Pfizer ulcerative colitis drug leads to remission in a third of patients -study

Nearly one third of patients with ulcerative colitis who received an experimental Pfizer Inc (PFE.N) drug in a clinical trial were in remission after a year of treatment, the drugmaker said on Tuesday.

The drug, etrasimod, was the key asset Pfizer picked up in its $6.7 billion deal for Arena Pharmaceuticals last year. Analysts have estimated that peak sales could top $3 billion a year.