Tylox
"While pregnant with baby #3, I started having joints pop out of their sockets (I've been diagnosed with EDS, but at the time my doctors had no idea what was going on). This caused extreme pain, especially when it was a hip. 

My OB/GYN prescribed Tylox for the pain and it helped a lot. 

After giving birth, I was prescribed Tylox following my c-section and breastfed my baby with no ill effects. 

As for the "it is unknown if this medication passes into breastmilk"...that is completely untrue. Dr. Hale has studied nearly every medication on the market using breastmilk samples (& blood, plasma, etc). For any doctors reading this, or any nursing mothers, I recommend you look up "Medications and Mother's Milk"."