Pilot controlled double-blind study of the hypnotic effects of zolpidem in patients with chronic 'learned' insomnia: psychometric and polysomnographic evaluation.

In a pilot double-blind trial in 21 patients with learned or idiopathic insomnia (DSM-IIIR), patients received placebo for 1 week (nights 1-7), either active (zolpidem, 10 mg) or placebo treatment for 2 weeks (nights 8-21) and then placebo for a further week (nights 22-28). Variables to measure efficacy, rebound and withdrawal were assessed daily from day 1 to day 28. Polysomnographic recordings together with sleep cycle analysis were performed on nights 7, 21 and 28.

Effect of zolpidem on sleep in healthy subjects: a placebo-controlled trial with polysomnographic recordings.

The aims of this double-blind, placebo-controlled study, conducted in a group of healthy young adults with normal sleep patterns, were to ascertain the effect of various doses of zolpidem on polysomnographic variables and to determine whether zolpidem disrupts sleep architecture. Of the 15 subjects recruited, 8 were included in the final analysis. Subjects underwent four experimental sessions during three nights, of which the first night was used for adaptation, the second for zolpidem (10, 20, and 40 mg) or placebo administration, and the third for placebo administration.

Long-term polysomnographic study of the efficacy and safety of zolpidem in elderly psychiatric in-patients with insomnia.

The effects of 20 mg zolipidem were studied in an open, polysomnographically-monitored 179 day trial in 14 elderly psychiatric patients suffering from severe insomnia. After a placebo run-in of 7 days, zolpidem was given for 179 days followed by a 30-day wash-out period. Polysomnographic recordings (PSG) were performed just before active treatment; 30, 90 and 179 days into the treatment period; and at the end of the wash-out period.

Multicenter, double-blind, controlled comparison of zolpidem and triazolam in elderly patients with insomnia.

The efficacy and safety of zolpidem, a hypnotic of a new chemical class (the imidazopyridines), was compared with a reference benzodiazepine in elderly insomniac patients in a randomized, double-blind, multicenter trial. Hospitalized patients aged 58 to 98 years were randomized to receive zolpidem 5 mg (70 patients), zolpidem 10 mg (74 patients), or triazolam 0.25 mg (77 patients) at bed-time.

The safety and efficacy of zolpidem in insomniac patients: a long-term open study in general practice.

The safety and efficacy of 10 or 20 mg/day zolpidem, a new hypnotic belonging to the imidazopyridine class, were studied over a 180-day period in 96 patients with sleep disorders. The treatment was continued for a further 180 days by 49 of these patients. Follow-up information from 21 patients who discontinued treatment after 180 days showed no rebound insomnia or withdrawal signs.