I'm a 44 year old male, in good health, non-smoker, reasonable weight, but I was just prescribed Toprol XL
( 50mg, twice per day ) after an electrophysiology study to investigate my recent arrhythmia. I have several concerns; will I have to take this medicine the rest of my life? Will it lose effectiveness over time, forcing me to move on to stronger or different drugs? One of the side effects listed is sexual dysfunction...