Abstract
Abstract Extract Sir:— In the 12 months since the completion of the trials reported in this Journal(1) over 3000 doses of yohimbine have been used to reverse xylazine sedation in deer at Invermay and in field trials throughout New Zealand. During this time four deer have suffered transient convulsions characterised by tetanic spasms, paddling of the limbs, inability to stand and rapid nodding of the head. This was accompanied by rapid blinking of the eyelids and grinding of the teeth. These signs abated in 5 to 10 minutes after which time the deer relaxed and regained its ftet in 10 to 20 minutes. In the 30 minutes prior to yohimbine administration these deer had received a single injection of xylazine (0.5 to 1.0 mg/kg) and on one occasion the xylazine was given in conjunction with Img of fentanyl and 8 mg azaperone (0.1 ml Fentaz). On each occasion the intention was to inject yohimbine at the recommended dose rate (1) (0.2 to 0.25 mg/kg) into the jugular vein and the convulsions commenced within five se...
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