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Norpace CR
Norpace CR (disopyramide) is an antiarrhythmic medication used to treat certain types of abnormal heart rhythms, specifically ventricular arrhythmias. The controlled-release formulation allows for sustained release of the medication, providing more consistent therapeutic effects over a longer period.
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Frequently Asked Questions
How quickly does Norpace CR work?
Patients may start to notice improvements in heart rhythm within a few days to weeks of starting treatment.
Can I take Norpace CR with food?
Norpace CR can be taken with or without food, but consistency in how you take it is important.
What should I do if I miss a dose?
If you miss a dose, take it as soon as you remember. If it’s almost time for your next dose, skip the missed dose and continue with your regular schedule. Do not double up.
Is Norpace CR safe during pregnancy?
Norpace CR should be used during pregnancy only if the potential benefits justify the potential risks. Consult your healthcare provider for guidance.
What are the signs of serious side effects to watch for?
Monitor for symptoms of severe allergic reactions, urinary retention, or changes in heart rhythm, and seek immediate medical attention if these occur.
Comprehensive Drug Guide
How Does Norpace CR Work?
Norpace CR works by blocking sodium channels in cardiac muscle cells, which stabilizes the cardiac membrane and reduces the excitability of the heart. This action helps to restore normal heart rhythm and prevent the occurrence of abnormal heartbeats.
Common Dosages
- Controlled-release capsules: Common strengths include 100 mg and 150 mg.
Typical Dosing
- Adults: The initial recommended dosage is usually 100 mg to 150 mg taken orally once daily or as directed by the healthcare provider. Dosage may be adjusted based on patient response and tolerability.
Typical Dosing
FDA Approved Indications
- Treatment of ventricular arrhythmias and other specified arrhythmias in patients who require management.
Who Shouldn't Take Norpace CR?
- Known hypersensitivity to disopyramide or any component of the formulation
- Heart failure, cardiogenic shock, or significant heart block without a functioning pacemaker
Advice From The Pharmacist
- Take Norpace CR exactly as prescribed, and do not alter the dosage without consulting your healthcare provider.
- Regular monitoring of heart function may be necessary to assess the effectiveness of the medication and to adjust dosing as needed.
- Inform your healthcare provider about all medications you are taking to avoid potential interactions.
Side Effects of Norpace CR
Common Side Effects
- Dry mouth
- Constipation
- Urinary retention
- Blurred vision
Uncommon/Severe Side Effects
- Severe allergic reactions (rash, itching, swelling)
- Heart block or worsening of arrhythmias
Risks and Warnings of Norpace CR
- Heart Function: Monitor for signs of worsening heart conditions or new arrhythmias, especially in patients with existing cardiac issues.
- Anticholinergic Effects: Use with caution in patients with glaucoma, prostate enlargement, or urinary retention, as disopyramide can exacerbate these conditions.
Interactions with Norpace CR
Common Drug Interactions
- Other Antiarrhythmics: Use caution when combining with other antiarrhythmic medications due to the potential for additive effects.
- CYP450 Enzyme Inhibitors/Inducers: Discuss your complete medication list with your healthcare provider, as certain drugs may affect disopyramide metabolism.
Alternatives to Norpace CR
- Other Antiarrhythmic Medications: Such as amiodarone, sotalol, or flecainide for similar indications.
- Lifestyle Changes: Including managing stress, diet, and exercise to improve overall heart health.
