(Reuters)—Ironwood Pharmaceuticals Inc. said on Monday the U.S. Food and Drug Administration (FDA) approved its oral drug to treat a condition associated with gout. The company’s once-daily drug, Duzallo (lesinurad and allopurinol), was approved to treat hyperuricemia in patients with gout, Ironwood said. Duzallo combines the standard-of-care treatment, allopurinol, with Ironwood’s lesinurad to treat inefficient…