chemistry

Tiopronin

Tiopronin 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 Tiopronin rather than just read about it. In short: Tiopronin, sold under the brand name Thiola among others, is a medication used to control the rate of cystine precipitation and excretion in the disease cystinuria. It is available as a generic medication.

Key takeaways

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

Reference excerpt

Tiopronin, sold under the brand name Thiola among others, is a medication used to control the rate of cystine precipitation and excretion in the disease cystinuria. It is available as a generic medication.

Medical uses Tiopronin is indicated, in combination with high fluid intake, alkali, and diet modification, for the prevention of cystine stone formation in people 20 kilograms (44 lb) and greater with severe homozygous cystinuria, who are not responsive to these measures alone.

Side effects Tiopronin may present a variety of side effects, which are broadly similar to those of D-penicillamine and other compounds containing active sulfhydryl groups. Its pharmacokinetics have been studied.

Pharmacology

Mechanism of action Tiopronin works by reacting with urinary cysteine to form a more soluble, disulfide linked, tiopronin-cysteine complex.

Society and culture In the US, tiopronin was sold by Mission Pharmacal at $1.50 per pill, but in 2014, the rights were bought by Retrophin, owned by Martin Shkreli, and the price increased to $30 per pill for a 100 mg capsule. In 2016 Imprimis Pharmaceuticals introduced a lower cost version sold as a compounded medication.

Research It may be used for Wilson's disease (an overload of copper in the body), and has also been investigated for the treatment of arthritis, though tiopronin is not an anti-inflammatory. Tiopronin may be used as a stabilizing agent for metal nanoparticles. The thiol group binds to the nanoparticles, preventing coagulation.

References

Illustrations

Worked examples

Example 1 — a first encounter with Tiopronin

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

In research: Tiopronin 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 Tiopronin 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: Tiopronin is common in secondary-school and first-year university syllabi. It links to neighbouring topics Alpha-Amino acids, Amino acid derivatives, Orphan drugs, so understanding it makes those chapters shorter.
In everyday life: Look for Tiopronin 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 Tiopronin in 20 minutes

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

Frequently asked questions

What is Tiopronin in simple terms?

Why does Tiopronin 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 Tiopronin?

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 Tiopronin.