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This medication is used to treat irregular heart rhythms (arrhythmias).
- Your doctor may want you to take your pulse each day while you take this medication.
- Learn how to monitor your pulse.
- To evaluate the effectiveness of this medication, your doctor may periodically take a blood sample to measure the amount of the drug in your body.
- Do not allow anyone else to take this medication.
- Store at room temperature between 59 and 86 degrees F (between 15 and 30 degrees C) away from moisture and sunlight.
- Do not store in the bathroom.
- This is best taken with a full glass of water on an empty stomach one hour before or two hours after meals.
- If stomach upset occurs, it may be taken with food.
- Sustained-release tablets and capsules must be swallowed whole.
- Do not crush or chew them.
- This medication works best when there is a constant level of the drug in your body.
- To do this, take each dose as prescribed at evenly spaced intervals throughout the day and night.
- Try to take each dose at the same time each day.
- Do not stop taking this medication without consulting your doctor.
- Some conditions may worsen if the drug is stopped suddenly.
- Blurred vision, dry mouth, constipation, difficulty urinating or dizziness may occur.
- If any of these effects persist or worsen, contact your doctor.
- Inform your doctor if you develop chest pain, rapid heartbeat, confusion, easy bruising or bleeding, rash, or breathing difficulties while taking this medication.
- If you notice other effects not listed above, contact your doctor or pharmacist.
- Tell your doctor your medical history, especially of muscle problems (myasthenia gravis), high blood pressure, glaucoma (or a family history of glaucoma), of heart, liver or kidney diseases, of prostate or urinating problems and of any allergies you may have.
- Because this drug may cause dizziness, use caution performing activities requiring alertness (e.g., driving) and limit alcohol consumption.
- This medication should be used only when clearly needed during pregnancy.
- Discuss the risks and benefits with your doctor.
- Disopyramide is excreted into breast milk.
- Though there have been no reports to date of harm to nursing infants, consult your doctor before breast-feeding.
- If you miss a dose, take as soon as remembered unless the next scheduled dose is within 4 hours.
- If so, skip the missed dose and resume your usual dosing schedule.
- Do not "double-up" the dose to catch up.
- Before you take this drug, tell your doctor of any over-the-counter or prescription drugs you are taking, especially phenobarbital, phenytoin, procainamide, propranolol, quinidine, warfarin, erythromycin and rifampin.
- Do not start or stop any medicine without doctor or pharmacist approval.