science

LPH-5 (drug)

LPH-5 (drug) 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 LPH-5 (drug) rather than just read about it. In short: LPH-5, also known as (S)-3-(2,5-dimethoxy-4-(trifluoromethyl)phenyl)piperidine or as (S)-2C-TFM-3PIP, is a psychedelic drug of the phenethylamine, 2C, and 3-phenylpiperidine families which is under development for potential medical use. It is a cyclized phenethylamine and is the derivative of 2C-TFM in which the β position has been connected to the amine to form a piperidine ring.

Key takeaways

LPH-5 (drug) belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect LPH-5 (drug) to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of LPH-5 (drug) from memory before moving on to harder problems.

Reference excerpt

LPH-5, also known as (S)-3-(2,5-dimethoxy-4-(trifluoromethyl)phenyl)piperidine or as (S)-2C-TFM-3PIP, is a psychedelic drug of the phenethylamine, 2C, and 3-phenylpiperidine families which is under development for potential medical use. It is a cyclized phenethylamine and is the derivative of 2C-TFM in which the β position has been connected to the amine to form a piperidine ring.

Interactions

Pharmacology

Pharmacodynamics LPH-5 acts as a potent partial agonist of the serotonin 5-HT2A receptor (Ki = 1.3 nM, EC50Tooltip half-maximal effective concentration = 2.1–25 nM, EmaxTooltip maximal efficacy = 56–94%). It shows 10- to 100-fold selectivity for the 5-HT2A receptor over the serotonin 5-HT2B and 5-HT2C receptors in terms of affinity and activational potency. Along with related compounds like 25CN-NBOH, DMBMPP, and TGF-8027, LPH-5 is said to be one of the few truly selective serotonin 5-HT2A receptor agonists. The drug robustly induces the head-twitch response as well as persistent and robust antidepressant-like effects in rodents. Owing to its high selectivity for the serotonin 5-HT2A receptor, LPH-5 is expected to avoid the cardiac and other risks of serotonin 5-HT2B receptor activation.

Chemistry

Analogues LPH-5's analogue LPH-48 is likewise a selective serotonin 5-HT2A receptor agonist and psychedelic with similar characteristics. However, this drug has a shorter duration of action than LPH-5. As with LPH-5, LPH-48 is also under development by Lophora for potential medical use. Another analogue of LPH-5 is 2T-2CTFM-3PIP (2-thio-LPH-5).

History LPH-5 was patented in 2021 and was first described in the scientific literature by Emil Märcher-Rørsted and colleagues in 2024. These researchers are affiliated with the Danish pharmaceutical company Lophora. In late 2025, LPH-5 was suggested as a possible alternative and replacement of DOI for use in scientific research.

Society and culture

Legal status

Canada LPH-5 is not an explicitly controlled substance in Canada as of 2025. However, as a derivative of 2Cs, it might fall under phenethylamine blanket-ban language, although as a cyclized phenethylamine this is unclear.

United States LPH-5 is not an explicitly controlled substance in the United States. However, it could be considered a controlled substance under the Federal Analogue Act if intended for human consumption.

Research LPH-5 is under development by Lophora and Atai Beckley (formerly Atai Life Sciences and Beckley Psytech) for the potential treatment of major depressive disorder. As of May 2025, it is in phase I clinical trials for this indication.

Illustrations

Worked examples

Example 1 — a first encounter with LPH-5 (drug)

Start with the simplest possible case. Write down what LPH-5 (drug) 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 LPH-5 (drug) 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 LPH-5 (drug) 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 LPH-5 (drug)

In research: LPH-5 (drug) 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 LPH-5 (drug) 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: LPH-5 (drug) is common in secondary-school and first-year university syllabi. It links to neighbouring topics (Trifluoromethyl)benzene derivatives, 2C (psychedelics), 3-Phenylpiperidines, so understanding it makes those chapters shorter.
In everyday life: Look for LPH-5 (drug) 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 LPH-5 (drug) in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what LPH-5 (drug) 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 LPH-5 (drug) out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is LPH-5 (drug) in simple terms?

Why does LPH-5 (drug) 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 LPH-5 (drug)?

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 LPH-5 (drug).