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The Boston Globe

Business

Report slams Genzyme’s MS drug on eve of hearing

The future of a key multiple sclerosis drug developed by Cambridge biotech Genzyme was put in doubt Friday after federal regulators suggested it could be too dangerous to approve because of what they believe are the treatment’s limited benefits.

The drug, Lemtrada, was pivotal to sealing French drug maker Sanofi SA’s $20.1 billion purchase of Genzyme Corp. in 2011. Sanofi is counting on it and other new treatments to rejuvenate the global drug giant’s sales.

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