I would think if he talked to his doc about his stomach problems, he/she would know which meds are best for him. Actually, a psychiatrist may be better. A psych may know the side effects of anti-depressants and other anxiety drugs better.
Personally, I can't help. I'm sorry. I have taken Pamelor and Prozac with no lasting stomach problems. I think diarrhea and nausea may be common side effects at first with these types of meds. Good luck!
Anxiety Disorder/Mitral Valve Prolapse
Prozac and Carvedilol