My father is 75 years old. Last November, he had a colonoscopy (no polyps). The prep gave him an upset stomach, which he really hadn't recovered from when a dermatologist placed him on a powerful antibiotic (Levaquin). He experienced many side effects from the Levaquin, so he was placed on another antibiotic for two weeks. He has suffered from gastritis ever since. He has seen several gastroenterologists, and has had an upper endoscopy which showed lesions in the stomach and duodenum. He is currently taking Carafate, Prilosec, and Anaspaz (and he has been taking them for several weeks now). However, he is still having symptoms of pain, nausea, and flatulence. Just yesterday, his doctor put him on Lexapro becaue he is depressed from feeling so bad for so long. He also has a history of kidney stones, and several were seen in his left kidney during a CT scan in December. Could kidney stones be at the root of this problem, with the symptoms merely coincidental with the prep and the antibiotics? Or should he try seeing yet another gastroenterologist? His quality of life has been severely impacted by this. Thank you.