Belladonna Plasters are a clinically proven treatment for muscular aches and pains, the only plaster of its type that is licensed for this kind of treatment. These plasters stay in place for 2 ? 3 days, helping to warm your sore, tight muscles and easing your pain. These plasters come in two different sizes, so you can choose which is the best for the pain you?re trying to treat. If you?re using for a way to soothe aches and pains that uses a natural active ingredient, Belladonna Plasters could be the perfect choice for you.