title: Disposition kinetics of ciprofloxacin in lactating goats.
abstract: The pharmacokinetics of ciprofloxacin following intravenous and intramuscular administrations in lactating goats were investigated. Ciprofloxacin was administered as a single dose of 5 mg kg-1 body weight for both routes and was assayed in biological fluids, (serum, milk and urine) to determine its concentrations, kinetic behaviour, and systemic availability. Following a single i.v. injection, the serum concentration-time curve was best described by a two-compartment open model. The elimination half-life (t0.5 beta) was 2.78 +/- 0.08 hours. The extent of serum protein binding of ciprofloxacin in goats was 14.2 +/- 1.4%. Volume of distribution at steady-state was 2.14 +/- 0.07 L/kg. Total body clearance of ciprofloxacin in goats was 14.7 +/- 0.43 ml/min/kg. Following a single intramuscular administration, ciprofloxacin was rapidly absorbed and the mean peak serum concentration (1.92 +/- 0.05 micrograms ml-1) was achieved 1 hour post administration. The systemic availability of ciprofloxacin after intramuscular administration was 95.9 +/- 6.4%. The drug was detected in therapeutic concentrations for 10 hours in serum and milk and for 24 hours in urine. Following intramuscular injection at 5 mg kg-1 body weight for 5 consecutive days, ciprofloxacin showed a cumulative behaviour in serum, milk and urine of goats.
authors.affiliation: Department of Pharmacology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt.
authors.forename: H A
authors.initials: HA
authors.lastname: el-Banna
authors.forename: K
authors.initials: K
authors.lastname: Abo el-Sooud
mesh_terms: D000818:Animals; D000890:Anti-Infective Agents / Q000008:administration & dosage / Q000097:blood / Q000493:pharmacokinetics*; D001682:Biological Availability; D002939:Ciprofloxacin / Q000008:administration & dosage / Q000097:blood / Q000493:pharmacokinetics*; D005260:Female; D006041:Goats; D007273:Injections, Intramuscular; D007275:Injections, Intravenous; D007774:Lactation / Q000502:physiology*; D008892:Milk / Q000378:metabolism; D008954:Models, Biological
chemical_list: D000890:Anti-Infective Agents; D002939:Ciprofloxacin