ampicillin /am′pəsil″in/ , a semisynthetic penicillin. ▪ INDICATIONS: It is prescribed in the treatment of infections caused by a broad spectrum of sensitive gram-negative and gram-positive organisms. ▪ CONTRAINDICATIONS: Known hypersensitivity to any penicillin prohibits its use. ▪ ADVERSE EFFECTS: Among the most serious adverse reactions are anaphylaxis, nausea, and diarrhea. Fever, rashes, allergic reactions, and suprainfection also may occur.
