
Keywords: گیرنده های Muscarinic; Antinociception; Muscarinic receptors; α2-adrenoceptors; Serotonin 5-HT2A/2C receptors; Opioidergic receptors; Protocatechuic acid; ATR; atropine; CTRL; control group; HT; serotonin; i.p.; intraperitoneal; KTS; ketanserin; MPE; maximal possible effect; N