Propafenone HCL is a Class 1C anti-arrhythmic medicine used to treat an irregular heartbeat and to help maintain a normal heart rhythm in patients without structural heart disease.
Propafenone HCL is sometimes started in the hospital where your dose can be closely checked. It is important to take Propafenone HCL Tablets exactly as prescribed. Do not increase or decrease your dose without your doctor's approval. This medication works best when there is a constant level of the drug in your body. To do this, take each dose exactly 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 become worse when the drug is suddenly stopped.
MISSED DOSE: If you miss a dose, take it as soon as remembered if it is within 4 hours. If you remember later, skip the missed dose and resume your usual dosing schedule. Do not "double-up" the dose to catch up.
Nausea, vomiting, heartburn, gas, loss of appetite, stomach cramps, dizziness, drowsiness, headache, weakness or changes in sleep habits may occur as your body adjusts to the medicine. Other side effects include muscle aches, sweating, dry mouth, tremors and unusual taste in the mouth. If any of these symptoms continue or become bothersome, inform your doctor. Notify your doctor promptly if you develop: chest pain, blurred vision, unusual bleeding or bruising, skin rash, chills. Tell your doctor immediately if any of these unlikely but serious side effects occur: signs of infection (e.g., fever, persistent sore throat), sudden weight gain, swelling of the ankles/feet, trouble breathing, unusually fast/slow/irregular heartbeat. If you notice other effects not listed above, contact your doctor or pharmacist.
Before taking propafenone, tell your doctor or pharmacist if you are allergic to it or if you have any other allergies. This medication should not be used if you have certain medical conditions. Before using this medicine, consult your doctor or pharmacist if you have: asthma, emphysema/bronchitis along with asthma, certain heart problems (e.g., congestive heart failure, cardiogenic shock, heart block or any conduction/sinus node problems, very slow heartbeat), untreated blood mineral imbalance (electrolyte imbalance), very low blood pressure. Before using this medication, tell your doctor or pharmacist your medical history, especially of: kidney or liver problems. If you have an artificial heart pacemaker, propafenone may alter its function (both sensing and pacing). Consult your doctor for more details. If you are scheduled for dental or medical procedures, inform your doctor/dentist you use this medication. Caution is advised when using this drug in the elderly because they may be more sensitive to its effects This medication should be used only when clearly needed during pregnancy. Discuss the risks and benefits with your doctor. This medication passes into breast milk. Consult your doctor before breast-feeding.
If overdose is suspected, contact your local poison control center or emergency room immediately. Symptoms of overdose may include fast or slow heartbeat, decreased sexual ability, seizures, severe dizziness or drowsiness, weakness, fatigue, and metallic taste.
Do not share this medicine with others for whom it was not prescribed. Do not use this medicine for other health conditions. Store at room temperature 77 degrees F (25 degrees C) away from light and moisture . Brief storage between 59 to 86 degrees F (15-30 degrees C) is permitted. Do not store in the bathroom. Keep this medicine out of the reach of children. If using this medicine for an extended period of time, obtain refills before your supply runs out.
The above information is intended to supplement, not substitute for, the expertise and judgment of your physician,pharmacist, or other healthcare professional. It should not be construed to indicate that the use of the product is safe, appropriate, or effective for you. Consult your
healthcare professional before taking the product.
Your healthcare professionals (e.g., doctor or pharmacist) may already be aware of any possible drug interactions and may be monitoring you for it. Do not start, stop or change the dosage of any medicine before checking with them first. Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use, especially of: beta-blockers (e.g., atenolol, metoprolol, propranolol), "blood thinners" (e.g., warfarin), certain HIV protease inhibitors (e.g., lopinavir, ritonavir), cimetidine, digoxin, fluoxetine, local anesthetics, orlistat, rifamycins (e.g., rifampin, rifabutin). Other drugs besides propafenone which may affect the heart rhythm (QTc prolongation in the EKG) include dofetilide, pimozide, procainamide, quinidine, sotalol, and sparfloxacin among others. QTc prolongation can infrequently result in serious, rarely fatal, irregular heartbeats. Consult your doctor or pharmacist for details. Ask for instructions about whether you need to stop any other QTc-prolonging drugs you may be using in order to minimize the risk of this effect. Use of certain medications for irregular heartbeat (Class 1a drugs such as quinidine or procainamide, and Class III drugs such as amiodarone) are generally not recommended. Consult your doctor or pharmacist for more details. Do not start or stop any medicine without doctor or pharmacist approval.