How to Use Drionic Device to Stop Excessive Sweating Hyperhidrosis. Drionic is an iontophoresis machine used to treat excessive sweating, otherwise known as hyperhidrosis. Hyperhidrosis is a condition that causes excessive sweating on the hands, feet or underarms. The excessive sweating can be triggered by anything or sometimes nothing at all. Hands and feet can sweat so much they begin to drip and constant hand washing and drying of hands only make them worse. Hyperhidrosis sufferers can have social problems as they don’t want to shake hands or touch others, they can also have problems writing with pencils or turning doorknobs with their constantly wet hands. Fortunately, this excessive sweating is highly treatable with Drionic! Here are some steps to combating hyperhidrosis with the Drionic iontophoresis machine.