Document 0501 DOCN M9490501 TI Levels of dapsone and pyrimethamine in serum during once-weekly dosing for prophylaxis of Pneumocystis carinii pneumonia and toxoplasmic encephalitis. DT 9411 AU Opravil M; Joos B; Luthy R; Division of Infectious Diseases, University Hospital, Zurich,; Switzerland. SO Antimicrob Agents Chemother. 1994 May;38(5):1197-9. Unique Identifier : AIDSLINE MED/94346835 AB Concentrations of dapsone, monoacetyldapsone, and pyrimethamine were determined in 36 serum samples from human immunodeficiency virus-infected patients on prophylaxis with once-weekly administration of dapsone-pyrimethamine (200 mg of dapsone-75 mg of pyrimethamine). During day 1 after ingestion, median levels of 1,038 ng of dapsone per ml and 356 ng of pyrimethamine per ml were found. During days 6 to 7, the dapsone level fell to < 20 ng/ml in five of nine serum samples, but the pyrimethamine level remained elevated (125 ng/ml). Concurrent, but separately ingested, didanosine administration did not seem to decrease the drug concentrations. DE Adult Aged Dapsone/ANALOGS & DERIVATIVES/ADMINISTRATION & DOSAGE/*BLOOD/ *THERAPEUTIC USE Drug Interactions Female Human HIV Infections/COMPLICATIONS/*METABOLISM Male Middle Age Phenotype Pneumonia, Pneumocystis carinii/*PREVENTION & CONTROL Pyrimethamine/ADMINISTRATION & DOSAGE/*BLOOD/*THERAPEUTIC USE Support, Non-U.S. Gov't Toxoplasmosis, Cerebral/*PREVENTION & CONTROL Zidovudine/ADVERSE EFFECTS/THERAPEUTIC USE JOURNAL ARTICLE SOURCE: National Library of Medicine. NOTICE: This material may be protected by Copyright Law (Title 17, U.S.Code).