Advil Pain Reliever/Fever Reducer Liqui-Gels. Temporarily relieves minor aches and pains due to: headache, toothache, backache, menstrual cramps, the common cold, muscular aches, minor pain of arthritis. Temporarily reduces fever. Nothing works better on headaches than Advil.* Rush real liquid relief right where you need it and feel better fast. *Among leading OTC pain relievers.