Hi! I took Rhythmol for a number of years. It controlled my pvcs so well that I don't think in all that time I ever had even one! I loved it, no side effects. I had a hospital induction. My current EP wanted me to stop taking it. Some doctors prescribe it, some do not. I think if your heart is healthy it is ok to try. Debbie
First, which arrhythmia do you suffer from? From reading some of your other posts, it sounds like you have a lot of PACs and/or PVCs, but do you have any other arrhythmias, like NSVT, atrial fibrillation, etc?
Roughly, there are 4 classes of antiarrhythmic drugs. Two of them are considered fairly "mild" with a low insidence of side effects; beta blockers (like Atenolol) and calcium channel blockers. They are also known as class 2 and class 4 antiarrhythmic drugs.
The other two classes are considered more risky. Class 1 drugs are sodium channel blockers; flecainide and rythmol are two of them. The "heaviest" antiarrhythmic drugs are class 3, potassium channel blockers, and Amiodarone is the drug with most side effects. Sotalol is a special drug, sorting under class 3 but it is also a beta blocker. Class 3 has QT prolongation as a method of action, it's not a side effect.
The challenge for your doctor is to determine a cause of your arrhythmias. For arrhythmias caused by an irritable heart or too much adrenaline, beta blockers are most commonly used. They are also safe for most of us. Calcium channel blockers are often effective in the treatment of supraventricular arrhythmias, except atrial fibrillation. However, they are often used as rate control in atrial fibrillation, to keep the heart from pumping inappropriately fast. So are beta blockers. They both also lower blood pressure.
Class 1 and 3 are often used if there are changes in the heart that enables the development of an arrhythmia. They prolong certain phases of the cardiac electrical cycle or increase the treshold for developing an arrhythmia. But they may have more or less severe side effects. There are also often "trial and error" on which drug is working best, as the doctors often have difficulty finding the exact cause of an arrhythmia.
An alternative, if your EP thinks it's a good idea, is ablation, to permanently cure the arrhythmia.
They also used Rythmol as a "pocket pill" the last afib episode I had -- I felt okay on it, but it didn't convert me. My doc put me on Norpace. I think Rythmol is one of the lower tier drugs, not as problematic as some. Are you being monitored? I was put on a 30 day monitor a week after I started the Norpace. I was scared too at first, but the Norpace has helped keep me in NSR for the past year and a half. Good luck -- keep us posted.
I took Rythmol SR in an attempt to convert my AFib to NSR, it didn't work.
I think I took 425 mg also twice a day.