Potentiation of clonidine analgesia by amitriptyline

Adithan, C.; Sivagnanam, G.; Swain, R.; Shashindran, C.H.; Bapna, J.S.

Indian Journal of Experimental Biology 24(4): 256-258

1986


ISSN/ISBN: 0019-5189
PMID: 3770816
Document Number: 279082
Effect of amitriptyline pretreatment on clonidine analgesia was assessed in mouse by acetic acid writhing assay. Amitriptyline potentiated clonidine analgesia and produced a parallel shift of the dose-response curve of the latter, suggesting a common pathway for their analgesic activity. Naloxone failed to reverse their analgesic activity, whereas yohimbine, a selective alpha-2 blocker, completely revesed it. It is suggested that their analgesic activity is not mediated through opioid receptors, but by alpha-2 adrenergic receptors.

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