
Givinostat Receives Full FDA Approval for Duchenne Muscular Dystrophy
The approval follows fast track, orphan drug, and rare pediatric designations and an original Prescription Drug User Fee Act date of December 21, which the FDA pushed back to March 21 to have more time to review Italfarmaco’s application.
This article has been updated.
The FDA has approved givinostat (Duvyzat) from Italfarmaco, for use in boys 6 years and older who have all genetic variants of
Givinostat is a histone deacetylase (HDAC) inhibitor that works by blocking these enzymes from promoting muscle degeneration by preventing gene translation through changing the 3D folding of cell DNA. Inhibiting HDACs promotes muscle repair, reduces inflammation, and decreases both muscle fibrosis and fat accumulation in patients.3 It is the sixth targeted treatment approved by the FDA since 2016 for DMD, and the first nonsteroidal drug,1 joining eteplirsen (Exondys 51; Sarepta Therapeutics), golodirsen (Vyondys 53; Sarepta Therapeutics), casimersen (Amondys; Sarepta Therapeutics), viltolarsen (Viltepso; NS Pharma), and delandistrogene moxeparvovec-rokl (Elevidys; Sarepta Therapeutics).4
"DMD denies the opportunity for a healthy life to the children it affects," Emily Freilich, MD, director, Division of Neurology, Office of Neuroscience in the FDA’s Center for Drug Evaluation and Research,
Italfarmaco’s new drug application for givinostat was originally accepted by the FDA and given priority review status on June 29, 2023,5 meaning the agency recognized the therapy’s potential to produce significant improvement in patients who have DMD,3 which is both the most common and most severe form of hereditary muscular dystrophy and the most common hereditary neuromuscular disease.6,7
Givinostat was investigated in the phase 3 randomized double-blind placebo-controlled multicenter EPIDYS trial (
Compared with those who received placebo, the boys who received givinostat took 1.78 fewer seconds to perform the functional task of climbing 4 stairs (P = .0345). Also, fat infiltration in the vastus lateralis was delayed by approximately 30% compared with placebo (nominal P = .035). Common adverse events—occurring in at least 10% of participants—were diarrhea, abdominal pain, thrombocytopenia, hypertriglyceridemia, platelet decrease, and triglyceride increase, and there were no new safety signals.2
Final EPIDYS study data published recently in
Along with the approval came guidance to conduct a baseline assessment of patient platelet count and triglycerides and to monitor each throughout treatment for potential dosage changes; the current recommended dosage is determined by the patient's weight, and the medication should be given twice daily with food. Contraindications exist for patients with a platelet count below 150 x 109/L, who have certain types of heart disease, or who are taking medications that may cause QTc prolongation, as this is also a potential adverse effect of givinostat that can lead to an irregular heartbeat. Moderate or severe diarrhea may also necessitate dosage modification.1
There is no known cure for DMD. All treatments are considered palliative.6
References
- FDA approves nonsteroidal treatment for Duchenne muscular dystrophy. News release. FDA. March 21,2024. Accessed March 21, 2024.
https://www.fda.gov/news-events/press-announcements/fda-approves-nonsteroidal-treatment-duchenne-muscular-dystrophy - Meglio M. FDA extends review time for Italfarmaco’s Duchenne agent givinostat. NeurologyLive®. November 30, 2023. Accessed March 18, 2024.
https://www.neurologylive.com/view/fda-extends-review-time-italfarmaco-duchenne-agent-givinostat - Lobo A. FDA gives priority review to oral givinostat in treating DMD. Muscular Dystrophy News Today. July 6, 2023. Accessed March 18, 2024.
https://musculardystrophynews.com/news/fda-gives-priority-review-oral-givinostat-dmd-treatment/ - Shaw M. Experts issue call for reform to DMD drug pricing, trial approval process. The American Journal of Managed Care®. March 14, 2024. Accessed March 18, 2024.
https://www.ajmc.com/view/experts-issue-call-for-reform-to-dmd-drug-pricing-trial-approval-process - Italfarmaco group completes FDA submission of new drug application for givinostat in Duchenne muscular dystrophy and receives priority review. News release. BusinessWire. June 29, 2023. Accessed March 18, 2024.
https://www.businesswire.com/news/home/20230629900551/en/Italfarmaco-Group-Completes-FDA-Submission-of-New-Drug-Application-for-Givinostat-in-Duchenne-Muscular-Dystrophy-and-Receives-Priority-Review - Venugopal V, Pavlakis S. Duchenne muscular dystrophy. StatPearls. StatPearls Publishing; 2024.
https://www.ncbi.nlm.nih.gov/books/NBK482346/#:~:text=Unfortunately%2C%20Duchenne%20muscular%20dystrophy%20(DMD,available%20treatment%20options%20are%20palliative - Office of Communications. What are the types and symptoms of muscular dystrophy (MD)? Eunice Kennedy Shriver National Institute of Child Health and Human Development. Accessed March 18, 2024.
https://www.nichd.nih.gov/health/topics/musculardys/conditioninfo/types#:~:text=Duchenne%20MD%20(DMD),of%20age%2C%20and%20progresses%20rapidly - Clinical study to evaluate the efficacy and safety of givinostat in ambulant patients with Duchenne muscular dystrophy. ClinicalTrials.gov. Updated February 2, 2022.Accessed March 18, 2024.
https://www.clinicaltrials.gov/study/NCT02851797 - Henzi BC, Schmidt S, Nagy S. Safety and efficacy of givinostat in boys with Duchenne muscular dystrophy (EPIDYS): a multicentre, randomized, double-blind, placebo-controlled, phase 3 trial. Lancet Neurol. 2023;22(10):890-899. doi:10.1016/S1474-4422(23)00285-5
- Italfarmaco announces positive topline data from phase 3 trial showing beneficial effect of givinostat in Duchenne. News release. Parent Project Muscular Dystrophy. June 26, 2022. Accessed March 18, 2024.
https://www.parentprojectmd.org/italfarmaco-group-announces-positive-topline-data-from-phase-3-trial-showing-beneficial-effect-of-givinostat-in-duchenne/ - Italfarmaco Group announces positive topline data from phase 3 trial showing beneficial effect of givinostat in patients with Duchenne muscular dystrophy. News release. BusinessWire. June 25, 2022. Accessed March 18, 2024.
https://www.businesswire.com/news/home/20220625005001/en/Italfarmaco-Group-Announces-Positive-Topline-Data-from-Phase-3-Trial-Showing-Beneficial-Effect-of-Givinostat-in-Patients-with-Duchenne-Muscular-Dystrophy - Results from Italfarmaco pivotal phase 3 EPIDYS study of givinostat in Duchenne muscular dystrophy (DMD) published in The Lancet Neurology. News release. Italfarmaco. March 19, 2024. Accessed March 19, 2024.
https://www.businesswire.com/news/home/20240319626593/en/Results-from-Italfarmaco-Pivotal-Phase-3-EPIDYS-Study-of-Givinostat-in-Duchenne-Muscular-Dystrophy-DMD-Published-in-The-Lancet-Neurology
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