Merck KGaA’s Phase III Bruton's tyrosine kinase (BTK) inhibitor asset evobrutinib for multiple sclerosis (MS) has been put on partial clinical hold by the US Food and Drug Administration after liver events, increasing concerns over a possible class safety effect.
Clinical Hold For Merck KGaA’s BTK Inhibitor Evobrutinib For MS Raises Class Safety Fears
Third To Be Hit With MS Clinical Hold
Adding to a growing pattern within the BTK inhibitor pipeline for multiple sclerosis, the US FDA has placed Merck’s evobrutinib on a partial clinical hold following two liver injury incidents, prompting questions over its ultimate approvability.

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