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Immobilisation of rats for 1, 2 and 4 h induced duration-related antinociception. Antinociception induced by 4 h immobilisation was significantly inhibited after pretreatment by drugs known to inhibit synthesis of serotonin, induce degeneration of serotonergic neurones and inhibit prostaglandin synthesis. The results indicate that immobilisation stress(More)
1. The antinociceptive effect of prostaglandins E1, E2 and F2alpha was studied in albino rats. Though all three prostaglandins produced similar degrees of sedation, only prostaglandin E1 (PGE1) produced a dose-related antinociceptive activity. 2. The antinociceptive activities of equi-analgesic doses of morphine (7.5. mg/kg, i.p.) and PGE1 (2.0 mg/kg, i.p.)(More)
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