Aluminum chloride hexahydrate
"I had been suffering from hyperdidrosis for about two years. The most unbearable and uncomfortable situation was the feeling of drops of sweat roll down my side. I had to change my wardrobe completely. I would come back from school and immediately have to change my shirt. I had tried everything!  I tried home remedies to all kinds of deoderants, but nothing worked. Not only was it embarassing, but the sensation of having sweaty underarms was uncomfortable. I told my doctor about and she gave me drysol. It was a MIRACLE! The day after I put it on, my sweat was 99% GONE!! Just a little burning, but not to bad. It reduced my sweating and know I can go back to the life I used to have. Thank the heavens for this product! Love it!"