Those are some of the only recreational otc drugs you're going to be able to find. And I would steer clear from DPH, it's a deliriant. I've never met a person that enjoyed it, just a whole lot of people who regretted it.
My girlfriend likes the drowsy feeling OTC sleep aids give. Is it possible for her to keep that "down" feeling for long periods without getting the hallucinations from too many zzzquil or sleepeze pills