Driclor worked for me, as long as I put it on at night before going to bed. If I left it til morning it didn't work. Also don't apply after shaving - OUCH!
I spoke to my GP about other options, but he said that if you block or remove the sweat glands, then it will find somewhere else to escape which can be just as bad

Hopefully if it's just nervous sweats it will settle down....