Hello! Botox has been shown to result in an 82-87% decrease in sweating. Results start to be noticeable approximately 2 to 4 days after treatment with the full effects usually noted within 2 weeks. Dryness typically lasts 4 to 12 months but some studies have found it can last as long as 14 months. Additional statistics from published research studies have shown that repeated treatment with Botox is safe and effective for hyperhidrosis and consistently results in meaningful, long-lasting improvements in an excessive sweating patient’s symptoms, daily functioning, and quality of life. Botox treatment for hyperhidrosis has also been scientifically proven to improve on-the-job productivity. While sweating is an essential body function for temperature-control, localized body areas house only a small percentage of the body's sweat glands (the underarms, for instance, are home to less than 2% of the body’s sweat glands. You must give it more time to take effect. Can take up to 2 weeks for full results.