Two of my very close friends get Botox injections in their armpits. They claim that it works miracles. They both used to sweat constantly and were embarrased about stains. Today the two of them don't even think about sweating any more. They go to "Dr. Sweat" and he takes care of their problem. Anyway check out how much it costs to get the shots done. But make sure to go to a reliable doctor.