To answer your question, yes. Are they the best for falling into a nice, deep sleep? No.
If you don't have any pharamceutical medicine or access to GHB, you can take Nytol, Tylenol PM, or if you are desperate, you can even take an antihystamine such as Benadryl. There are other brands you can take, but you need to just go to Wal Mart and look for yourself if interested.
Be careful not to overdo it with these OTC meds. Read the directions and follow them (sort of). You can take an extra Nytol or 2 and you'll be fine, but don't go overboard, as these medicines can be just as dangerous as illegal drugs if you OD.
My recommendation: next time you do Foxy, get your hands on some benzos or something equivalent to fall asleep.