chemistry

Rosiglitazone

Rosiglitazone 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 Rosiglitazone rather than just read about it. In short: Rosiglitazone (trade name Avandia) is an antidiabetic drug in the thiazolidinedione class. It works as an insulin sensitizer, by binding to the PPAR in fat cells and making the cells more responsive to insulin.

Key takeaways

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

Reference excerpt

Rosiglitazone (trade name Avandia) is an antidiabetic drug in the thiazolidinedione class. It works as an insulin sensitizer, by binding to the PPAR in fat cells and making the cells more responsive to insulin. It is marketed by the pharmaceutical company GlaxoSmithKline (GSK) as a stand-alone drug or for use in combination with metformin or with glimepiride. First released in 1999, annual sales peaked at approximately $2.5 billion in 2006; however, following a meta-analysis in 2007 that linked the drug's use to an increased risk of heart attack, sales plummeted to just $9.5 million in 2012. The drug's patent expired in 2012. It was patented in 1987 and approved for medical use in 1999. Despite rosiglitazone's effectiveness at decreasing blood sugar in type 2 diabetes mellitus, its use decreased dramatically as studies showed apparent associations with increased risks of heart attacks and death. Adverse effects alleged to be caused by rosiglitazone were the subject of over 13,000 lawsuits against GSK; as of July 2010, GSK had agreed to settlements on more than 11,500 of these suits. Some reviewers recommended rosiglitazone be taken off the market, but an FDA panel disagreed, and it remains available in the US. From November 2011 until November 2013, the US federal government did not allow Avandia to be sold without a prescription from a certified doctor; moreover, patients were required to be informed of the risks associated with its use, and the drug had to be purchased by mail order through specified pharmacies. In 2013, the FDA lifted its earlier restrictions on rosiglitazone after reviewing the results of a 2009 trial which failed to show increased heart attack risk. In Europe, the European Medicines Agency (EMA) recommended in September 2010 that the drug be suspended because the benefits no longer outweighed the risks. It was withdrawn from the market in the UK, Spain and India in 2010, and in New Zealand and South Africa in 2011.

Medical uses Rosiglitazone was approved for glycemic control in people with type 2 diabetes, as measured by glycated haemoglobin A1c (HbA1c) as a surrogate endpoint, similar to that of other oral antidiabetic drugs. The controversy over adverse effects has dramatically reduced the use of rosiglitazone. Published studies did not provide evidence that outcomes like mortality, morbidity, adverse effects, costs and health-related quality of life are positively influenced by rosiglitazone.

Adverse effects

Heart failure One of the safety concerns identified before approval was fluid retention. Moreover, the combination of rosiglitazone with insulin resulted in a higher rate of congestive heart failure. In Europe there were contraindications for use in heart failure and combination with insulin. A meta analysis of all trials from 2010 and 2019 confirmed a higher risk of heart failure and a double risk when rosiglitazone was administered as add-on therapy to insulin. Two meta-analyses of real life cohort studies found a higher risk of heart failure compared to pioglitazone. There were 649 excess cases of heart failure every 100,000 patients who received rosiglitazone rather than pioglitazone.

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with Rosiglitazone

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

In research: Rosiglitazone 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 Rosiglitazone 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: Rosiglitazone is common in secondary-school and first-year university syllabi. It links to neighbouring topics 2-Pyridyl compounds, 3β-Hydroxysteroid dehydrogenase inhibitors, CYP17A1 inhibitors, so understanding it makes those chapters shorter.
In everyday life: Look for Rosiglitazone 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 Rosiglitazone in 20 minutes

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

Frequently asked questions

What is Rosiglitazone in simple terms?

Why does Rosiglitazone 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 Rosiglitazone?

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 Rosiglitazone.