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Isoptin SR

Isoptin SR

(verapamil)

Isoptin SR (Verapamil) belongs to the class of medications called calcium channel blockers. The sustained release (SR) form of Isoptin SR (Verapamil) is used for the treatment of mild-to-moderate high blood pressure, when beta-blockers or diuretics (water pills) are not recommended or have caused unacceptable side effects.

Available form

Dosage

24-Hour Release Tablet

120MG, 180MG, 240MG

Buy Isoptin SR Full drug details

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Isoptin SR information

Dosage

Side Effects

Available Form

Contraindications

Precautions

Warnings

For most conditions, the dose of Isoptin SR (Verapamil) for adults is 80 mg to 120 mg taken 3 or 4 times daily with food. This dose may be increased to a maximum of 480 mg daily. When treating specific conditions where the heart muscle is enlarged and preventing the heart from working efficiently, the dose may be increased to 600 mg or 720 mg of Isoptin SR (Verapamil) divided throughout the day.

If you use the sustained-release (SR) tablets, the recommended dose of Isoptin SR (Verapamil) ranges from 180 mg to 480 mg daily with food. The SR tablets are to be taken once daily if the dose is 240 mg or less. Doses over 240 mg daily of the SR tablets should be taken in 2 divided doses (morning and evening) with food. Do not chew or crush the sustained-release tablets. Do not take more than 480 mg daily.

Many things can affect the dose of medication that a person needs, such as body weight, other medical conditions, and other medications. If your doctor has recommended a dose different from the ones listed here, do not change the way that you are taking the medication without consulting your doctor.

It is important to take Isoptin SR (Verapamil) exactly as prescribed by the doctor. If you miss a dose, take it as soon as possible and continue with your regular schedule. If it is almost time for your next dose, skip the missed dose and continue with your regular dosing schedule. Do not take a double dose to make up for a missed one. If you are not sure what to do after missing a dose, contact your doctor or pharmacist for advice.

Store Isoptin SR (Verapamil) at room temperature, protect it from light and moisture, and keep it out of the reach of children.

Do not dispose of medications in wastewater (e.g. down the sink or in the toilet) or in household garbage. Ask your pharmacist how to dispose of medications that are no longer needed or have expired.

Before you begin using a medication, be sure to inform your doctor of any medical conditions or Allergies you may have, any medications you are taking, whether you are pregnant or breast-feeding, and any other significant facts about your health. These factors may affect how you should use Isoptin SR (Verapamil).

Heart failure: Isoptin SR (Verapamil) works partially by reducing the force of the heart’s contractions which can cause the symptoms of heart failure to become worse. If you have heart failure that is not well-corrected, discuss with your doctor how Isoptin SR (Verapamil) may affect your medical condition, how your medical condition may affect the dosing and effectiveness of this medication, and whether any special monitoring is needed.

Kidney function: Kidney Disease or reduced kidney function may cause Isoptin SR (Verapamil) to build up in the body, causing side effects. If you have reduced kidney function or kidney disease, discuss with your doctor how Isoptin SR (Verapamil) may affect your medical condition, how your medical condition may affect the dosing and effectiveness of Isoptin SR (Verapamil), and whether any special monitoring is needed.

Liver function: Liver disease or reduced liver function may cause Isoptin SR (Verapamil) to build up in the body, causing side effects. If you have liver problems, discuss with your doctor how Isoptin SR (Verapamil) may affect your medical condition, how your medical condition may affect the dosing and effectiveness of Isoptin SR (Verapamil), and whether any special monitoring is needed. Your doctor may want to test your liver function regularly with blood tests while you are taking Isoptin SR (Verapamil).

Isoptin SR (Verapamil) may also reduce liver function and can cause liver failure. If you experience symptoms of liver problems such as fatigue, feeling unwell, loss of appetite, nausea, yellowing of the skin or whites of the eyes, dark urine, pale stools, abdominal pain or swelling, and itchy skin, contact your doctor immediately.

Low blood pressure and heart rate: Low blood pressure symptoms of tiredness and weakness with faintness have been reported following single doses and even after some months of treatment with Isoptin SR (Verapamil). Some people may require a reduced dose. Isoptin SR (Verapamil) can cause very low heart rate for some people. Report an abnormally low heart rate (less than 50 beats per minute) or persistent fatigue to your doctor.

Neuromuscular disease: If you have a neuromuscular disease such as Myasthenia Gravis, Lambert-Eaton syndrome, or Duchenne's muscular dystrophy, discuss with your doctor how Isoptin SR (Verapamil) may affect your medical condition, how your medical condition may affect the dosing and effectiveness of this medication, and whether any special monitoring is needed.

Pregnancy: Isoptin SR (Verapamil) reaches the developing baby if it is taken during pregnancy. Isoptin SR (Verapamil) should not be used during pregnancy unless the benefits outweigh the risks. If you become pregnant while taking Isoptin SR (Verapamil), contact your doctor immediately.

Breast-feeding: Isoptin SR (Verapamil) passes into breast milk. If you are a breast-feeding mother and are taking Isoptin SR (Verapamil), it may affect your baby. Talk to your doctor about whether you should continue breast-feeding.

Children: The safety and effectiveness of using Isoptin SR (Verapamil) have not been established for children.

Seniors: Seniors may have a higher risk of side effects with Isoptin SR (Verapamil). Your doctor may recommend lower doses to reduce this risk.

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