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US Brand Name Calan; Covera; Isoptin; Verelan
Generic Name Verapamil
Other Brand Name CALAPTIN
Manufacturer NICHOLAS
Packing 10
Form Tablet
Strength 80 mg, 240 mg, 120 mg

Available online
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Generic Calan SR comes from the family of drugs popular as calcium-channel blockers. It is a prescribed drug that is used for the treatment of high blood pressure or Hypertension. It works by affecting the quantity of calcium stored in your heart and muscle cells. Such an action relaxes the blood vessels in the patient’s body and reduces the amount of work the heart is supposed to perform.


The medicine is highly recommended for the treatment of chest pain caused due to angina. It also controls heart rate in some conditions. In addition, it may also be prescribed by your doctor to treat certain other problems.

Side effects

Listed below are the common side effects that need medical attention only if they persist for long. • Nausea and feeling of vomiting • constipation • fatigue • headache • sexual dysfunction • facial flushing However, if a patient experiences problems like difficult respiration, dizziness or light headedness, skin rash, swelling of legs and ankles, irregular heartbeat, palpitation, fainting, and swelling of the legs or ankles, then immediate consultation with the doctor is advised.


The medication is supposed to be stored at controlled room temperature that is below 25 degree Centigrade. Keep it away from moisture and direct light.


Verapamil hydrochloride is the active ingredient in the composition of Generic Calan SR.

Important Precautions

Generic Calan is known for influencing thinking or reactions, and hence special attention is required while driving or performing actions that may demand high level of concentration, attention and fast reaction. Do not give jerks to your body while lying or sitting up as that my cause dizziness. Avoid taking alcohol and grapefruit juice as its interaction with Calan may lead to unnecessarily caused dangerous effects.

Dosage and administration

Take the tablets as instructed by your doctor and maintain suggested interval between the doses. The medicine can be taken with food or milk. Do not crush or chew the medicine. Avoid taking grapefruit juice while you are on this medication. Never take double dose at once , even if you miss a dose.


If you think you have taken an overdose, then contact your doctor immediately or call the emergency medical assistance.