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The current experiment investigated the effect of 3,4-methylenedioxymethamphetamine (MDMA; ‘Ecstasy’) preexposure on the acquisition of intravenous amphetamine self-administration and the reinstatement of amphetamine-seeking behavior by either MDMA or amphetamine. Rats were preexposed to a 5-HT depleting regime of MDMA (5 mg/kg every hour for 4 h on two consecutive days) or equivalent vehicle injections...
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