Clonidine
Gabapentin/pregabalin/baclofen
Diazepam/clonazepam
Depending on what you’re coming off of buprenorphine, methadone, DHC or tramadol (or even kratom)
Non medication stuff too: Tiger Balm, massages, hot baths, saunas, and exercise
And don’t forget the fun stuff: sex/orgasms, dancing, yoga, tai chi, qigong, and other body practices also tend to help