Add time:09/30/2019         Source:sciencedirect.com

NORCOCAINE (cas 18717-72-1) is the N-demethylated metabolite of cocaine. It is present in the CNS and is reported to be pharmacologically active. The present study was designed to evaluate the cardiovascular actions of norcocaine following central administration. Wistar Kyoto (WKY) rats were anesthetized with pentobarbital and instrumented for measurement of blood pressure and renal and hindlimb blood flow (via Doppler flowprobes). A cerebroventricular cannula was placed in the lateral ventricle for drug administration. Cocaine or norcocaine was administered centrally in a dose range of 0.025 to 4.0 mg/kg. Under the above experimental conditions, 4.0 mg/kg of norcocaine decreased blood pressure without a significant change in either hind limb or renal blood flow. Central administration of cocaine also produced a similar depressor response. In conscious, unrestrained rats, cocaine produced a pressor response while norcocaine did not significantly alter blood pressure. The depressor response to both cocaine and norcocaine in the anesthetized animal is speculated to be due to the local anesthetic properties of the drugs.

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