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- W1974250376 abstract "A series of 4,6-diaryl pyridazinones, chemically related to trazodone, ws synthesized and evaluated for analgesic activity. With ED50 values ranging from 8.4 to 46.7 mg kg(-1) i.p. in the phenylbenzoquinone-induced writhing test (PBQ test), most compounds were several times more potent than acetaminophen (ED50 = 231.3 mg kg(-1) i.p.) and noramidopyrine (ED50 = 68.5 mg kg(-1) i.p.). A multiple linear regression analysis demonstrated a correlation between antinociceptive activity and lipophilicity, as well as electronic and steric factors. The most active pyridazinones 2c and 2j exhibited minimal sedative and neurotoxic effects at the dose of 25 mg kg(-1) i.p. They were devoid of activity in the hot plate test and their analgesic activity was not significantly reversed by naloxone in the PBQ test. The antinociceptive response induced by morphine (0.15 mg kg(-1) s.c.) in the PBQ test was greatly potentiated by 2c and 2j administered at the low doses of 1 and 2.5 mg kg(-1) i.p., respectively. On the other hand, their analgesic effects were enhanced synergistically by 5-hydroxytryptophan combined with carbidopa. All these data imply that a significant part of the antinociceptive effect induced by 2c and 2j may involve both opioid and serotonergic pathways. In addition, these two pyridazinones did not exhibit any antidepressant properties in the forced swimming test, nor did they potentiate yohimbine-induced toxicity." @default.
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- W1974250376 date "1996-01-01" @default.
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- W1974250376 title "Synthesis and Trazodone-like Analgesic Activity of 4-Phenyl-6-aryl-2-(3-(4-arylpiperazin-1-yl)propyl)pyridazin-3-ones." @default.
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- W1974250376 doi "https://doi.org/10.1248/cpb.44.980" @default.
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