However, erythromycins have not been shown to cause problems in nursing babies. Be sure that any discarded medicine is out of the reach of children. Staphylococci super billig ilosone resistant to erythromycin may emerge during course of therapy. -400 Filmtab, Ery-Tab, EryPed, EryPed 200, EryPed 400, Erythrocin Stearate Filmtab, PCE Dispertab What is Ilosone erythromycin Erythromycin is in group of drugs called macrolide antibiotics. Toxicity Overdose Symptoms of overdose include diarrhea, nausea, stomach cramps, and vomiting. Prolonged or repeated use of erythromycin may result in an overgrowth of non-susceptible bacteria or fungi.