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Number of awakenings by hour (manual reading, 30-second cutoff) in healthy subjects, placebo vs zolpidem extended-release 12.5 mg and original zolpidem 10 mg. Key: *P < .05 vs placebo, †P < .05 zolpidem extended-release vs original zolpidem, and ‡P = .0542 zolpidem extended-release vs original zolpidem. With permission from CNS Drugs.[24] Copyright 2006, Adis International.
