I have been on this crazy drug for about 5 months...i am difficulty with my breathing, muscle aches, terriible around ovulation, constipation, cant sleep at night, feeling like a zombie, just feels weird all the time. I thought that i was loosing my mind until 1 day i got on the net to look at side effects for toprol and wowwwwww i found that i am experiecing lots of the same things others are. i went to the e r and they thought i was nuts my dr as well.. he takes me off them and says they dont do any of those things to him. now sitting there i started feeling nutz again wondering maybe it is in my mind until i came back on the net and looked up this.... he took me off completely and put me on cardizem i hope and pray they work for me.. toprol did it for my blood pressure but was killling me to. o dont let me forget the lack of sexx.