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DALIRESP™ (roflumilast) tablet

Mechanism of Action
Roflumilast and its active metabolite (roflumilast N-oxide) are selective inhibitors of phosphodiesterase 4 (PDE4). Roflumilast and roflumilast N-oxide inhibition of PDE4 (a major cyclic-3',5'-adenosine monophosphate (cyclic AMP)-metabolizing enzyme in lung tissue) activity leads to accumulation of intracellular cyclic AMP. While the specific mechanism(s) by which DALIRESP exerts its therapeutic action in COPD patients is not well defined, it is thought to be related to the effects of increased intracellular cyclic AMP in lung cells.

DALIRESP™ is indicated as a treatment to reduce the risk of COPD exacerbations in patients with severe COPD associated with chronic bronchitis and a history of exacerbations.

Limitations of Use
DALIRESP is not a bronchodilator and is not indicated for the relief of acute bronchospasm.

The recommended dose of DALIRESP is one 500 microgram (mcg) tablet per day, with or without food.

DALIRESP is supplied as white to off-white, round tablets, embossed with 'D' on one side and '500' on the other side. Each tablet contains 500 mcg of roflumilast


National Institutes of Health, U.S. National Library of Medicine, DailyMed Database.
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phosphodiesterase 4 (PDE4) inh