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  • Title: Zolpidem: an update of its pharmacology, therapeutic efficacy and tolerability in the treatment of insomnia.
    Author: Holm KJ, Goa KL.
    Journal: Drugs; 2000 Apr; 59(4):865-89. PubMed ID: 10804040.
    Abstract:
    UNLABELLED: Zolpidem is an imidazopyridine agent that is indicated for the short term (< or = 4 weeks) treatment of insomnia (recommended dosage 10 mg/day in adults and 5 or 10 mg/day in the elderly or patients with hepatic impairment). Data have shown that the hypnotic efficacy of zolpidem is generally comparable to that of the benzodiazepines flunitrazepam, flurazepam, nitrazepam, temazepam and triazolam as well as nonbenzodiazepine hypnotic agents such as zopiclone and trazodone in the treatment of elderly and adult patients with insomnia. The comparative efficacy of a recently available nonbenzodiazepine hypnotic zaleplon and zolpidem has yet to be established. There was no evidence of tolerance developing to the hypnotic effects of zolpidem in a number of studies of up to 6 months' duration. However, tolerance has been described in a few patients taking the drug at high dosages for periods of up to several years. Zolpidem is well tolerated in patients with insomnia and the most common adverse events are generally nausea, dizziness and drowsiness. Although zolpidem produced some psychomotor and memory impairment over the first few hours after administration, it had few next-day effects (including effects on daytime well-being and morning coordination). In this respect, it was comparable or superior to flunitrazepam and flurazepam and comparable to other benzodiazepines in patients with insomnia. Zolpidem appears to have a low potential for abuse. CONCLUSIONS: Zolpidem is effective and well tolerated in patients with insomnia, including the elderly. Studies have shown that zolpidem generally has similar efficacy to other hypnotics including benzodiazepines and zopiclone. Zolpidem appears to have minimal next-day effects on cognition and psychomotor performance when administered at bedtime. In addition, there is little evidence of tolerance to the hypnotic effects of zolpidem, or rebound insomnia or withdrawal symptoms after discontinuation of the drug when it is given as recommended (10 mg/day for < 1 month) or over longer periods.
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