Does Midol physically stop the uterus from contracting?

Question

By blocking prostaglandins, does the drug keep the uterus from contracting, or does it simply alter pain reception?

Answer 1

No, it just dulls your senses. It can get rid of headaches too.  

Answer 2

No, just like all over the counter pain relievers it only alters your pain reception.

Midol's active ingredient is Naproxen sodium (Alieve) which is an anti-inflammatory, so it will help with any swelling and pain, but it does not actually effect your uterus in any way. Technically a man could take Midol for a headache, backache, etc. and it would work for him.