My son has been taking antibiotics for a sinus infection for three weeks and also working out intensely. He is now having a sore stomach and has had it for four days. Any body have any ideas. Paul

My wife has the same problem and I too am looking for answers and relief for her.

My wife has the same problem and I too am looking for answers and relief for her.

What antibiotics is your son taking?

Jon Henri8, I suggest you start your own thread about this. I hope I will be able to help you both.