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- $Unique_ID{BRK03374}
- $Pretitle{}
- $Title{verapamil}
- $Subject{Calan Searle SR Isoptin Knoll SR Verelan Lederle Antianginal calcium
- channel blocker antihypertensive verapamil angina pectoris chest pain high
- blood pressure blood heart vasodilator muscle vessels}
- $Volume{}
- $Log{}
-
- Copyright (C) 1993 Publications International, Ltd.
-
-
- verapamil
- ------------------------------------------------------------------------------
-
- BRAND NAMES (Manufacturers)
-
- Calan (Searle)
- Calan SR (Searle)
- Isoptin (Knoll)
- Isoptin SR (Knoll)
- verapamil (various manufacturers)
- Verelan (Lederle)
-
- TYPE OF DRUG
-
- Antianginal (calcium channel blocker) and antihypertensive
-
- INGREDIENT
-
- verapamil
-
- DOSAGE FORMS
-
- Tablets (40 mg, 80 mg, and 120 mg)
- Sustained-release tablets (180 mg and 240 mg)
- Sustained-release capsules (120 mg, 180 mg, and 240 mg)
-
- STORAGE
-
- Store at room temperature in a tightly closed container.
-
- USES
-
- Verapamil is used to treat angina pectoris (chest pain) and high blood
- pressure. It belongs to a group of drugs known as calcium channel blockers.
- It is not clearly understood how verapamil works, but it is thought to
- increase the blood supply to the heart. It is also a vasodilator that relaxes
- the muscle tissue of the blood vessels, thereby lowering blood pressure.
-
- TREATMENT
-
- Verapamil can be taken either on an empty stomach or with meals, as
- directed by your doctor or pharmacist. The sustained-release tablets should
- not be crushed or chewed, but swallowed whole.
- If you miss a dose of this medication, take the missed dose as soon as
- possible, unless it is almost time for the next dose. In that case, do not
- take the missed dose at all; just return to your regular dosing schedule. Do
- not double the next dose.
- This medication does not cure high blood pressure, but it will help to
- control the condition as long as you continue to take it.
-
- SIDE EFFECTS
-
- Minor.
-
- Abdominal pain, blurred vision, constipation, dizziness, headache, muscle
- cramps, nausea, sleeplessness, or sweating. These side effects should
- disappear as your body adjusts to the medication.
- To relieve constipation, increase the amount of fiber in your diet (fresh
- fruits and vegetables, salads, bran, and whole-grain breads), and drink more
- water (unless your doctor directs you to do otherwise).
-
- Major.
-
- Tell your doctor about any side effects that are persistent or
- particularly bothersome. IT IS ESPECIALLY IMPORTANT TO TELL YOUR DOCTOR about
- changes in menstruation, confusion, depression, fainting, fatigue, hair loss,
- itching, loss of balance, palpitations, rapid weight gain (three to five
- pounds within a week), shortness of breath, swelling of the hands or feet,
- tremors, or unusual weakness.
-
- INTERACTIONS
-
- This drug interacts with a number of other types of drugs:
- 1. The concurrent use of alcohol, quinidine, or prazosin and verapamil
- can cause a severe drop in blood pressure and result in fainting.
- 2. Beta blockers (acebutolol, atenolol, betaxolol, carteolol, esmolol,
- labetalol, metoprolol, nadolol, penbutolol, pindolol, propranolol, or timolol)
- and digoxin should be used cautiously with verapamil, because side effects to
- the heart may be increased.
- 3. Disopyramide should not be taken within 48 hours of verapamil; the
- combination of these medications could lead to heart failure.
- 4. Cimetidine can decrease the elimination of verapamil from the body,
- which can lead to an increased risk of side effects.
- 5. Sulfinpyrazone and rifampin can increase the elimination of verapamil
- from the body, which can lead to a decrease in its effectiveness.
- 6. Verapamil can cause an increase in the effects of the drug
- theophylline.
- BE SURE TO TELL YOUR DOCTOR about any medications you are currently
- taking.
-
- WARNINGS
-
- * Tell your doctor about unusual or allergic reactions you have had to
- any medications, especially to verapamil.
- * Before starting therapy with this medication, be sure that you inform
- your doctor if you have ever had any type of heart disease, kidney disease,
- liver disease, low blood pressure, or a slowed heartbeat.
- * Your doctor may want you to check your pulse while you are taking this
- drug. If your heart rate drops below 50 beats per minute, contact your
- doctor.
- * Verapamil is not effective for an attack of chest pain that has already
- started; this medication is only effective in preventing attacks from
- occurring.
- * It is extremely important that you do not stop taking this medication
- without first consulting your doctor. Stopping abruptly may lead to a
- worsening of your chest pain. Your doctor may, therefore, want to reduce your
- dosage gradually or have you switch to another similar medication when
- verapamil is discontinued.
- * In order to prevent dizziness or fainting while taking this medication,
- try not to stand for long periods of time, avoid drinking alcoholic beverages,
- and try not to become overheated (avoid exercising strenuously in hot weather,
- and do not take hot baths, showers, and saunas).
- * Be sure to tell your doctor if you are pregnant. Extensive studies in
- pregnant women have not been conducted. Also, be sure to tell your doctor if
- you are breast-feeding an infant. Small amounts of verapamil pass into breast
- milk and may cause unwanted side effects in the nursing infant.
-
- ----------------
-
- The material contained here is "FOR INFORMATION ONLY" and should not replace
- the counsel and advice of your personal physician. Promptly consulting your
- doctor is the best path to a quick and successful resolution of any medical
- problem.
-