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In an unusual move, two of the world’s biggest drug makers — Bristol-Myers Squibb (BMY) and Sanofi (SNY) — filed a lawsuit accusing the Hawaii attorney general of violating their free speech rights by insisting they include certain cautionary statements about the Plavix blood thinner in product labeling.

At issue is language about the effectiveness of the medication in East Asian and Pacific Islanders, who constitute roughly half of Hawaii’s population. A lawsuit filed by the state in 2014 alleged the drug makers, which once jointly marketed the drug, failed to include data that indicated Plavix would not work for people in those groups.

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