I've tried basically everything on the market--benadryl actifed, dramamine, zquil, melatonin. On and on. My brain just laughs at them. They do nothing for me. Part of the reason I used to drink was it put me to sleep reliably. I am in recovery now, so that is off the table.

I say run it by your pdoc to be sure she/he feels okay with whatever you're using. In my own experience, pretty much all sleep aids, including the strongest prescription ones like Seroquel, ultimately stop working. That's where I am now. Nothing works. It's quite hard (I did not ever sleep last night, eg). Anyhoo, if you are lucky enough to have found something that does the trick for you, that is fantastic. Antihistamines are relatively safe, but I would still run it by the doc.