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- Document 0029
- DOCN M9610029
- TI Clinical pharmacokinetics of cidofovir in human immunodeficiency
- virus-infected patients.
- DT 9601
- AU Cundy KC; Petty BG; Flaherty J; Fisher PE; Polis MA; Wachsman M; Lietman
- PS; Lalezari JP; Hitchcock MJ; Jaffe HS; Gilead Sciences, Inc., Foster
- City, California 94404, USA.
- SO Antimicrob Agents Chemother. 1995 Jun;39(6):1247-52. Unique Identifier :
- AIDSLINE MED/96012180
- AB The pharmacokinetics of cidofovir (HPMPC;
- (S)-1-[3-hydroxy-2-(phosphonylmethoxy)propyl]cytosine) were examined at
- five dose levels in three phase I/II studies in a total of 42 human
- immunodeficiency virus-infected patients (with or without asymptomatic
- cytomegalovirus infection). Levels of cidofovir in serum following
- intravenous infusion were dose proportional over the dose range of 1.0
- to 10.0 mg/kg of body weight and declined biexponentially with an
- overall mean +/- standard deviation terminal half-life of 2.6 +/- 1.2 h
- (n = 25). Approximately 90% of the intravenous dose was recovered
- unchanged in the urine in 24 h. The overall mean +/- standard deviation
- total clearance of the drug from serum (148 +/- 25 ml/h/kg; n = 25)
- approximated renal clearance (129 +/- 42 ml/h/kg; n = 25), which was
- significantly higher (P < 0.001) than the baseline creatinine clearance
- in the same patients (83 +/- 21 ml/h/kg; n = 12). These data indicate
- that active tubular secretion played a significant role in the clearance
- of cidofovir. The steady-state volume of distribution of cidofovir was
- approximately 500 ml/kg, suggesting that the drug was distributed in
- total body water. Repeated dosing with cidofovir at 3.0 and 10.0
- mg/kg/week did not alter the pharmacokinetics of the drug. Concomitant
- administration of intravenous cidofovir and oral probenecid to hydrated
- patients had no significant effect on the pharmacokinetics of cidofovir
- at a 3.0-mg/kg dose. At higher cidofovir doses, probenecid appeared to
- block tubular secretion of cidofovir and reduce its renal clearance to a
- level approaching glomerular filtration.
- DE Adult Antiviral Agents/ADMINISTRATION & DOSAGE/ANALYSIS/
- *PHARMACOKINETICS AIDS-Related Opportunistic
- Infections/COMPLICATIONS/DRUG THERAPY/ METABOLISM Cytomegalovirus
- Infections/COMPLICATIONS/DRUG THERAPY/METABOLISM Cytosine/*ANALOGS &
- DERIVATIVES/ADMINISTRATION & DOSAGE/ANALYSIS/ PHARMACOKINETICS
- Dose-Response Relationship, Drug Drug Therapy, Combination Female
- Human HIV Infections/COMPLICATIONS/DRUG THERAPY/*METABOLISM
- *Immunocompromised Host Kidney/METABOLISM Kidney Function Tests Male
- Metabolic Clearance Rate Middle Age Organophosphorus
- Compounds/ADMINISTRATION & DOSAGE/ANALYSIS/ *PHARMACOKINETICS
- Probenecid/ADMINISTRATION & DOSAGE/PHARMACOLOGY JOURNAL ARTICLE
-
- SOURCE: National Library of Medicine. NOTICE: This material may be
- protected by Copyright Law (Title 17, U.S.Code).
-
-