iontophoresis, and you won't regret it. I think iontophoresis will dry any hands if it dried mine. I have excessive hand, feet, facial, underarm, and facial blushing. I treated my hands with ionto and the sweating on my hands have dried around 90% of the areas, sweating on my feet and underarms lessened, and sweating on my face, even though I sweat off plenty, isn't as drastic as before. Try it out, and I'm very sure it will work. The only thing is that you need a good sum of money to get any of the better machines, or you can make a homemade one. I never tried the homemade one, but I tried Drionic, which did practically nothing, and I tried Idrostar, which works like a charm with big tubs and works on batteries instead of an ac adapter (my drionic got fried after I programmed it to work with an adapter, and idromed 5 works with an adapter, so working on batteries seems very safe for your machine.)
Oral medication should only be used for certain situations, because they leave you far worse emotionally and psychologically than when you were without them. Ditropan wrecks your brain and you become all hazy and feel stupid throughout most of the day. And you keep going into the bathroom, which is what makes you dry, since you're ridding your body of all fluids, none through perspiration.
GOOD LUCK, and if you ask me, it's worth it to save up for Idrostar.