chemistry

Roflumilast

Roflumilast is a chemistry topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Roflumilast rather than just read about it. In short: Roflumilast, sold under the brand name Daxas among others, is a medication used for the treatment of chronic obstructive pulmonary disease, plaque psoriasis, seborrheic dermatitis, and atopic dermatitis. It acts as a selective, long-acting inhibitor of the enzyme phosphodiesterase-4 (PDE-4).

Key takeaways

Roflumilast belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Roflumilast to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Roflumilast from memory before moving on to harder problems.

Reference excerpt

Roflumilast, sold under the brand name Daxas among others, is a medication used for the treatment of chronic obstructive pulmonary disease, plaque psoriasis, seborrheic dermatitis, and atopic dermatitis. It acts as a selective, long-acting inhibitor of the enzyme phosphodiesterase-4 (PDE-4). It has anti-inflammatory effects. It was approved for medical use in the European Union in 2010, in the United States in 2011, and in Canada in 2017. It is available as a generic medication.

Medical uses Roflumilast is indicated for the treatment of severe chronic obstructive pulmonary disease (COPD), plaque psoriasis, seborrheic dermatitis, and atopic dermatitis, It is used in the prevention of exacerbations (lung attacks) in severe chronic obstructive pulmonary disease (COPD).

Adverse effects Common (1–10% incidence) adverse effects include diarrhea, weight loss, nausea, headache, insomnia, decreased appetite, abdominal pain, rhinitis, sinusitis, urinary tract infection, and depression.

Society and culture

Legal status In June 2010, an oral formulation of roflumilast was approved in the European Union for severe COPD associated with chronic bronchitis. In February 2011, it gained FDA approval in the United States for reducing COPD exacerbations. In July 2022, the FDA approved roflumilast cream 0.3% (Zoryve) for the treatment of plaque psoriasis in patients 12 years of age and older. In December 2023, the agency approved a 0.3% topical foam formulation for seborrheic dermatitis in patients aged nine and older, marking the first new mechanism of action for the condition in over two decades. In July 2024, the FDA approved a 0.15% cream formulation as a once-daily treatment for mild to moderate atopic dermatitis in adults and children aged six and older. In May 2025, the 0.3% foam formulation received further approval for plaque psoriasis in adults and adolescents aged 12 and older. Subsequently, in October 2025, the FDA extended approval of a 0.05% cream formulation to include pediatric patients aged two to five with atopic dermatitis.

References

Further reading Hohlfeld JM, Schoenfeld K, Lavae-Mokhtari M, Schaumann F, Mueller M, Bredenbroeker D, et al. (August 2008). "Roflumilast attenuates pulmonary inflammation upon segmental endotoxin challenge in healthy subjects: a randomized placebo-controlled trial" (PDF). Pulmonary Pharmacology & Therapeutics. 21 (4): 616–23. doi:10.1016/j.pupt.2008.02.002. PMID 18374614. Archived (PDF) from the original on 28 August 2019. Retrieved 24 June 2019.

Illustrations

Worked examples

Example 1 — a first encounter with Roflumilast

Start with the simplest possible case. Write down what Roflumilast claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Roflumilast before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Roflumilast ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Roflumilast

In research: Roflumilast appears in chemistry research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Roflumilast in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Roflumilast is common in secondary-school and first-year university syllabi. It links to neighbouring topics Benzamides, Chloropyridines, Cyclopropyl compounds, so understanding it makes those chapters shorter.
In everyday life: Look for Roflumilast outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Roflumilast in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Roflumilast means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Roflumilast out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Roflumilast in simple terms?

Why does Roflumilast matter?

Because it connects several chemistry ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Roflumilast?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Roflumilast.