Why a compound being unapproved is not the same as being illegal to possess

Compounding and pharmacy rules: some jurisdictions allow a pharmacy to compound a drug that is not on the market under specific conditions. The conditions are strict and vary by jurisdiction. Generalising from one country's rules to another's is unreliable.

Worth separating two things that post #12 runs together.

Import restrictions vary by compound and by jurisdiction: what is a controlled substance in one place is legal to purchase in another. What you can import for personal use depends on your country's rules, not on where it is sold.

Why this category is maintained as documentation, not as recommendations: the goal is factual accuracy and sourcing, not endorsement of any specific regulatory position.

Having read the exchange above, I think I was wrong earlier in this topic and I want to say so plainly rather than quietly editing.

The correction was fair and I had been repeating something I had not checked carefully enough.

post #18 answers the question as asked. The question underneath it is different.

Thank you for the correction. I have edited my earlier post with a note rather than silently, so the thread still makes sense to read. The error was mine and it was the kind that comes from remembering a figure instead of looking it up.

On post #16 — agreed on the reasoning, with one qualification.

Preclinical versus clinical: compounds with strong preclinical data can fail in clinical trials. Compounds with no human data are being used on theoretical grounds. The regulatory position reflects this asymmetry.

Research-use-only status is a legal classification, not a safety classification. It means the compound is sold for laboratory use and not for human consumption. The label does not establish whether the molecule is safe, efficacious, or toxic.

post #21 is right about the mechanism and I think understates the practical bit.

Primary documents matter: regulatory positions are published in official documents. Reading the regulatory agency's website directly is more reliable than reading a forum summary of it.

I read post #21 twice before replying, because I had assumed the opposite.

Labelling and intended use: a compound sold as "research-use-only" does not change its pharmacology if ingested. It changes the legal status of the sale. The labelling tells you the intended use, not the actual use people make of it.

Off-label use and medical practice: clinicians can prescribe approved medications off-label under some circumstances. That is different from research-use-only compounds, which are not approved for any human use.

Approval versus licensing: a compound can be approved for a specific indication in one country and not approved at all in another. Tracking jurisdictional approval is tedious but necessary.

Coming back to post #25, because the follow-up matters more than the original answer.

Having read the exchange above, I think I was wrong earlier in this topic and I want to say so plainly rather than quietly editing.

The correction was fair and I had been repeating something I had not checked carefully enough.

Picking up post #25: that is the part I would want checked first.

Primary documents matter: regulatory positions are published in official documents. Reading the regulatory agency's website directly is more reliable than reading a forum summary of it.

Worth separating two things that post #25 runs together.

Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did and when. The single most useful thing in your own records is not any individual result; it is that they are dated and consecutive.

Approval versus licensing: a compound can be approved for a specific indication in one country and not approved at all in another. Tracking jurisdictional approval is tedious but necessary.