MHRA approves Ezmekly to treat plexiform neurofibromas

12 December 2025

The UK Medicines and Healthcare products Regulatory Agency (MHRA) has approved Ezmekly (mirdametinib) for the treatment of plexiform neurofibromas in adults and adolescents.

The marketing authorization approval was granted to SpringWorks Therapeutics, which is now owned by Merck KGaA (MRK: DE) under a $3.4 billion deal that closed in July.

It is the first treatment for children as young as 2 years old with a genetic condition called neurofibromatosis type 1 (NF1), the MHRA noted.

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