• Clin. Pharmacol. Ther. · Dec 2010

    Randomized Controlled Trial Comparative Study

    Acute alertness-promoting effects of a novel histamine subtype-3 receptor inverse agonist in healthy sleep-deprived male volunteers.

    • R Iannone, J Palcza, J J Renger, N Calder, K Cerchio, K Gottesdiener, R Hargreaves, D J Dijk, J Boyle, and M G Murphy.
    • Merck Research Laboratories, West Point, Pennsylvania, USA. robert_iannone@merck.com
    • Clin. Pharmacol. Ther. 2010 Dec 1;88(6):831-9.

    AbstractThe alertness-promoting effect of MK-0249 (10 or 50 mg), a histamine subtype-3 receptor (HRH3) inverse agonist (IA), was evaluated in the stimulant reference sleep deprivation model (SRSDM) using a double-blind, double-dummy, placebo- and modafinil- (200 mg) controlled, four-period crossover design in 24 healthy young men. The two primary hypotheses were related to sleep latency (first appearance of one epoch of stage 2, 3, or 4 or REM sleep, as detected using polysomnography (PSG)) at 8:00 AM on day 2. Statistically significant increases in sleep latency were observed in association with the use of modafinil 200 mg (9.07 min; P < 0.0001), MK-0249 50 mg (5.17 min; P = 0.008), and MK-0249 10 mg (5.45 min; P = 0.005) at the maintenance of wakefulness test (MWT) at 8:00 AM. Sleep latency was higher when averaged over all MWT time points (P < 0.0001 for modafinil and for both doses of MK-0249). The alertness-promoting effect with the use of MK-0249 in the SRSDM suggests that HRH3 IAs may be effective in disorders involving excessive somnolence.

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