Doxylamine

I went to my local pharmacy looking for Seconal, that is used as a sleeping pill. They didn't have any. But they did have Nervo Tiamin, that would do the same thing. Wikipedia says it is a first-generation
Antihistamine. A deferent kind of drug that is used for similar purposes. 

It is also used for morning sickness, in case I get pregnant. 
And my debit card would pay for it ($20) even though there was no money in my account!