Erythromycin Side Effects: I am allergic to penicillin, so was prescribed this for a strep t http://www.medications.com/effect/view/40764 I am allergic to penicillin, so was prescribed this for a strep throat. I've been on it one day now. I can't keep any solid food down - both vomiting, stomach cramps, and diarrhea, but I'm doing okay on a liquid diet. Oh yes, the drug from hell. There should be skull bones on the p Wed, 27 May 2009 09:59:36 -0400 http://www.medications.com/effect/view/40764?item=20131 Oh yes, the drug from hell. There should be skull bones on the packet. http://www.medications.com/effect/view/40764?item=20131