title: Pharmacokinetics and urinary excretion of sulphadimidine in buffalo calves.
abstract: Pharmacokinetics and urinary excretion of sulphadimidine (SDI) were determined in buffalo calves following single oral administration (150 mg/kg). The plasma levels of free sulphadimidine were above minimum effective therapeutic concentration (> 40 micrograms/ml) between 4 and 12 h and the N4-acetylated form of the drug was in the range of 7.2-19.3%. Kinetic evaluation of plasma levels was performed using a two-compartment open model. The absorption and elimination half-lives of SDI were 3.01 and 11.94 h, respectively. Based on this study, an optimal dosage regimen of sulphadimidine in buffalo calves would be 100 mg/kg, followed by 50 mg/kg at 12 h intervals. Sulphadimidine was mainly excreted in the urine as free amine. The percentage of N4-acetyl sulphadimidine in urine was comparatively higher than in plasma.
authors.affiliation: Department of Veterinary Pharmacology and Toxicology, CCS Haryana Agricultural University, Hisar, India.
authors.forename: S K
authors.initials: SK
authors.lastname: Jain
authors.forename: J S
authors.initials: JS
authors.lastname: Punia
authors.forename: B D
authors.initials: BD
authors.lastname: Garg
mesh_terms: D000818:Animals; D000890:Anti-Infective Agents / Q000008:administration & dosage / Q000097:blood / Q000493:pharmacokinetics* / Q000652:urine; D019540:Area Under Curve; D002020:Buffaloes / Q000502:physiology*; D006207:Half-Life; D008297:Male; D013418:Sulfamethazine / Q000008:administration & dosage / Q000097:blood / Q000493:pharmacokinetics* / Q000652:urine
chemical_list: D000890:Anti-Infective Agents; D013418:Sulfamethazine