Paul Hudson, Sanofi CEO (Eric Piermont/AFP via Getty Images)

Sanofi scraps top­i­cal BTK drug from $3.7B Prin­cip­ia buy­out

Sanofi is sweep­ing a can­di­date from its $3.7 bil­lion Prin­cip­ia buy­out out of the pipeline, rais­ing new ques­tions about the BTK fran­chise.

The com­pa­ny is …

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