Oxybutynin
"I'm so grateful I read about Oxybutynin for hyperhydrosis on drugs.com 3 weeks ago it has already saved me so much anxiety, discomfort and embarrassment. I can't believe I can feel confident and comfortable in public now. THANK YOU! My crazy sweating began 2 years ago from Opiate Replacement Therapy (an extremely common side effect of methadone & Suboxone) Even in winter, just grocery shopping left me covered in sweat but since day 2 of Oxybutynin NOT ONE BEAD OF SWEAT I feel so lucky! I haven't tried exercising on it yet but I'll update when I do :) 
In addition to Methadone 50mg, I take Lexapro, Norimin, Ritalin & Serequel 25mg which would increase my side effects so far of dry mouth and 3 headaches but small sacrifice!"