If you have tough pain like headaches, back pain, muscle pain and other body pains, Advil Liqui-Gels relieve pain faster and better than other OTC pain relievers. The medicine in Advil has been trusted by doctors for over 30 years. Nothing's been proven to work faster to relieve tough pain. Advil Liqui-Gels were designed for fast absorption, fast relief and hours of long-lasting pain relief. ER doctors rely on the medicine in Advil for their own aches and pain. Based on a survey of ER doctors * The pain reliever in Advil is ibuprofen, a non-steroidal anti-inflammatory drug (NSAID) that when taken as directed is a safe and effective pain reliever and fever reducer.