dextromethorphan and doxylamine succinate- I used that to sleep for years, the sryup version from walgreens and walmart which both had 10% alcohol, worked great.
Can't use that with Flagil ABX though. Other than that...no problems, it was awesome for sleep, so dont take in the day, unless you plan on sleeping more.
Its easier/safer on the brain than Benadryl.
Both are marketed as antihistamines and sleep aids - a dual OTC medicine.
Had initial lyme symptoms late 80's, then again and with bullseye early 90's. Ended ABX for Lyme in 2015. Rebuilding / fine tuning / fixing muscles since then; member "10 Percenters Lyme Club". What an adventure this has been. Hashimotos adds to the enjoyment.