Talwin
PubChem Notes:
Pentazocine The first mixed agonist-antagonist analgesic to be marketed. It is an agonist at the kappa and sigma opioid receptors and has a weak antagonist action at the mu receptor. (From AMA Drug Evaluations Annual, 1991, p97)
MediLexicon pentazocine - Medical Dictionary Definition for Term 'pentazocine'
[1. An opioid agonist-antagonist analgesic with some possibility for addiction but this only rarely involves withdrawal syndrome and tolerance; irritating to tissues on local injection.
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