Over the Counter Medicine (OTC) consist of are two type, Non-steroidal Anti-Inflammatory Drugs NSAIDs, (Ibuprofen, Naproxen) and Acetaminophen (Tylenol). Acetaminophen works in the brain to blocks the Pain message. Both types of OTC relieve pain and reduce fevers but NSAIDs also reduce inflammation (Swelling). OTCs are widely used they are brought in convenience and other type stores everyday. You should have the most popular brands available for your customers to purchase. Because when looking for fast pain relief people go to convenience stores.