"Having close biological relatives with heart disease can increase your risk of developing this disease. Family health history offers important information to help you and your family members understand health risks and prevent disease.
(Generic versions may still be available.)
Pronestyl Consumer (continued)
Nausea, vomiting, loss of appetite, diarrhea, bitter taste in the mouth, or dizziness may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.
Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication for a longer time may develop serious side effects. Careful monitoring by your doctor may decrease your risk.
Tell your doctor right away if you have any serious side effects, including: signs of liver problems (such as persistent nausea/vomiting, stomach/abdominal pain, yellowing eyes/skin, dark urine), mental/mood changes (such as depression, confusion, unusual thoughts/behavior, hallucinations), new/worsening symptoms of heart failure (such as swelling ankles/feet, trouble breathing, unusual tiredness).
Get medical help right away if you have any very serious side effects, including: severe dizziness, fainting, sudden change in heartbeat (unusually faster/slower/more irregular), chest pain, seizures.
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US -
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
Read the Pronestyl (procainamide) Side Effects Center for a complete guide to possible side effects
PRECAUTIONS: Before taking procainamide, tell your doctor or pharmacist if you are allergic to it; or to local anesthetic drugs (such as procaine); or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: certain irregular heartbeat problems (second- or third-degree atrioventricular block or bundle branch block, unless you have a heart pacemaker), new or recent heart attack, worsening chest pain (angina), low blood pressure, lupus, kidney problems, liver problems, myasthenia gravis, blood/bone marrow problems (such as low red/white blood cells and platelets).
This drug may make you dizzy. Do not drive, use machinery, or do any activity that requires alertness until you are sure you can perform such activities safely. Limit alcoholic beverages.
Procainamide may cause a condition that affects the heart rhythm (QT prolongation). QT prolongation can infrequently result in serious (rarely fatal) fast/irregular heartbeat and other symptoms (such as severe dizziness, fainting) that need medical attention right away.
The risk of QT prolongation may be increased if you have certain medical conditions or are taking other drugs that may cause QT prolongation. Before using procainamide, tell your doctor or pharmacist of all the drugs you take and if you have any of the following conditions: certain heart problems (heart failure, slow heartbeat, QT prolongation in the EKG), family history of certain heart problems (QT prolongation in the EKG, sudden cardiac death).
Low levels of potassium or magnesium in the blood may also increase your risk of QT prolongation. This risk may increase if you use certain drugs (such as diuretics/"water pills") or if you have conditions such as severe sweating, diarrhea, or vomiting. Talk to your doctor about using procainamide safely.
Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).
Older adults may be more sensitive to the side effects of this drug, especially QT prolongation (see above).
During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor.
This medication passes into breast milk in small amounts. Consult your doctor before breast-feeding.
Additional Pronestyl Information
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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