science

Panamesine

Panamesine 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 Panamesine rather than just read about it. In short: Panamesine (INNTooltip International Nonproprietary Name; developmental code name EMD-57455) is a sigma receptor antagonist that was under development by Merck as a potential antipsychotic for the treatment of schizophrenia in the 1990s but was never marketed. It is a selective antagonist of both sigma receptor subtypes, the σ1 and σ2 receptors (IC50 = 6 nM).

Key takeaways

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

Reference excerpt

Panamesine (INNTooltip International Nonproprietary Name; developmental code name EMD-57455) is a sigma receptor antagonist that was under development by Merck as a potential antipsychotic for the treatment of schizophrenia in the 1990s but was never marketed. It is a selective antagonist of both sigma receptor subtypes, the σ1 and σ2 receptors (IC50 = 6 nM). In addition, the major metabolite of the drug, EMD-59983, has high affinity for the sigma receptors (IC50 = 24 nM) and the dopamine D2 (IC50 = 23 nM) and D3 receptors, with potent antidopaminergic activity. Panamesine reached phase II clinical trials for schizophrenia prior to the discontinuation of its development. CNS review:

See also List of investigational antipsychotics BMY-14802 Eliprodil Rimcazole

References

Worked examples

Example 1 — a first encounter with Panamesine

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

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

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

Frequently asked questions

What is Panamesine in simple terms?

Why does Panamesine 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 Panamesine?

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 Panamesine.