Calan

Adults

For use only at bedtime, these delayed-action forms of verapamil are timed to deliver their peak benefits in the morning, when blood pressure tends to spike. The usual starting dose is 180 milligrams of Covera-HS or 200 milligrams of Verelan PM. Your doctor may raise the dose gradually if you need more.

Children

Safety and effectiveness in children under age 18 have not been established.

Older Adults

If you have poor kidneys, the dosage may need to be lowered.

Overdosage

Any medication taken in excess can have serious consequences. If you suspect an overdose, seek medical attention immediately.

An overdose of Calan can cause fluid buildup in the lungs, kidney problems, seizures, dangerously low blood pressure, and life-threatening heart problems such as a slow or irregular heartbeat.

After treatment for an overdose, you should remain under observation in the hospital for at least 48 hours, especially if you have taken the sustained-release form of the drug.