Motrin (Ibuprofen) is a life saver for me when it's that dreaded time of the month. Helps with my muscle spasms and back aches, as well as cramping. I always have to have a bottle on hand for emergencies. An amazing anti-inflammatory.
Works just the same as "brand" ibuprofens! You can also find it on sale and in multiple forms (tablet, capsule, etc) in multiple counts very easily. Works great in reducing fever/swelling/aches and pains.