Toprol-XL and lightheaded

In 2000 I began to have an intermittent atrial fib for which a cardiologist put me on Toprol XL 50mg 1 x day. It worked for several years although during that time I gained some 70 lbs which I attributed to the fact that I retired and am not getting enough exercise.

Now in the past few months I am having episodes of premature ventricular beats, premature atrial beats, supraventricular tachy, all kinds of garbage heart pattern and frequently feel lightheaded for days at a time and from time to time feel like I am going to faint. Energy level is zero...which I attributed to the weight gain. My chest feels thumpy a lot of the time and I've had the 24hr Holter (which proved the above patterns I mention). Now, a cardiologist wants me to have a 30 day event monitor and echo cardiogram.

After reading the postings on this board, I'm thinking I need to talk to my doctor about Toprol side effects which it appears that I might be developing!

Bless all of you for posting your problems! Perhaps together we can solve our medication problems!!

I am 16 years old, i have ran long distance sine I was 11. I started my peroid when I was 12. In the beginnng of 2006 i didn't have my period for 3 or 4 months. then in april i got it again. but a week later i got it back for three days. the last day was May 2nd of 2006. and i haven't had it since and it's the end of december of this year. i went to the dr. and she took test, told me i was aniemic and and nothng else was the mater really. i took these pills but they didnot help me get my period back....at all! then i went to a dietition and she told me to eat this and that...i gained weight and i even practically stoppe running except maybe 3 times every 2 weeks. adn i still haven't gotten mt period. so my dietition thinks it has nothing to do with my eating and running....but we still do't know for sure. now i am go to a gynacologists.
some other symptoms i have been getting since about march or april:
i was told i have a slow heart rate because i run.
i get dizzy or more like lightheaded
sometimes breathing is a little difficult but i don't really think of that as a symptom...it just feels a little different then i have before all this.
sinc a bout a year or so i have been feeeling a sharp pain in by middle back by my lung sometimes when i lay down or even sleeping. it has woken me up before, too.
i hope all of this helps you so you can help me....please...i want some other people's experience and advice too!!!!
THANK YOU SO MUCH!!!!

I was started on Toprol XL 50 mg 3 weeks ago and am stopping it immediately. I have had 3 trips to the ER with shortness of breath and left sided chest pain. Other symptoms include a 10 pound weight gain, leg/feet swelling, difficulty swallowing, tremendous fatigue, headache, periods of feeling faint/lightheaded, extreme nausea and constipation with abdominal bloating. I have never felt so horrible in my life and will NEVER take this drug again.