Absorption of ampicillin and nalidixic acid by infants and children with acute shigellosis

John D. Nelson, Sharon Shelton, Helen T. Kusmiesz, Kenneth C. Haltalin

Research output: Contribution to journalArticlepeer-review

34 Scopus citations


Thirty-seven infants and children with acute shigellosis were treated with orally administered ampicillin or nalidixic acid. Peak plasma levels and dose-response curves suggested two patient populations. Five of 16 patients receiving nalidixic acid had a pronounced delay in absorption, while the others had the anticipated peak levels and plasma half-lifes. All patients had a lower percentage of conjugated drug and of drug present as the hydroxynalidixic acid metabolite on the first day of treatment than during convalescence. Thus, some patients with diarrhea had altered absorption and all had altered metabolism of nalidixic acid during the acute phase of shigellosis. In 10 of 21 ampicillin-treated patients there were depressed plasma levels and prolonged half-lifes. These were statistically likely to be younger, to have more severe diarrhea, and to have lower body weight than those with normal peak plasma levels and plasma clearance rates.

Original languageEnglish (US)
Pages (from-to)879-886
Number of pages8
JournalClinical Pharmacology & Therapeutics
Issue number6
StatePublished - Jan 1 1972

ASJC Scopus subject areas

  • Pharmacology
  • Pharmacology (medical)


Dive into the research topics of 'Absorption of ampicillin and nalidixic acid by infants and children with acute shigellosis'. Together they form a unique fingerprint.

Cite this