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Shivering is a very common complaint in many patients intra-operatively after spinalanaesthesia. The reasons for shivering are multiple. Several measures are taken to prevent and controlshivering under spinal anaesthesia. These measures include pharmacological and non- pharmacologicalintervention. Pharmacological intervention is an effective method to control shivering under spinalanaesthesia because the drugs for controlling shivering are easily available and it is cost effective. Thepresent study was planned to compare effectiveness of two drugs: Butorphanol and Clonidine which weregiven intravenously to control shivering under spinal anaesthesia.Material and Methods: The design of study was randomized and double blind. It included total of60 patients of ASA I/II physical status. These patients were posted for elective surgeries under spinalanaesthesia; which included lower abdominal, urological and lower limb surgeries. Among these; patientswho developed shivering of Grade 3 or 4 intra-operatively were included in our study. These patientswere randomly divided into two groups: Group C and Group B. Each group included 30 patients. GroupC patients were given Clonidine 1 mg /Kg and Group B patients were given Butorphanol 0.03 mg/Kgintravenously. The drugs were given after patient developed shivering of grade 3 / 4 intra-operativelyduring spinal anaesthesia. Time needed for control of shivering; whether complete or incomplete controlof shivering, side effects of drugs and recurrence of shivering were observed and noted.Results: The study groups were comparable with respect to demographic profile, duration of surgery andmean time for onset of shivering. Time required for control of shivering was more with Clonidine (331.3370.65 seconds) as compared to Butorphanol (81.1737.38 seconds). The incidence of recurrence wassignificantly more with Clonidine as compared to Butorphanol (P such as hypotension and bradycardia was significantly

Comparision of butorphanol and clonidine for control of intraoperative shivering under spinal anaesthesia