Ketamine is a parenterally administered non barbiturate anaesthetic agent, in use for more than a decade. It is a safer than Na Pentothal. Administered intramuscularly, in dose of 6 to 15 mgm/Kg body wt. it produces dissociative anaesthesia. But, in smaller sub anaesthetic doses it may act as an abreactant. We report in this study the abreaction effect of Ketamine in dose of .5 to 1.5 mgm/kg body wt. given intramuscularly in 30 selected psychiatric cases requiring narcoanalysis for diagnostic or therapeutic purpose. The results are compared with another ten cases subjected to pentothal interview and five cases subjected to narcoanalysis with intravenous Na Amytal and methidrine. Our findings suggest that Ketamine has property of an efficacious abreactant in doses of 1 to 1.5 mgm/kg body wt. administered intramuscularly and can successfully be used for narcoanalysis in properly selected cases as a good substitute for intravenous pentothal or sodium amytal with methidrine. The relative cardio respiratory safety and ease of administration are its two added advantages
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