Tylenol is very effective.

Tylenol belongs to the acetaminophen class and temporarily relieves pain and reduces fever. It is said to be effective for headaches, back pain, chills, menstrual pain, muscle pain, and mild arthritis pain. It can be taken 4 to 6 times a day, but due to the risk of liver damage, follow the instructions on the label, and if long-term use is necessary, be sure to consult a doctor.

I am now menopausal, but I have always taken Tylenol for menstrual cramps and sometimes for headaches as well. My daughter also keeps Tylenol as a household staple because of menstrual cramps.