DynaCirc CR

Generic name: Isradipine

What is DynaCirc CR?

DynaCirc CR, a type of medication called a calcium channel blocker, is prescribed for the treatment of high blood pressure.

What is the most important information I should know about DynaCirc CR?

You must take DynaCirc CR regularly for it to be effective. Since blood pressure declines gradually, it may be several weeks before you get the full benefit of DynaCirc CR; continue taking it even if you are feeling well. DynaCirc CR does not cure high blood pressure; it works to keep it under control.

In some patients, DynaCirc CR can drop your blood pressure too low and you may feel faint or dizzy. Tell your doctor immediately if you experience these symptoms.

Some patients may experience swelling and fluid retention in the hands and feet while taking DynaCirc CR. Notify your doctor right away to determine if it is a side effect of the medicine or if it is a sign of your worsening condition if you have heart failure.

Do not be concerned if you occasionally notice something resembling a tablet in your stool. It is the empty shell coating that allows the slow release of the medicine for your body to absorb.

Who should not take DynaCirc CR?

If you are sensitive to or have ever had an allergic reaction to DynaCirc CR or any of its ingredients, you should not take this medication. Tell your doctor about any drug reactions you have experienced.

What should I tell my doctor before I take the first dose of DynaCirc CR?

Tell your doctor about all prescription, over-the-counter, and herbal medication you are taking before beginning treatment with DynaCirc CR. Also, talk to your doctor about your complete medical history, especially if you have congestive heart failure or stomach problems involving narrowing of the stomach, or if you are also taking a beta-blocking medication such as propranolol.

What is the usual dosage?

The usual starting dosage is 5 mg once a day, alone or in combination with a thiazide diuretic (water pill). Doses may be increased by 5 mg at 2-4 week intervals up to a maximum daily dose of 20 mg. The dosage will be adjusted to meet your individual needs, depending on your condition and how your body responds to the drug. Do not change the dosage or stop taking your medication without your doctor's approval.

How should I take DynaCirc CR?

Swallow the controlled-release tablet whole, without crushing, dividing or chewing it. Try not to miss any doses. If DynaCirc CR is not taken regularly, your condition may worsen.

What should I avoid while taking DynaCirc CR?

DynaCirc CR may cause your blood pressure levels to go very low and for you to develop dizziness or faintness. It is therefore important for you to become accustomed to the effects of DynaCirc CR before participating in activities that require mental alertness, such as driving.

What are possible food and drug interactions associated with DynaCirc CR?

If DynaCirc CR is taken with certain other drugs, the effects of either could be increased, decreased, or altered. It is especially important to check with your doctor before combining DynaCirc CR with beta-blocking blood pressure drugs such as propranolol or fentanyl.

What are the possible side effects of DynaCirc CR?

Side effects cannot be anticipated. If any develop or change in intensity, inform your doctor as soon as possible. Only your doctor can determine if it is safe for you to continue taking DynaCirc CR.

Side effects may include: chest pain, constipation, dizziness, fluid retention, flushing, headache, pounding heartbeat, fatigue, nausea, rash, stomach discomfort

Can I receive DynaCirc CR if I am pregnant or breastfeeding?

The effects of DynaCirc CR during pregnancy have not been adequately studied. If you are pregnant or plan to become pregnant, consult your doctor immediately. DynaCirc CR may appear in breast milk and could affect a nursing infant. Discuss your options with the doctor before breastfeeding.

What should I do if I miss a dose of DynaCirc CR?

If you miss a dose of DynaCirc CR, skip it. Do not take an extra dose to make up for missed doses.

How should I store DynaCirc CR?

Store at room temperature and protect from light, moisture, and humidity.