Study Status: Completed
Recruit Status: Completed
Study Type: Interventional
Official Title: Pilot Study: To Assess the Safety, Tolerability and Effects of L-Arginine on Muscles in Boys With Dystrophinopathy on Corticosteroids
Brief Summary: The purpose of the study is to assess the safety, tolerability, and effects of L-Arginine on muscles in boys with dystrophinopathy on corticosteroids. Specifically, to see if L-arginine reduces muscle signal abnormalities on MRI done pre and post 30 days of L-arginine administration.