chemistry

Naftidrofuryl

Naftidrofuryl 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 Naftidrofuryl rather than just read about it. In short: Naftidrofuryl, also known as nafronyl and sold under the brand name Praxilene among others, is a serotonin 5-HT2 receptor antagonist which is used as a vasodilator in the treatment of peripheral and cerebral vascular disorders. It is taken orally.

Key takeaways

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

Reference excerpt

Naftidrofuryl, also known as nafronyl and sold under the brand name Praxilene among others, is a serotonin 5-HT2 receptor antagonist which is used as a vasodilator in the treatment of peripheral and cerebral vascular disorders. It is taken orally.

Medical uses Naftidrofuryl is used as a vasodilator in the treatment of peripheral and cerebral vascular disorders. It is also licensed for the treatment of intermittent claudication due to peripheral arterial disease. Historically, it has been used to treat sudden idiopathic hearing loss and acute tinnitus. Naftidrofuryl may be effective for relieving the pain of muscle cramps.

Adverse effects Naftidrofuryl has been associated with nausea, abdominal pain, and rash. Rarely, hepatitis and liver failure have been reported.

Pharmacology

Pharmacodynamics Naftidrofuryl acts as a selective antagonist of 5-HT2 receptors (with action as an inverse agonist of the 5-HT2A receptor specifically characterized).

Pharmacokinetics The oral bioavailability of naftidrofuryl is 20 to 78% in different studies. Its time to peak levels is 0.8 to 1.0 hours. There is some evidence that naftidrofuryl crosses the blood–brain barrier and penetrates into the central nervous system. The drug's plasma protein binding is 80%. It is metabolized in the liver. The elimination half-life of naftidrofuryl is 1.2 to 2 hours. Its half-life is longer in the elderly than in younger people. The drug's duration of effects is 2 to 3 hours and closely parallels circulating levels of naftidrofuryl.

History Naftidrofuryl was first described in the scientific literature by at least 1966.

Society and culture

Names Naftidrofuryl is the generic name of the drug and its (INNTooltip International Nonproprietary Name, BANTooltip British Approved Name, DCFTooltip Dénomination Commune Française, and JANTooltip Japanese Accepted Name. It is also known as naftidrofurile (DCITTooltip Denominazione Comune Italiana) or as nafronyl (USANTooltip United States Adopted Name. Naftidrofuryl is marketed under a variety of trade names, including Artocoron, Azunaftil, Di-Actane, Dusodril, Enelbin, Frilix, Gevatran, Iridus, Iridux, Luctor, Nafti, Naftilong, Naftodril, Nafoxal, Praxilene, Sodipryl Retard, Stimlor, and Vascuprax, among others.

Availability Naftidrofuryl is marketed and used widely throughout the world.

See also Serotonin 5-HT2A receptor antagonist Irindalone Ketanserin Sarpogrelate

References

Illustrations

Worked examples

Example 1 — a first encounter with Naftidrofuryl

Start with the simplest possible case. Write down what Naftidrofuryl 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 Naftidrofuryl 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 Naftidrofuryl 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 Naftidrofuryl

In research: Naftidrofuryl 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 Naftidrofuryl 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: Naftidrofuryl is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1-Naphthyl compounds, 5-HT2A antagonists, 5-HT2 antagonists, so understanding it makes those chapters shorter.
In everyday life: Look for Naftidrofuryl 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 Naftidrofuryl in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Naftidrofuryl 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 Naftidrofuryl out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Naftidrofuryl in simple terms?

Why does Naftidrofuryl 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 Naftidrofuryl?

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 Naftidrofuryl.