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The designation placebo + zolpidem-Eisai Inc.-insomnia refers to the control interventions used in clinical trials sponsored by Eisai Inc., specifically in the evaluation of the abuse potential of the dual orexin receptor antagonist lemborexant (NCT03158025). This group includes a placebo as a negative control and zolpidem as a positive control. Zolpidem is a non-benzodiazepine hypnotic of the imidazopyridine class that acts as a positive allosteric modulator of the GABA-A receptor, with high affinity for the alpha-1 subunit. It is widely approved for the short-term treatment of insomnia characterized by difficulties with sleep initiation. In the context of the Eisai study, zolpidem was administered at a supratherapeutic dose (30 mg) to healthy recreational sedative users to provide a benchmark for comparing the sedative and reinforcing effects of investigational compounds.
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