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- J Giordano and S M Sacks.
- Pain Clinic, Southeast Texas Rehabilitation Hospital, Beaumont 77707, USA.
- Eur. J. Pharmacol. 1997 Sep 3;334(1):39-41.
AbstractIntraplantar co-administration of sub-anesthetic doses of bupivacaine (2.5 microg) or lidocaine (7.5 microg) increased the dose- and time-dependent analgesic effects of the 5-HT3 receptor antagonist, 3-a-tropanyl-1-H-indole-3-carboxylic ester (ICS-205 930) (1-100 microg; 50 microl) against inflammatory pain induced by hindpaw inoculation with complete Freund's adjuvant. The effects of bupivacaine were greater than lidocaine at all doses of ICS-205 930 tested. These findings may reflect facilitation of ICS-205 930 effects through negative allosteric modulation by bupivacaine and lidocaine of peripheral 5-HT3 receptors involved in nociceptive processing.
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