Sonata Ingredients and Composition

Sonata Information

Sonata Ingredients and Composition

Zaleplon, the active Sonata ingredient, is a nonbenzodiazepine hypnotic from the pyrazolopyrimidine class. The chemical name of zaleplon is N-[3-(3-cyanopyrazolo[1,5-a]pyrimidin-7-yl)phenyl]-N-ethylacetamide. Its empirical formula is C₁₇H₁₅N₅O, and its molecular weight is 305.34.

Zaleplon is a white to off-white powder that is practically insoluble in water and sparingly soluble in alcohol or propylene glycol. Its partition coefficient in octanol/water is constant (log PC = 1.23) over the pH range of 1 to 7.

Sonata capsules contain zaleplon as the active ingredient. Inactive ingredients consist of:

• microcrystalline cellulose
• pregelatinized starch
• silicon dioxide
• sodium lauryl sulfate
• magnesium stearate
• lactose
• gelatin
• titanium dioxide
• D&C yellow #10
• FD&C blue #1
• FD&C green #3
• FD&C yellow #5

Sonata Information