chemistry

Proscaline

Proscaline 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 Proscaline rather than just read about it. In short: Proscaline, also known as 4-propoxy-3,5-dimethoxyphenethylamine, is a psychedelic drug of the phenethylamine and scaline families related to mescaline. It is taken orally.

Key takeaways

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

Reference excerpt

Proscaline, also known as 4-propoxy-3,5-dimethoxyphenethylamine, is a psychedelic drug of the phenethylamine and scaline families related to mescaline. It is taken orally.

Use and effects In his book PiHKAL (Phenethylamines I Have Known and Loved) and other publications, Alexander Shulgin reports that a dose of 30 to 60 mg orally produces effects lasting 8 to 12 hours. The onset was not described, but peak effects occurred after about 2 hours. A typical dose estimate is 45 mg. Doses as high as 80 mg have also been explored. The drug is about six times the potency of mescaline, which itself has a listed dose range of 200 to 400 mg. The effects of proscaline have been reported to include insignificant closed-eye visuals, sharpening of the senses, hyperawareness, relaxation and feeling at ease, deep feelings of peace and contentment, euphoria, no enhanced clarity or deep realizations, feelings of uninhibited eroticism, pain relief, drowsiness, intoxication and feeling drunk, irritability, restlessness, tremors, insomnia, difficulty with dreams, long-lasting residual effects, and no next-day hangover.

Interactions

Pharmacology

Pharmacodynamics Proscaline is a serotonin 5-HT2 receptor agonist, including of the serotonin 5-HT2A, 5-HT2B, and 5-HT2C receptors. Activation of the serotonin 5-HT2A receptor is thought to be responsible for its psychedelic effects. The drug is much more potent as an agonist of the serotonin 5-HT2C receptor than as an agonist of the serotonin 5-HT2A or 5-HT2B receptors. It produces the head-twitch response, a behavioral proxy of psychedelic effects, in rodents.

Chemistry Proscaline, also known as 4-propoxy-3,5-dimethoxyphenethylamine, is a substituted phenethylamine and scaline (4-substituted 3,5-dimethoxyphenethylamine) derivative related to mescaline (3,4,5-trimethoxyphenethylamine). It is the 4-propoxy homologue of mescaline.

Properties Proscaline is much more lipophilic than mescaline or escaline (log P = 1.70, 0.78, and 1.11, respectively), which is expected to be more optimal and advantageous in terms of drug-like properties such as blood–brain barrier permeability.

Synthesis The chemical synthesis of proscaline has been described.

Analogues Analogues of proscaline include mescaline, escaline, isoproscaline, allylescaline, methallylescaline, propynyl, cyclopropylmescaline, cycloproscaline, fluoroproscaline, and 3C-P, among others.

History Proscaline was first synthesized and studied by Otakar Leminger in 1972. The drug was later synthesized by Alexander Shulgin and further described in his 1991 book PiHKAL (Phenethylamines I Have Known and Loved). It was encountered as a novel designer drug in Europe in 2013.

Society and culture

Legal status

Canada Proscaline is not a controlled substance in Canada as of 2025.

United Kingdom Proscaline is a Class A controlled substance in the United Kingdom.

United States Proscaline 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.

Illustrations

Worked examples

Example 1 — a first encounter with Proscaline

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

In research: Proscaline 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 Proscaline 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: Proscaline is common in secondary-school and first-year university syllabi. It links to neighbouring topics 5-HT2A agonists, 5-HT2B agonists, 5-HT2C agonists, so understanding it makes those chapters shorter.
In everyday life: Look for Proscaline 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 Proscaline in 20 minutes

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

Frequently asked questions

What is Proscaline in simple terms?

Proscaline, also known as 4-propoxy-3,5-dimethoxyphenethylamine, is a psychedelic drug of the phenethylamine and scaline families related to mescaline. It is taken orally.

Why does Proscaline 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 Proscaline?

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 Proscaline.