Double-Blind Clinical Trials of Oral Cyclacillin and Ampicillin

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Abstract
A double-blind study was performed to compare the clinical response and the incidence of side effects in 2,581 patients administered ampicillin or cyclacillin for infections of the genitourinary or respiratory tract, infections of the skin and soft tissues, or for otitis media. There was no significant difference in clinical response and bacterial eradication. All side effects, including diarrhea and skin rash, were approximately twice as frequent in patients treated with ampicillin.