title: [Comparative study on the pharmacokinetics of rifampicin between the old and middle-aged tuberculosis patients].
abstract: The pharmacokinetics of rifampicin was studied in 16 tuberculosis patients including the elderly (64.3 +/- 4.8 yrs, n = 8) and the middle-aged (35.9 +/- 7.6 yrs, n = 8). 450 mg of rifampicin (RFP) were given orally. The concentration of RFP was assayed by HPLC. The plasma concentration-time curves of both groups fitted to one-compartment model. Important parameters were taken: t 1/2 2.39 +/- 0.66, 3.84 +/- 1.91 h; Cmax: 14.56 +/- 6.45, 9.83 +/- 2.55 micrograms/ml; vd: 0.43 +/- 0.11, 0.67 +/- 0.15L/kg; CL: 0.14 +/- 0.03, 0.13 +/- 0.06 L.h-1/kg respectively. No significant difference was found between the old and middle aged TB patients on the pharmacokinetics of rifampicin (P greater than 0.05). We suggest that 450 mg/day of rifampicin taken orally are available for aging tuberculosis patients.
authors.affiliation: Department of Pharmacology, Tianj in Medical College.
authors.forename: F H
authors.initials: FH
authors.lastname: Weng
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012293:Rifampin / Q000493:pharmacokinetics* / Q000627:therapeutic use; D014397:Tuberculosis, Pulmonary / Q000188:drug therapy / Q000378:metabolism*
chemical_list: D012293:Rifampin