Norpace CR (Disopyramide)

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Norpace CR Brand
Dosage Quantity & Price
Disopyramide (Generic alternate to Norpace CR) Generic

We don't sell this generic-version medication.

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Norpace CR is a medication used to treat certain types of serious irregular heartbeats, such as sustained ventricular tachycardia. It can be used to restore normal heart rhythm and maintain a regular, steady heartbeat.

Norpace CR is an anti-arrhythmic drug that is used to restore and maintain a regular, steady heartbeat. The active ingredient in Norpace CR is disopyramide phosphate. Disopyramide is in a class of medications called antiarrhythmic medications. It works by blocking certain electrical signals in the heart that can cause an irregular heartbeat.

Use and Dosage

Norpace CR is available as capsules that should be taken by mouth either with or without food, usually twice a day as directed. Take the medication exactly as prescribed, even if you feel fine. The extended-release capsules should be swallowed whole, and not crushed or chewed, to prevent the drug from being released all at once, which can cause side effects. The capsules can be taken with or without food, but some people find taking it with food or milk can help avoid stomach issues.

Dosages may vary depending on the individual and their medical condition and should be determined by a healthcare provider. The usual recommended adult dosage range for Norpace CR is between 400 to 800 mg per day, given in divided doses. However, the recommended dosage for most adults is 600 mg per day, taken in divided doses of 150 mg every 6 hours.

Use Norpace CR regularly to get the most benefit from it, so try to take the medication at the same time each day to help remember. Do not take Norpace CR to treat any heart rhythm disorder that has not been diagnosed by your doctor. If you are unsure about how to take your medication, speak to your healthcare provider or pharmacist.

Side Effects

Common Side Effects of Norpace CR (Disopyramide):

  • Abdominal pain
  • Bloating
  • Blurred vision
  • Constipation
  • Dizziness tiredness
  • Dry mouth
  • Dry nose/eyes/throat
  • Gas
  • Itching
  • Muscle aches or pains
  • Nausea
  • Rash
  • Urination problems (such as difficulty urinating or unusual frequent urge to urinate)

Serious Side Effects of Norpace CR (Disopyramide):

  • Confusion
  • Difficulty breathing
  • Dizziness
  • Fast heart rate
  • Headache
  • Hives
  • Hunger
  • Irritability
  • Jitteriness
  • Lightheadedness
  • Little or no urinating
  • New or worsening irregular heartbeat pattern
  • Painful or difficult urination
  • Rapid weight gain
  • Shortness of breath
  • Weakness
  • Serious eye symptoms such as: sudden vision loss, blurred vision, tunnel vision, eye pain or swelling, or seeing halos around lights
  • Serious heart symptoms such as: fast, irregular, or pounding heartbeats; fluttering in your chest; shortness of breath; and sudden dizziness, lightheadedness, or passing out
  • Severe headache, confusion, slurred speech, arm or leg weakness, trouble walking, loss of coordination, feeling unsteady, very stiff muscles, high fever, profuse sweating, or tremors

Forms and Strength

Norpace CR (Disopyramide) is available in the following forms and strength:

Norpace CR: ER Capsule

  • 100 mg


  • Norpace can cause irregular heartbeats or make existing heartbeats worse. It should be used with caution in patients with heart disease.
  • Disopyramide can cause low blood pressure, which can be dangerous especially in elderly patients or those with low blood volume.
  • Norpace can cause anticholinergic side effects such as blurred vision, dry mouth, urinary retention, and constipation.
  • Disopyramide may interact with other medications, including over-the-counter drugs, supplements, and herbal products, leading to potentially serious side effects. Patients should inform their healthcare provider about all the products they are using.
  • Disopyramide is not recommended for use during pregnancy as it may harm the fetus.
  • Norpace can cause dizziness, lightheadedness, or fainting in some patients. Patients should avoid activities that require alertness until they know how Norpace affects them.
  • Disopyramide can cause stomach upset, nausea, vomiting, or loss of appetite. These side effects can be reduced by taking Norpace with food or milk.
  • Norpace can lead to an increase in the level of certain enzymes in the blood, which could indicate liver damage. Therefore, liver function tests should be performed periodically in patients taking Norpace.
  • Disopyramide should be used with caution in patients with kidney disease, as it can build up in the body and cause potentially harmful effects.
  • Norpace should not be stopped suddenly without consulting a healthcare provider, as abrupt discontinuation can cause serious side effects such as worsening of heart conditions or seizures.

Frequently Asked Questions (FAQ)

Is Norpace CR safe to take during pregnancy?

Norpace CR should only be used during pregnancy if the benefits to the mother outweigh the potential risks to the fetus. Speak with your doctor about the risks and benefits of taking Norpace CR during pregnancy.

How should Norpace CR be stored?

Norpace CR should be stored at room temperature, away from heat, moisture, and light. It should also be kept out of the reach of children and pets.

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

If you miss a dose of Norpace CR, take it as soon as you remember. If it is close to the time of your next dose, skip the missed dose and resume your regular dosing schedule. Do not take a double dose to make up for a missed one.

How long does it take for Norpace CR to start working?

Norpace CR can take several days or weeks to start working. The dosage may need to be adjusted over time to achieve the desired results.


It's important to purchase Norpace CR from verified Canadian pharmacy.

Additional information

Generic name:



ER Capsule



Quantities Available: