Each packet contains a single dose of medicine. Sanitary because no one touches it except the person taking it. The pure pain relief in Tylenol Extra Strength works fast on headaches. Will not damage your stomach the way aspirin or even ibuprofen can. Reduces fever. Temporarily relieves minor aches and pains because of headache, muscular aches, backache, minor pain of arthritis, the common cold, toothache and premenstrual and menstrual cramps.