Safety and Tolerability of Givinostat: Evidence From Real‐World and Clinical Practice

ABSTRACT Objective The aim of our study was to establish the prevalence of adverse events in a real‐world setting in boys living with Duchenne muscular dystrophy (DMD) treated with givinostat as part of an Expanded Access Program (EAP) in Italy. Methods The cohort included 90 ambulant boys, with age when treatment started between 6 and 23 years (mean 10.1 years, SD: 3.2 years) and with a follow up between 6.0 and 14.6 months (mean 10.6 months; SD 2.6 months). Results Platelets count decrease and triglyceride levels increase were the most common adverse events, followed by diarrhea. A dose reduction was needed in 38 of the 90 boys following thrombocytopenia ( n = 34), diarrhea ( n = 2), and hypertriglyceridemia ( n = 4), with two of the boys presenting both thrombocytopenia and hypertriglyceridemia. Eleven of the 38 boys with initial dose reduction (10 with thrombocytopenia and 1 with hypertriglyceridemia) required an additional dose reduction for persistence of values outside the threshold, with one of them discontinuing treatment because of persistent hypertriglyceridemia even with the lowest dose. Interpretation Our results confirm the safety profile observed in the pivotal study providing further evidence of the management of the drug in a real‐world setting. In our experience, treatment with givinostat was well managed by maintaining a strict monitoring. This was facilitated by allowing families to perform blood tests in local labs, reducing the stress and burden of frequent visits to the hospital.