SummaryKetamine and medetomidine produced chemical restraint for minor procedures in mice. Male mice required SOmg/kg ketamine, 10 mg/kg medetomidine intraperitoneally (Lp.), and females a higher dose of ketamine 175 mg/kg i.p.l. The onset of restraint effects, judged by loss of righting reflex, was more rapid in males than females. The effects were reversed using atipamezole (1-2.5 mg/kg). Recovery following administration of atipamezole was more rapid in males than females. We conclude that ketamine/medetomidine, followed by reversal with atipamezole, is an effective technique for chemical restraint in the mouse.
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