Study of Daily Pentoxifylline as a Rescue Treatment in Duchenne Muscular Dystrophy

"Participants will be randomized to receive either pentoxifylline or placebo in addition to their stable steroid therapy. Active drug and placebo preparations will be supplied as gel capsules of identical size, appearance and taste. Active drug capsules will contain one 400 mg time-release pentoxifylline tablet and inert filler. Placebo capsules will contain inert filler.~Based on weight at screening, \<30 mg will receive 1 400 capsule/day; 30-49 kg will receive two 400 capsules/day; 50 kg or greater will receive three 400 mg capsules/day."