biology

Nifurtimox

Nifurtimox is a biology 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 Nifurtimox rather than just read about it. In short: Nifurtimox, sold under the brand name Lampit, is a medication used to treat Chagas disease and sleeping sickness. For sleeping sickness it is used together with eflornithine in nifurtimox-eflornithine combination treatment.

Key takeaways

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

Reference excerpt

Nifurtimox, sold under the brand name Lampit, is a medication used to treat Chagas disease and sleeping sickness. For sleeping sickness it is used together with eflornithine in nifurtimox-eflornithine combination treatment. In Chagas disease it is a second-line option to benznidazole. It is given by mouth. Common side effects include abdominal pain, headache, nausea, and weight loss. There are concerns from animal studies that it may increase the risk of cancer but these concerns have not been found in human trials. Nifurtimox is not recommended in pregnancy or in those with significant kidney or liver problems. It is a type of nitrofuran. Nifurtimox came into medication use in 1965. It is on the World Health Organization's List of Essential Medicines. It is not available commercially in Canada. It was approved for medical use in the United States in August 2020. In regions of the world where the disease is common nifurtimox is provided for free by the World Health Organization (WHO).

Medical uses Nifurtimox has been used to treat Chagas disease, when it is given for 30 to 60 days. However, long-term use of nifurtimox does increase chances of adverse events like gastrointestinal and neurological side effects. Due to the low tolerance and completion rate of nifurtimox, benznidazole is now being more considered for those who have Chagas disease and require long-term treatment. In the United States nifurtimox is indicated in children and adolescents (birth to less than 18 years of age and weighing at least 2.5 kilograms (5.5 lb) for the treatment of Chagas disease (American Trypanosomiasis), caused by Trypanosoma cruzi. Nifurtimox has also been used to treat African trypanosomiasis (sleeping sickness), and is active in the second stage of the disease (central nervous system involvement). When nifurtimox is given on its own, about half of all patients will relapse, but the combination of melarsoprol with nifurtimox appears to be efficacious. Trials are awaited comparing melarsoprol/nifurtimox against melarsoprol alone for African sleeping sickness. Combination therapy with eflornithine and nifurtimox is safer and easier than treatment with eflornithine alone, and appears to be equally or more effective. It has been recommended as first-line treatment for second-stage African trypanosomiasis.

Pregnancy and breastfeeding Use of nifurtimox should be avoided in pregnant women due to limited use. There is limited data shown that nifurtimox doses up to 15 mg/kg daily can cause adverse effects in breastfed infants. Other authors do not consider breastfeeding a contraindication during nifurtimox use.

Side effects Side effects occur following chronic administration, particularly in elderly people. Major toxicities include immediate hypersensitivity such as anaphylaxis and delayed hypersensitivity reaction involving icterus and dermatitis. Central nervous system disturbances and peripheral neuropathy may also occur. Most common side effects

anorexia weight loss nausea vomiting headache dizziness amnesia Less common effects

rash depression anxiety confusion fever sore throat chills seizures impotence tremors muscle weakness numbness of hands or feet

Contraindications Nifurtimox is contraindicated in people with severe liver or kidney disease, as well as people with a background of neurological or psychiatric disorders.

Mechanism of action Nifurtimox forms a nitro-anion radical metabolite that reacts with nucleic acids of the parasite causing significant breakdown of DNA. Its mechanism is similar to that proposed for the antibacterial action of metronidazole. Nifurtimox undergoes reduction and creates oxygen radicals such as superoxide. These radicals are toxic to T. cruzi. Mammalian cells are protected by presence of catalase, glutathione, peroxidases, and superoxide dismutase. Accumulation of hydrogen peroxide to cytotoxic levels results in parasite death.

Society and culture

Legal status Nifurtimox is licensed for use in Argentina, the United States, Turkey and Germany amongst others. It was approved for medical use in the United States in August 2020.

Names

Research Nifurtimox is in a phase-II clinical trial for the treatment of pediatric neuroblastoma and medulloblastoma.

References

External links "Nifurtimox". Drug Information Portal. U.S. National Library of Medicine. Archived from the original on March 18, 2020.

Illustrations

Worked examples

Example 1 — a first encounter with Nifurtimox

Start with the simplest possible case. Write down what Nifurtimox claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, 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 Nifurtimox 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 Nifurtimox 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 Nifurtimox

In research: Nifurtimox appears in biology 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 Nifurtimox 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: Nifurtimox is common in secondary-school and first-year university syllabi. It links to neighbouring topics Antiprotozoal agents, Chagas disease, Cyclic sulfones, so understanding it makes those chapters shorter.
In everyday life: Look for Nifurtimox 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 Nifurtimox in 20 minutes

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

Frequently asked questions

What is Nifurtimox in simple terms?

Why does Nifurtimox matter?

Because it connects several biology 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 Nifurtimox?

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 Nifurtimox.