Mer­ck KGaA's BTK in­hibitor hit by par­tial clin­i­cal hold over safe­ty con­cern, but PhI­II read­out un­af­fect­ed

The FDA has slapped a par­tial clin­i­cal hold on Mer­ck KGaA’s evo­bru­ti­nib due to wor­ries about liv­er in­jury aris­ing from its Phase III stud­ies in mul­ti­ple scle­ro­sis.

Mer­ck KGaA has long held up evo­bru­ti­nib as a lead­ing can­di­date in the race to bring a BTK in­hibitor to the MS space. Un­der the hold, the Ger­man drug­mak­er will not be able to start new pa­tients on the drug or dose pa­tients who have less than 70 days’ ex­po­sure to it in the US.

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