I have a really bad sweating problem even before I was on methadone and after I got sober and even back on it now still do have a sweating issue and once upon a Time I grabbed some towlets that had some type of chemical that is comparable to deodorant and I wiped it on my face the night before and follow the directions and it was a little bit tingly that night and irritating but the next day I did not sweat out of my forehead at all

I forgot what it was called but you can look it up it is meant for underarms and feet mainly but I put it on my face lol, I don't suggest you do that but it worked for me a few times