
Tolebrutinib, which Sanofi acquired in a $3.7 billion buyout, failed a Phase 3 study in “primary progressive” multiple sclerosis and is facing a delayed U.S. approval decision in another form of the disease.

Tolebrutinib, which Sanofi acquired in a $3.7 billion buyout, failed a Phase 3 study in “primary progressive” multiple sclerosis and is facing a delayed U.S. approval decision in another form of the disease.