Preparation and pharmacokinetics of cefquinome sulfate liposomes in goats

We evaluated the pharmacokinetics of cefquinome sulfate (CEF) liposomes in eight healthy goats following intramuscular administration at 4 mg/kg. The average particle diameter of CEF liposomes prepared by the ethanol injection method was 335nm with a CEF entrapment efficiency of 69.56%. The elimination half-life (t1/2β) of CEF liposomes was 33.04h compared with 16.21 h for CEF injected without carrier (p<0.05). The area under the concentration curve (AUC) for CEF liposomes was approximately three-times greater than for CEF alone (P<0.05). The time-point of maximum plasma concentration of the drug (Tp) and the maximum plasma concentration (Cmax) were 4.38 h and 1.99 ìg/mL for CEF liposomes, compared with 1.86 h and 3.55 ìg/mL for CEF without carrier, respectively.