A healthcare provider may prescribe Calan^® (verapamil hydrochloride) to treat angina (chest pain), high blood pressure (hypertension), and some irregular heart rhythms (arrhythmias). The medication causes the blood vessels to relax, improving blood flow and making it easier for the heart to pump blood. Calan comes in tablet form and is usually taken three or four times a day. If you forget to take your Calan as scheduled, take your missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and continue with your regular schedule. Do not double your dose of Calan.

 

Most people tolerate Calan well. However, as with any drug, side effects may occur. Some of the common side effects of Calan include dizziness, nausea, and headaches. Currently, both brand-name and generic Calan versions are licensed for sale.