zaleplon, Sonata (cont.)

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PREPARATIONS: Capsules: 5 and 10 mg

STORAGE: Capsules should be stored at room temperature, between 20-C (68-77 F).

PRESCRIBED FOR: Zaleplon is used for the short-term treatment of insomnia. It decreases the time to the onset of sleep and was used for up to 5-weeks in clinical trials. It does not increase total sleep time or decrease the number of awakenings.

DOSING: The recommended dose is 5 to 20 mg at bedtime for assistance in falling asleep. Because of its short duration of activity, it is not effective for persons who wake up during the night. Zaleplon should be taken immediately before bedtime or after going to bed and experiencing difficulty falling asleep. Taking zaleplon with a high-fat meal slows its absorption and may also slow its onset of action.

DRUG INTERACTIONS: Rifampin reduces the amount of zaleplon in the blood by more than 80%. This could lead to a decrease in zaleplon's activity. Cimetidine (Tagamet) can increase the amount of zaleplon in the blood by 85% by reducing the breakdown of zaleplon in the liver. If cimetidine must be used, lower doses of zaleplon are suggested. Ketoconazole (Nizoral, Extina, Xolegel, Kuric), erythromycin and similar drugs that reduce breakdown of drugs in the liver also increase blood concentrations of zaleplon. The drowsiness that can occur with zaleplon is accentuated by alcohol, and, therefore, patients taking zaleplon should not drink alcoholic beverages. Imipramine (Tofranil, Tofranil-PM) and thioridazine also increase drowsiness when combined with zaleplon.

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