Idk about OTC medication, but clonodine would help. Depending what state you?re in cannabis and CBD help. As for OTC, doxilamine succcinate in small doses may help, definitely for bed time helps. Try 5-HTP and excercise so your heart rate goes above 140 for at least 20-30+ minutes and you?ll get a ?runners high? aka dopamine reward which really helps and if you smoke cannabis right after it?s a double whammy. If you?re freaking out with cravings benzos will help but are addicting so you decide.
Perhaps loperamide in medium doses but I?ve never tried and I wouldn?t condone according to the threads I?ve read.
Last but not least, kratom, but I don?t know what strain helps opiates withdrawals and cravings, I?ve asked on many threads maybe someone can answer here.
That?s all I know I hope it helps somehow.
Oh and go to the pool or jacuzzi/epsom salt bath that helps