LONDON, Dec. 11 -- The government of the United Kingdom issued the following news:
The Medicines and Healthcare products Regulatory Agency (MHRA)has today (11 December 2025) approved the medicine mirdametinib (Ezmekly) for the treatment of plexiform neurofibromasin adultsandadolescents. Itis the first treatmentfor children as young as 2 yearsoldwith a genetic condition called neurofibromatosis type 1 (NF1).
NF1isarare genetic conditionthatcan cause tumours to form on nerves throughout the body.Thesetumours, known asplexiform neurofibromas,may grow and press on nearby tissues, sometimes causing pain or problems with dailyactivities.
Mirdametinibworks by blocking certain signals in the body that would otherwise allow these tumours to grow.Itis available as a dispersible tablet, whichcan be swallowed whole or dissolved in water. Thismakesit suitable for patients unable or unwilling to swallow a capsuleandparticularly suitableforchildren under 6 years of age.
Julian Beach, MHRA Interim Executive Director, Healthcare Quality and Access, said:
"The approval ofmirdametinibprovides the firsttreatmentfor NF1 that can be used forchildren agedas young as2 years and older.Keeping patients safe and enabling their access to high quality, safe and effective medical products are key priorities for us.
"As with all licensed medicines, we will continue to monitor its safety and effectiveness closely."
A full list of side effects can be found in the Patient Information Leaflet (PIL) or the Summary of Product Characteristics (SmPC), which will be published on the MHRA website within 7 days of approval.
Anyone who suspects they are having a side effect from this medicine are encouraged to talk to their doctor, pharmacist or nurse and report it directly to the Yellow Card scheme, either through the website(https://yellowcard.mhra.gov.uk/) or by searching the Google Play or Apple App stores for MHRA Yellow Card.
Notes to editors
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Marketing authorisation approval was granted on 11 December 2025 to SpringWorks Theraputics Ireland Limited.
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Atthe time of approval, only one medicine was authorised in the UK for plexiform neurofibromas in patients aged three years and older with NF1. Mirdametinib provides an additional treatment option and has been shown to be effective in patients from a slightly younger age, starting at2yearsof age.
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More information can be found in the Summary of Product Characteristics and Patient Information Leaflets which will be published on the MHRA Products website within 7 days of approval.
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The Medicines and Healthcare products Regulatory Agency (MHRA)is responsible forregulating all medicines and medical devices in the UK by ensuring they work and are acceptably safe.
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The MHRA is an executive agency of the Department of Health and Social Care.
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For media enquiries, please contact newscentre@mhra.gov.uk or call 020 3080 7651.
Disclaimer: Curated by HT Syndication.
