science

Pioglitazone

Pioglitazone is a science 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 Pioglitazone rather than just read about it. In short: Pioglitazone, sold under the brand name Actos among others, is an anti-diabetic medication used to treat type 2 diabetes. It may be used with metformin, a sulfonylurea, or insulin.

Key takeaways

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

Reference excerpt

Pioglitazone, sold under the brand name Actos among others, is an anti-diabetic medication used to treat type 2 diabetes. It may be used with metformin, a sulfonylurea, or insulin. Use is recommended together with exercise and diet. It is not recommended in type 1 diabetes. It is taken by mouth. Common side effects include headaches, muscle pains, inflammation of the throat, and swelling. Serious side effects may include bladder cancer, low blood sugar, heart failure, and osteoporosis. Use is not recommended in pregnancy or breastfeeding. It is in the thiazolidinedione (TZD) class and works by improving sensitivity of tissues to insulin. Pioglitazone was patented in 1985, and came into medical use in 1999. It is available as a generic medication. In 2023, it was the 133rd most commonly prescribed medication in the United States, with more than 4 million prescriptions. It was withdrawn in France and Germany in 2011.

Medical uses Pioglitazone is used to lower blood glucose levels in type 2 diabetes either alone or in combination with sulfonylurea, metformin, or insulin. The effects of pioglitazone have been compared in a Cochrane systematic review to that of other blood sugar lowering-medicine, including metformin, acarbose, and repaglinide, as well as with appropriate diet and exercise, not showing any benefit in reducing the chance of developing type 2 diabetes in people at risk. It did, however, show reduction of risk of developing type 2 diabetes when compared to a placebo or to no treatment. These results should be interpreted considering that most of the data of the studies included in this review were of low or very-low certainty. While pioglitazone does decrease blood sugar levels, the main study that looked at the medication found no difference in the main cardiovascular outcomes that were looked at. The secondary outcome of death from all causes, myocardial infarction, and stroke were lower. Pioglitazone has been found to reduce all-cause mortality in type 2 diabetic patients compared to other therapies, with a 60% reduction in mortality in those exposed to pioglitazone, compared to those never exposed. Another study found an all-cause mortality hazard ratio of 0.33 for pioglitazone after adjusting for >40 covariates, compared to insulin. Due to insufficient data on all-cause mortality, cardiovascular mortality, myocardial infarction and stroke, this was not possible to compare in a more recent review.

Contraindications Pioglitazone cannot be used in patients with a known hypersensitivity to pioglitazone, other thiazolidinediones or any of the components of its pharmaceutical forms. It is ineffective and possibly harmful in diabetes mellitus type 1 and diabetic ketoacidosis. Its safety in pregnancy, lactation (breastfeeding) and people under 18 is not established. Given previous experiences with the related drug troglitazone, acute diseases of the liver are regarded as a contraindication for pioglitazone.

Side effects A press release by GlaxoSmithKline in February 2007 noted that there is a greater incidence of fractures of the upper arms, hands and feet in female diabetics given rosiglitazone compared with those given metformin or glyburide. The information was based on data from the ADOPT trial. Following release of this statement, Takeda Pharmaceutical Company, the developer of pioglitazone (sold as Actos in many markets) admitted that it has similar implications for female patients. The risk of hypoglycemia is low in the absence of other drugs that lower blood glucose. Pioglitazone can cause fluid retention and peripheral edema. As a result, it may precipitate congestive heart failure (which worsens with fluid overload in those at risk). It may cause anemia. Mild weight gain is common due to increase in subcutaneous adipose tissue. In studies, patients on pioglitazone had an increased proportion of upper respiratory tract infection, sinusitis, headache, myalgia and tooth problems. Chronic administration of the drug has led to occasional instances of cholestatic hepatitis, reversible upon drug discontinuation. On 30 July 2007, an Advisory Committee of the Food and Drug Administration concluded that the use of rosiglitazone for the treatment of type 2 diabetes was associated with a greater risk of "myocardial ischemic events" when compared to placebo, but when compared to other diabetes drugs, there was no increased risk. Pioglitazone is currently being reviewed. A meta-analysis released subsequently showed that pioglitazone reduced the risk of ischemic cardiac events rather than increased the risk, but increased CHF. A 2020 Cochrane systematic review assessed occurrence of adverse effects with use of pioglitazone, but was not able to reach any conclusions due to insufficient data on included studies.

Bladder cancer On 9 June 2011, the French Agency for the Safety of Health Products decided to withdraw pioglitazone due to high risk of bladder cancer. This suspension was based on the results of an epidemiological study conducted by the French National Health Insurance. According to the results of the epidemiological study, the French agency found that patients, who were taking Actos for a long time to aid in type 2 diabetes mellitus, had a significantly increased risk of bladder cancer compared with patients who were taking other diabetes medications. On 10 June 2011, Germany's Federal Institute for Drugs and Medical Devices also advised doctors not to prescribe the medication until further investigation of the cancer risk had been conducted. On 15 June 2011, the U.S. FDA announced that pioglitazone use for more than one year may be associated with an increased risk of bladder cancer, and two months later the label was updated with an additional warning about this risk. A 2017 meta-analysis found no difference in the rates of bladder cancer attributed to pioglitazone.

Drug interactions Combination with sulfonylureas or insulin increase the risk of hypoglycemia.

Treatment with pioglitazone decreases the effectiveness of oral contraceptions containing ethinyl estradiol and norethindrone.

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with Pioglitazone

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

In research: Pioglitazone appears in science 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 Pioglitazone 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: Pioglitazone is common in secondary-school and first-year university syllabi. It links to neighbouring topics 3β-Hydroxysteroid dehydrogenase inhibitors, CYP17A1 inhibitors, CYP3A4 inducers, so understanding it makes those chapters shorter.
In everyday life: Look for Pioglitazone 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 Pioglitazone in 20 minutes

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

Frequently asked questions

What is Pioglitazone in simple terms?

Pioglitazone, sold under the brand name Actos among others, is an anti-diabetic medication used to treat type 2 diabetes. It may be used with metformin, a sulfonylurea, or insulin.

Why does Pioglitazone matter?

Because it connects several science 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 Pioglitazone?

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 Pioglitazone.