Do not take this medicine with any of the following:

-cisapride
-disopyramide
-dofetilide
-grapefruit juice
-hawthorn
-pimozide
-red yeast rice
This medicine may also interact with the following medications:

-barbiturates such as phenobarbital
-cimetidine
-cyclosporine
-lithium
-local anesthetics or general anesthetics
-medicines for heart rhythm problems like amiodarone, digoxin, flecainide, procainamide, quinidine
-medicines for high blood pressure or heart problems
-medicines for seizures like carbamazepine and phenytoin
-rifampin, rifabutin or rifapentine
-theophylline or aminophylline

They need to know if you have any of these conditions:

-Duchenne muscular dystrophy
-heart disease
-irregular heartbeat or rhythm
-liver disease
-low blood pressure
-an unusual or allergic reaction to verapamil, other drugs, foods, dyes or preservatives
-pregnant or trying to get pregnant
-breast-feeding

Visit your health care provider for regular checks on your progress. Check your blood pressure as directed. Ask your health care provider what your blood pressure should be. Also, find out when you should contact him or her.
Do not treat yourself for coughs, colds, or pain while you are using this drug without asking your health care provider for advice. Some drugs may increase your blood pressure.
You may get drowsy or dizzy. Do not drive, use machinery, or do anything that needs mental alertness until you know how this drug affects you. Do not stand up or sit up quickly, especially if you are an older patient. This reduces the risk of dizzy or fainting spells.

Keep out of the reach of children and pets.
Store at room temperature between 20 and 25 degrees C (68 and 77 degrees F). Protect from moisture. Keep the container tightly closed. Avoid exposure to extreme heat. Throw away any unused drug after the expiration date.