My Friend Says His Back Hurts Constantly. He Keeps Taking These Pills That Are White, Scored, Oblong, Imprinted With Code M357. He Takes Quite A Few Daily, And He Won't Tell Me What They Are. About Half Way Through The Dat , Taking These Pills Regularly, Like 10 Of Them Between 8am. & 1pm. He Doesn't Seem Like The Person I Knew. He Just Tells Me They ( The Pills ) Help The Nerves In His Back, So His Back Won't Hurt As Much. It Seems To Me That He Is Taking A Lot Of These. Anybody Know What They May Be ? Like I Said, They Are Imprinted With The Code M357.