chemistry

Metaxalone

Metaxalone 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 Metaxalone rather than just read about it. In short: Metaxalone, sold under the brand name Skelaxin, is a muscle relaxant medication used to relax muscles and relieve pain caused by strains, sprains, and other musculoskeletal conditions. It is a moderately strong muscle relaxant, with relatively low incidence of side effects.

Key takeaways

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

Reference excerpt

Metaxalone, sold under the brand name Skelaxin, is a muscle relaxant medication used to relax muscles and relieve pain caused by strains, sprains, and other musculoskeletal conditions. It is a moderately strong muscle relaxant, with relatively low incidence of side effects. Its exact mechanism of action is not known, but it may be due to general central nervous system depression. Studies in vitro have shown metaxalone to suppress production of pro-inflammatory cytokines such as TNF-α and IL-6 and increase production of the antiinflammatory cytokine IL-13, however it also inhibits MAO-A and this may both contribute to its therapeutic effects and also is linked to toxicity in overdose. Common side effects include nausea, vomiting, drowsiness, and central nervous system (CNS) side effects, such as dizziness, headache, and irritability. The metabolism of metaxalone involves enzymes CYP1A2 and CYP2C19 in the cytochrome P450 system. Because many medications are metabolized by enzymes in this system, precaution must be taken when administering it with other medications involving the P450 system to avoid interactions. Because of the potential for side effects, this drug is considered high risk in the elderly.

Pharmacokinetics Metaxalone exhibits increased bioavailability when taken with food. Specifically, in one study, compared to fasted conditions, the presence of food at the time of drug administration increased Cmax by 77.5%, AUC0-t by 23.5%, and AUC0-∞ by 15.4%. Metaxalone is a substrate of CYP1A2 and CYP2C19, an inhibitor of CYP1A2, CYP2B6, CYP2C9, CYP2C19, CYP2D6, CYP2E1, and CYP3A, and an inducer of CYP1A2 and CYP3A4.

Assay Nirogi et al. reported a liquid chromatographic method coupled to tandem mass spectrometry for the quantification of metaxalone in human plasma. A stability-indicating HPLC method was introduced by P. K. Sahu et al. Metaxalone has been used as an internal standard for few analytical methods.

References

External links "Metaxalone". Drug Information Portal. U.S. National Library of Medicine. 2022-08-16. Archived from the original on June 28, 2019.

Illustrations

Worked examples

Example 1 — a first encounter with Metaxalone

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

In research: Metaxalone 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 Metaxalone 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: Metaxalone is common in secondary-school and first-year university syllabi. It links to neighbouring topics Carbamates, Drugs developed by Pfizer, Drugs not assigned an ATC code, so understanding it makes those chapters shorter.
In everyday life: Look for Metaxalone 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 Metaxalone in 20 minutes

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

Frequently asked questions

What is Metaxalone in simple terms?

Why does Metaxalone 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 Metaxalone?

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 Metaxalone.