biology

Piperaquine/dihydroartemisinin

Piperaquine/dihydroartemisinin 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 Piperaquine/dihydroartemisinin rather than just read about it. In short: Piperaquine/dihydroartemisinin (DHA/PPQ), sold under the brand name Eurartesim among others, is a fixed dose combination medication used in the treatment of malaria. It is a combination of piperaquine and dihydroartemisinin.

Key takeaways

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

Reference excerpt

Piperaquine/dihydroartemisinin (DHA/PPQ), sold under the brand name Eurartesim among others, is a fixed dose combination medication used in the treatment of malaria. It is a combination of piperaquine and dihydroartemisinin. Specifically it is used for malaria of the P. falciparum and P. vivax types. It is taken by mouth. Side effects are uncommon. Concerns include the possibility of QT prolongation. Versions are available for use in children. Use in early pregnancy is not recommended. The two medications work by different mechanisms. Piperaquine/dihydroartemisinin was approved for medical use in Europe in 2011. The combination is on the World Health Organization's List of Essential Medicines. It is commercially available in Africa and Asia. It has been used to treat more than 4.5 million people as of 2017.

Pharmacology Dihydroartemisinin (also known as dihydroqinghaosu, artenimol or DHA) is a drug used to treat malaria. Dihydroartemisinin is the active metabolite of all artemisinin compounds (artemisinin, artesunate, artemether, etc.) and is also available as a drug in itself. It is a semi-synthetic derivative of artemisinin and is widely used as an intermediate in the preparation of other artemisinin-derived antimalarial drugs. Piperaquine is an antimalarial drug, a bisquinoline first made in the 1960s, and used extensively in China and Indochina as prophylaxis and treatment during the next 20 years. Usage declined in the 1980s as piperaquine-resistant strains of P. falciparum arose and artemisinin-based antimalarials became available. The combination dihydroartemisinin-piperaquine is an effective antimalarial that is used widely around the world. In South-East Asia, where resistance has emerged towards both artemisinin and piperaquine, the combination is being trialed with a third drug, namely mefloquine. Piperaquine is characterized by slow absorption and a long biological half-life, making it a good partner drug with artemisinin derivatives which are fast acting but have a short biological half-life.

Society and culture This product is available in the market of several countries:

Artekin (Holleykin) Eurartesim (Alfasigma; by Good Manufacturing Practices) DHP Frimal (Mersifarma TM) Diphos (Genix Pharma) Timequin (SAMI Pharma ) Duocotecxin (Holley Pharm) Malacur (Elder Pharmaceuticals for SALVAT Laboratories) Ridmal (Ajanta Pharma Limited)

References

External links "Dihydroartemisinin mixture with piperaquine". Drug Information Portal. U.S. National Library of Medicine. Archived from the original on August 6, 2020. "Dihydroartemisinin mixture with piperaquine tetraphosphate". Drug Information Portal. U.S. National Library of Medicine. Archived from the original on August 6, 2020.

Worked examples

Example 1 — a first encounter with Piperaquine/dihydroartemisinin

Start with the simplest possible case. Write down what Piperaquine/dihydroartemisinin 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 Piperaquine/dihydroartemisinin 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 Piperaquine/dihydroartemisinin 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 Piperaquine/dihydroartemisinin

In research: Piperaquine/dihydroartemisinin 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 Piperaquine/dihydroartemisinin 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: Piperaquine/dihydroartemisinin is common in secondary-school and first-year university syllabi. It links to neighbouring topics Drugs acting on the blood and blood forming organs, World Health Organization essential medicines, so understanding it makes those chapters shorter.
In everyday life: Look for Piperaquine/dihydroartemisinin 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 Piperaquine/dihydroartemisinin in 20 minutes

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

Frequently asked questions

What is Piperaquine/dihydroartemisinin in simple terms?

Why does Piperaquine/dihydroartemisinin 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 Piperaquine/dihydroartemisinin?

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 Piperaquine/dihydroartemisinin.