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FDA Approves Novel Fixed-Dose Combo Treatment for Gout

FDA Approves Novel Fixed-Dose Combo Treatment for Gout

U.S. Food and Drug Administration (FDA) approved DUZALLO(lesinurad and allopurinol) as a once-daily oral treatment for hyperuricemia associated with gout in patients who have not achieved target serum uric acid (sUA) levels with a medically appropriate daily dose of allopurinol alone. DUZALLO is not recommended for the treatment of asymptomatic hyperuricemia. DUZALLO is the first drug that combines the current standard of care for the treatment of hyperuricemia associated with gout, allopurinol, with the most recent FDA-approved treatment for this condition, lesinurad. This fixed-dose combination provides a dual mechanism of action in a single tablet that can address both underlying causes of hyperuricemia – overproduction and underexcretion of serum uric acid.

Gout is a highly symptomatic and painful form of inflammatory arthritis caused by hyperuricemia, or elevated sUA levels in the blood, which can lead to painful flares and serious potential long-term health consequences.

“The approval of DUZALLO provides a new fixed-dose and dual-mechanism treatment option to help patients with uncontrolled gout achieve target serum uric acid levels. This represents an important and needed new option in the treatment of hyperuricemia,” said Michael A. Becker, M.D., professor emeritus of medicine, Department of Medicine, The University of Chicago, Chicago, IL. “Gout is a serious and potentially progressive and debilitating inflammatory disease. Getting patients with gout to serum urate goal, and keeping them at or below goal, are essential to success in treating these patients. DUZALLO will help reduce the significant unmet need among patients in the U.S. who fail to get their serum uric acid levels to goal despite taking allopurinol alone.”

“With DUZALLO, nearly twice as many patients with uncontrolled gout may be able to achieve target serum uric acid levels compared to those patients taking allopurinol alone, which is important, considering the significant unmet need among uncontrolled gout patients to get to goal of under 6 mg/dL,” said Tom McCourt, senior vice president of marketing and sales and chief commercial officer at Ironwood. “We believe DUZALLO will be the critical driver behind Ironwood’s gout franchise, which is expected to exceed total annual U.S. peak sales of $300 million.”

An AstraZeneca subsidiary, Ardea Biosciences, submitted the Duzallo New Drug Application (NDA) to the FDA..The FDA approval of DUZALLO was based on the clinical program supporting the ZURAMPIC® (lesinurad) new drug application (NDA) and a pharmacokinetic study that evaluated the bioequivalence of the fixed-dose combination of lesinurad and allopurinol compared to co-administration of separate lesinurad and allopurinol tablets. The efficacy and safety of lesinurad plus allopurinol were demonstrated in two pivotal Phase III clinical trials, CLEAR 1 (n=402) and CLEAR 2 (n=410), which supported the ZURAMPIC NDA. In clinical trials of adult patients with gout who failed to achieve target sUA levels on allopurinol alone, lesinurad in combination with allopurinol nearly doubled the number of patients who achieved sUA target of <6 mg/dL at month 6, reduced the mean sUA level to <6 mg/dL by month 1 and maintained that level through month 12. The most common adverse reactions in clinical trials were headache, influenza, higher levels of blood creatinine (a measure of kidney function), and heartburn (acid reflux). DUZALLO has a boxed warning regarding the risk of acute renal failure.

Ironwood expects DUZALLO to be commercially available early in the fourth quarter of 2017.

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