Is there a medicine for sweaty palms?

So I have sweaty palms. They don't swat alot, but it's embarrassing when I hold other people's hands and my hands sweat. I heard there's some medicine where you can put on your palms to temporarily stop it from sweating. I think it's like a roll-on medication. Is there such medicine avaliable? Are there ANY medication I can put on to stop my palms from sweating? Thanks!
 
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