Unsuccessful Chemical Immobilization of a Roan Antelope (Hippotragus equinus) Using a Premixed Medetomidine-Ketamine Combination.

We unsuccessfully attempted to safely chemically immobilize a roan antelope (Hippotragus equinus) with a premixed combination of medetomidine (5 mg/mL) and ketamine (150 mg/mL) for injury treatment. This dose (0.066 mg/kg medetomidine and 1.96 mg/kg ketamine) produced poor quality of immobilization, probably exacerbated by stimulation before completing induction.