INTRODUCTION: In this study we performed an open-label, pilot study of an orally administered liquid formulation of immediate-release pentoxifylline (PTX) on patients with Duchenne muscular dystrophy (DMD). Treatment efficacy, safety, and tolerability were assessed. METHODS: The tolerability and safety of PTX and measures of muscle strength and function were evaluated during 12 months of treatment. RESULTS: Seventeen boys with DMD, between 4 and 8 years of age, were enrolled at one of five Cooperative International Neuromuscular Research Group (CINRG) centers. Only 9 were able to complete the 12-month PTX treatment phase; the primary reason for discontinuation was adverse events. Intolerable gastrointestinal side effects were experienced by 65% of participants. Two participants had severe leukopenia that resolved with medication withdrawal. CONCLUSIONS: Open-label treatment with a liquid formulation of immediate-release PTX resulted in a high incidence of adverse events in boys with DMD. Poor tolerability of this PTX formulation precluded adequate assessment of efficacy.
INTRODUCTION: In this study we performed an open-label, pilot study of an orally administered liquid formulation of immediate-release pentoxifylline (PTX) on patients with Duchenne muscular dystrophy (DMD). Treatment efficacy, safety, and tolerability were assessed. METHODS: The tolerability and safety of PTX and measures of muscle strength and function were evaluated during 12 months of treatment. RESULTS: Seventeen boys with DMD, between 4 and 8 years of age, were enrolled at one of five Cooperative International Neuromuscular Research Group (CINRG) centers. Only 9 were able to complete the 12-month PTX treatment phase; the primary reason for discontinuation was adverse events. Intolerable gastrointestinal side effects were experienced by 65% of participants. Two participants had severe leukopenia that resolved with medication withdrawal. CONCLUSIONS: Open-label treatment with a liquid formulation of immediate-release PTX resulted in a high incidence of adverse events in boys with DMD. Poor tolerability of this PTX formulation precluded adequate assessment of efficacy.
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