Hi some advice/reassurance please. I have been on Imatinib for four years. Have episodes of nausea, cramps, mostly in the mornings. Recently have had a bout of food poisoning, followed by dental infection. Was prescribed Penicillin V and last day of course is tomorrow. I have had antibiotics before. Amoxicillin, with no side effects. But since taking the Penicillin V have had loose stools, nausea and stomach ache. Anyone had similar.TIA.