chemistry

Ordopidine

Ordopidine 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 Ordopidine rather than just read about it. In short: Ordopidine (INNTooltip International Nonproprietary Name; developmental code ACR-325) is an atypical dopamine D2 receptor antagonist and so-called "dopaminergic stabilizer" which is or was under development for the treatment of Parkinson's disease and bipolar disorder. It is taken orally.

Key takeaways

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

Reference excerpt

Ordopidine (INNTooltip International Nonproprietary Name; developmental code ACR-325) is an atypical dopamine D2 receptor antagonist and so-called "dopaminergic stabilizer" which is or was under development for the treatment of Parkinson's disease and bipolar disorder. It is taken orally. The drug acts as a competitive low-affinity dopamine D2 receptor antagonist with a fast dissociation rate in vitro. It inhibits dextroamphetamine-induced hyperlocomotion in rodents but has little effect on locomotor activity in untreated animals and stimulates behavioral activity in states of hypoactivity. This state-dependent profile of behavioral effects is not shared with other dopamine D2 receptor antagonists. Ordopidine shows similar neurochemical effects as conventional dopamine D2 receptor antagonists, such as increased dopamine and/or dopamine metabolite levels in various brain areas like the frontal cortex, basal ganglia, and limbic system. The actions and effects of ordopidine are similar to those of its close analogue pridopidine (which it differs from only by a single methyl group). Subsequent to their initial characterization, pridopidine was found to act as a sigma receptor ligand with much higher affinity than for the dopamine D2 receptor, with this balance of activities potentially explaining its atypicality and "dopaminergic stabilizer" properties. Ordopidine was first described in the scientific literature by 2009. The drug was developed by Carlsson Research, NeuroSearch Sweden, and Saniona. As of June 2019, no recent development has been reported. Ordopidine has reached phase 1 clinical trials.

See also List of investigational Parkinson's disease drugs OSU-6162 and 3-PPP Pridopidine and seridopidine

References

Illustrations

Worked examples

Example 1 — a first encounter with Ordopidine

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

In research: Ordopidine 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 Ordopidine 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: Ordopidine is common in secondary-school and first-year university syllabi. It links to neighbouring topics 4-Phenylpiperidines, Abandoned drugs, D2 antagonists, so understanding it makes those chapters shorter.
In everyday life: Look for Ordopidine 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 Ordopidine in 20 minutes

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

Frequently asked questions

What is Ordopidine in simple terms?

Why does Ordopidine 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 Ordopidine?

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 Ordopidine.