chemistry

LA-Pip

LA-Pip 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 LA-Pip rather than just read about it. In short: Lysergic acid piperidide (LA-Pip or LSD-Pip), also known as N-piperidinyllysergamide, is a serotonin receptor modulator of the lysergamide family related to lysergic acid diethylamide (LSD). It is the analogue of LSD in which the N,N-diethyl substitution has been replaced with an N-piperidide ring.

Key takeaways

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

Reference excerpt

Lysergic acid piperidide (LA-Pip or LSD-Pip), also known as N-piperidinyllysergamide, is a serotonin receptor modulator of the lysergamide family related to lysergic acid diethylamide (LSD). It is the analogue of LSD in which the N,N-diethyl substitution has been replaced with an N-piperidide ring. The drug has fairly similar affinity and efficacy as a serotonin 5-HT2A receptor agonist compared to LSD, though is variably less potent in terms of EC50Tooltip half-maximal effective concentration depending on the assay. It also has high affinity for the serotonin 5-HT1A and 5-HT2C receptors. LA-Pip has about 8.5% of the antiserotonergic activity of LSD (relative to 2.0% for LSM-775 and 4.7% for LPD-824) in the isolated rat uterus in vitro. LA-Pip has been said to be non-hallucinogenic or much less psychedelic than LSD in humans. However, this does not appear to have actually been stated anywhere in the originally cited source. Other sources indicate that LA-Pip has not been assessed in humans. Correspondingly, the dose range and potency of LA-Pip as a psychedelic relative to LSD have not been reported. LA-Pip was first described in the scientific literature by Albert Hofmann and colleagues by 1955. There were additional publications on the compound in the later 1950s. It has not been encountered as a designer drug as of 2020. The drug is not a controlled substance in Canada as of 2025.

See also Substituted lysergamide Lysergic acid pyrrolidide (LPD-824) Lysergic acid morpholide (LSM-775) Lysergic acid azepane (LA-Azepane) Lysergic acid 2,4-dimethylazetidide (LA-SS-Az, LSZ) Lysergic acid 2-butyl amide (LSB) 25B-NAcPip

References

External links LA-Pip - Isomer Design

Illustrations

Worked examples

Example 1 — a first encounter with LA-Pip

Start with the simplest possible case. Write down what LA-Pip 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 LA-Pip 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 LA-Pip 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 LA-Pip

In research: LA-Pip 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 LA-Pip 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: LA-Pip is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1-Piperidinyl compounds, 5-HT2A agonists, Carboxamides, so understanding it makes those chapters shorter.
In everyday life: Look for LA-Pip 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 LA-Pip in 20 minutes

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

Frequently asked questions

What is LA-Pip in simple terms?

Why does LA-Pip 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 LA-Pip?

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 LA-Pip.