According to me Sonata means no sleep at night. I am an asthma patient and I tried so many medicines for this but caused insomnia. My physician prescribed this medicine for my sleep problems, a 10 mg capsule at night for three weeks. It gave me sleep of two hours after that I woke up and takes another capsule. The only benefit is that it made me woke up before computer till 4 in the morning. I remember this was the condition when I took Tylenol, at last I checked the expiry date. But it was in the time period and not at all helpful in my health condition.