US FDA delays Merck KGaA's filing on MS drug cladribine
In a move that will delay the approval of German drug major Merck KGaA's multiple sclerosis drug cladribine, the US Food and Drug Administration has issued a 'refuse to file' letter on the firm's New Drug Application for the compound as a therapy for relapsing forms of MS.
Merck's shares fell 4.5% to 62.54 euros by 14.00 GMT on November 30, the leading decliner among German blue chips stocks.
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