ask about potential side effects & drug-drug interactions.