The active ingredients in Eazol are all natural. The proprietary blend contains White Willow, Lobelia and Boswellia to deliver a fast and effective pain relief. These high quality ingredients work with each other, so that they're even more effective together than they are alone. Eazol does not cause any gastrointestinal irritation that can occur when you use many other kinds of pain medication. There are no harsh chemicals in Eazol and it does not have any side affects if used correctly.