Comparative Clinical Pharmacology of Amoxicillin and Ampicillin Administered Orally

Overview

Journal Antimicrob Agents Chemother

Publisher American Society for Microbiology

Specialty Pharmacology

Date 1972 Jun 1

PMID 4680813

Citations 38

Authors

C Gordon

C Regamey

W M KIRBY

Affiliations

Soon will be listed here.

Abstract

Ampicillin and amoxicillin (alpha-amino-p-hydroxybenzyl penicillin) were administered orally in 500-mg doses to eight fasting volunteers in a comparative study in which pharmacokinetic techniques were used. The absorption of amoxicillin was significantly better, as demonstrated by a higher mean peak serum concentration of 7.6 mug/ml as compared to 3.2 mug/ml for ampicillin, an average "area under the curve" that was approximately double that of ampicillin, and an 8-hr urinary recovery for amoxicillin of 60% as compared to 34% for ampicillin. Serum half-lives were the same for the two antibiotics, with values of 60.3 (+/-3.3) min for ampicillin and 61.3 (+/-5.6) min for amoxicillin. The latter drug gave measurable concentrations in the blood at 8 hr in all of eight volunteers, as compared to only three of eight with ampicillin.

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