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Abstract

Behaviorally inactive doses of mianserin antagonize the suppressant effect of lysergic acid diethylamide on a fixed-ratio operant.

L P Dwoskin and S B Sparber
Journal of Pharmacology and Experimental Therapeutics April 1983, 225 (1) 77-84;
L P Dwoskin
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S B Sparber
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Abstract

Male Sprague-Dawley rats were trained to respond for food reinforcement on a fixed-ratio 15 schedule. Low, behaviorally inactive, doses of mianserin (0.1-1.0 mg/kg) administered 30 min before the operant session antagonized the behavioral suppression induced by lysergic acid diethylamide (LSD; 50 micrograms/kg) administered immediately before the session. Mianserin (0.5-1.0 mg/kg) also partially antagonized the behavioral suppressant effects of higher doses of LSD. At a dose which suppressed behavior to 70% of control when administered alone, mianserin (10 mg/kg) did not antagonize the behavioral suppression induced by LSD (100-200 micrograms/kg). The data suggest that the suppression of operant behavior produced by mianserin may be the result of nonselective or multiple actions, or possibly the emergence of an LSD-type partial agonist property. Specificity of drug action as an antagonist apparently occurs at the behaviorally inactive, low doses of mianserin which may act through a selective blockade of serotonin receptors stimulated by LSD.

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Journal of Pharmacology and Experimental Therapeutics
Vol. 225, Issue 1
1 Apr 1983
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Abstract

Behaviorally inactive doses of mianserin antagonize the suppressant effect of lysergic acid diethylamide on a fixed-ratio operant.

L P Dwoskin and S B Sparber
Journal of Pharmacology and Experimental Therapeutics April 1, 1983, 225 (1) 77-84;

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Abstract

Behaviorally inactive doses of mianserin antagonize the suppressant effect of lysergic acid diethylamide on a fixed-ratio operant.

L P Dwoskin and S B Sparber
Journal of Pharmacology and Experimental Therapeutics April 1, 1983, 225 (1) 77-84;
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