I'm taking 125 mgs. Metoprolol per day. I've been on that dosage...

I'm taking 125 mgs. Metoprolol per day. I've been on that dosage for approximately one year for skipped heart beats (which were very scary). Now I'm hot. Constantly sweating. It's unbearable. I can't stand the heat! The only time I don't sweat is when I'm not moving. I didn't associate it with the Toprol until now. The doctor has been running tests for thyroid, infections, etc. But it doesn't feel like an infection. I'm just HOT. And after reading some of your side-effects, now I'm starting to put it all together. I've been going through some weird sleep problems that I've never in my life experienced. Never had a night I didn't sleep right through the night...until now. So to sum things up: sweating bad, sleep disturbances and slight depression.