I Broke My 5th Metatarsal Last October And Did Physical

I broke my 5th metatarsal last October and did Physical Therapy for 2 months in December and January for pain in groin and lower abdomen area. Now I am doing PT for other side of groin area as I cannot cross my leg. I was advised to take a muscle relaxant and not sure which one as in the past I had a bad experience with it.