If you test positive in the 80 hr. Test can they determine if its from a drink or something like nyquil?

Absolutely not.* Grandma's rum cookies, room de-odorizers, hair treatment products, lighting your barbecue grill, working on your car or drinking a shot of Jack Daniels can all register the same on this test.

As example, see Ethylylglucuronide/Ethyl sulfate