Treats high blood pressure, severe chest pain (angina), and irregular heartbeat (arrhythmia). A lower blood pressure will reduce the risk of stroke and heart attack. This medicine is a calcium channel blocker.
Calan, Calan SR, Covera-HS, Isoptin SR, Verelan, Verelan PMThere may be other brand names for this medicine.
When This Medicine Should Not Be Used
Do not use this medicine if you have had an allergic reaction to verapamil. Do not use this medicine if you have low blood pressure or if you have certain heart problems. Ask your doctor what these heart problems are.
How to Use This Medicine
Long Acting Capsule, Tablet, Long Acting Tablet
- Take your medicine as directed. Your dose may need to be changed several times to find what works best for you.
- It is best to take this medicine with food or milk.
- Swallow the extended-release tablets or extended-release capsules whole. Do not crush, break, or chew them.
- If you take the Verelan® or Verelan® PM extended-release capsule, you may open it and pour the medicine into a small amount of applesauce. Stir this mixture well and swallow it without chewing.
If a dose is missed:
- Take a dose as soon as you remember. If it is almost time for your next dose, wait until then and take a regular dose. Do not take extra medicine to make up for a missed dose.
How to Store and Dispose of This Medicine
- Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light.
- Ask your pharmacist, doctor, or health caregiver about the best way to dispose of any outdated medicine or medicine no longer needed.
- Keep all medicine out of the reach of children. Never share your medicine with anyone.
Drugs and Foods to Avoid
Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.
- Make sure your doctor knows if you are also using other medicine to lower blood pressure (such as atenolol, clonidine, lisinopril, metoprolol, prazosin, propranolol, quinapril, timolol, Accupril®, Catapres®, Cozaar®, Diovan®, Inderal®, Lotrel®, Minipress®, Norvasc®, Timoptic®, Toprol®, or Zestril®), medicine for heart rhythm problems (such as disopyramide, flecainide, quinidine, Norpace®, or Tambocor®), or a diuretic or "water pill" (such as furosemide, hydrochlorothiazide, or Lasix®).
- Tell your doctor if you use aspirin, carbamazepine (Tegretol®), cyclosporine (Gengraf®, Neoral®, Sandimmune®), digoxin (Digitek®, Lanoxin®), erythromycin (Ery-Tab®), lithium (Eskalith®, Lithobid®), phenobarbital (Luminal®), rifampin (Rifadin®, Rifamate®, Rifater®), ritonavir (Norvir®), telithromycin (Ketek®), theophylline (Theo-Dur®), tubocurarine, or vecuronium (Norcuron®). Tell your doctor if you use medicine to lower cholesterol (such as atorvastatin, lovastatin, simvastatin, Lipitor®, or Zocor®) or cancer medicine.
- Do not drink alcohol while you are using this medicine.
- Do not eat grapefruit or drink grapefruit juice while you are using this medicine.
Warnings While Using This Medicine
- Make sure your doctor knows if you are pregnant or breastfeeding, or if you have kidney disease, liver disease, nerve disease, or muscle disease. Tell your doctor about all heart problems that you have, including heart failure, heart block, rhythm problems such as Wolff-Parkinson-White syndrome, heart disease, or hypertrophic cardiomyopathy.
- This medicine may make you dizzy or lightheaded. Do not drive, use machines, or do anything else that could be dangerous until you know how this medicine affects you.
- Check with your doctor right away if you have pain or tenderness in the upper stomach, pale stools, dark urine, loss of appetite, nausea, unusual tiredness or weakness, or yellow eyes or skin. These could be symptoms of a serious liver problem.
- Tell any doctor or dentist who treats you that you use this medicine.
- Your blood pressure may go up if you stop this medicine. High blood pressure usually has no symptoms. Even if you feel well, do not stop using this medicine without asking your doctor.
- Your doctor will do lab tests at regular visits to check on the effects of this medicine. Keep all appointments.
Possible Side Effects While Using This Medicine
Call your doctor right away if you notice any of these side effects:
- Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing
- Chest pain
- Dark-colored urine or pale stools
- Fast, slow, uneven, or pounding heartbeat
- Lightheadedness, dizziness, or fainting
- Nausea, vomiting, loss of appetite, or pain in your upper stomach
- Rapid weight gain and swelling in your legs, feet, or ankles
- Trouble breathing
- Unusual tiredness or weakness
- Yellowing of your skin or the whites of your eyes
If you notice these less serious side effects, talk with your doctor:
- Constipation or upset stomach
If you notice other side effects that you think are caused by this medicine, tell your doctor
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088