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Raffa, R.B. et al.

Raffa, Walker, Sterious,

Opioid receptors and acetaminophen (paracetamol).

We report that the acetaminophen (paracetamol)-induced spinal (intrathecal, i.t.)/supraspinal (intracerebroventricular, i.c.v.) site/site antinociceptive 'self-synergy' in mice is attenuated by the opioid receptor subtype selective antagonists beta-funaltrexamine hydrochloride (beta-FNA; mu), naltrindole (delta), and nor-binaltorphine hydrochloride (nor-BNI; kappa). These findings further implicate endogenous opioids (viz., endorphins, enkephalins, and dynorphins) and their pathways as contributors to the central antinociceptive action of acetaminophen.[1]

References

Opioid receptors and acetaminophen (paracetamol). Raffa, R.B., Walker, E.A., Sterious, S.N. Eur. J. Pharmacol. (2004) [Pubmed]

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