Tylenol is a popular over-the-counter pain reliever and fever reducer, and its main rivals are BAYER, ALEVE, ANACIN, and ADVIL. BAYER is a German pharmaceutical and life sciences company that produces a variety of products, including the pain reliever Aspirin. ALEVE is a brand of naproxen sodium, a nonsteroidal anti-inflammatory drug used to treat pain and inflammation. ANACIN is an over-the-counter analgesic and fever reducer that contains aspirin and caffeine. ADVIL is a brand of ibuprofen, another nonsteroidal anti-inflammatory drug used to treat pain and inflammation. All of these products are competitors of Tylenol and are used to treat similar conditions.