I have very short runs of svt. cardiology says i can stop beta blocker due to side effects. but when i went from 25 to 12.5mg of metoprolol i had more frequent episodes. doing better after 3 weeks. are the more frequent episodes from withdrawal?

This should be discussed with your Cardiologist who knows the source of your problem and other meds your are taking. Everyone is their own experiment when it comes to medications and the Dr who knows you can give you the best advice. My hunch would be Yes the increase in freq may be related to stepping down the BB.

I wouldn't call it a withdrawal symptom but would consider it to be a rebound effect from less beta blockade.. Time will tell if you have to revert to the bigger dose in order to suppress the atrial irritability. Check to see if your metoprolol is the succinate form which is the long acting form. The tartrate form is shorter acting. I prefer the longacting form when preventative effect is desired.