title: Pharmacokinetics of oral ciprofloxacin, 100 mg single dose, in volunteers and elderly patients.
abstract: The pharmacokinetics of ciprofloxacin following a single 100 mg oral dose were evaluated in elderly patients (mean age 74 years), laboratory staff (30-40 years) and students (less than 20 years). There were no significant differences in serum Tmax (1.2-1.3 h) or in overall serum elimination half-life (3.7-4.0 h) but Cmax in elderly patients was more than double that in young volunteers (P less than 0.005). The serum AUC value was greater both in fasting students (1.4 mg/h/l) compared with the same subjects after food (1.09: P less than 0.01) and, after food, in elderly patients (1.95) compared with students (0.81: P less than 0.005). Urinary recoveries were greater in fasting subjects and in all categories of volunteers compared with elderly patients. However, in the elderly, urinary ciprofloxacin concentrations (0-6 h mean 66 mg/l: range 17.4-200 mg/l) were more than adequate for the eradication of urinary pathogens.
mesh_terms: D000284:Administration, Oral; D000328:Adult; D000368:Aged; D000890:Anti-Infective Agents / Q000008:administration & dosage / Q000378:metabolism*; D002851:Chromatography, High Pressure Liquid; D002939:Ciprofloxacin; D005215:Fasting; D006801:Humans; D007700:Kinetics; D011804:Quinolines / Q000008:administration & dosage / Q000378:metabolism*; D014552:Urinary Tract Infections / Q000188:drug therapy
chemical_list: D000890:Anti-Infective Agents; D011804:Quinolines; D002939:Ciprofloxacin