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Sourcing · Regulatory · continued

Research-use-only labelling: what it means and what it does not — the long version posts 31–60

This is a continuation of a long topic, addressed by post number rather than by page. Start at post 1.

PN
priorauth_notesTL2Regular22 Nov 2024#31

Post #30 describes the usual case. This is about the unusual one.

Generic or biosimilar entry depends on patent and exclusivity positions that are jurisdiction-specific and are frequently misreported.

12 likes 20mo
RZ
ro.zielinskiTL224 Nov 2024#32
v.krastev, post #15: What I can speak to on Research-use-only labelling is narrow, so I will keep it narrow rather than generalising from it. Beyond that boundary I do not know. Go to post

Marking my place. If it changes for me I will come back and say so.

4 likes in reply to #15 20mo
M
microgramsTL2Regular26 Nov 2024#33

Before the thread moves on from Research-use-only labelling — what is the sample size behind the claim? I am not being difficult; I have seen the same figure quoted from an n of four and from an n of four hundred.

0 likes 20mo
MK
m.kjaerTL227 Nov 2024 · edited#34

Nothing in this subcategory is legal advice, and the members who work in regulated environments are the most careful to say so.

Anyone who has looked at this more carefully, please correct the record.

26 likes 20mo
RH
revision_historyTL3Wiki editor29 Nov 2024#35

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.

18 likes 20mo
EM
e.mbekiTL21 Dec 2024#36
no.silva, post #21: Narrowing post #18, because the general version has more than one answer. A label change is a regulatory event with a date and a document. Citing the document is what makes a claim about labelling checkable. This is the version I would want a new member to read first. Go to post

Small correction to my own earlier position on Research-use-only labelling. I had the units the wrong way round, which changes the conclusion by an order of magnitude and therefore changes it entirely.

7 likes in reply to #21 20mo
BO
b.oylerTL13 Dec 2024#37
JI
j.ivaturiTL24 Dec 2024#38

Confirming post #35 from a second method, which matters more than confirming it from a second person.

Where I have landed on Research-use-only labelling, having got it wrong once in public: the direction is clear, the magnitude is not, and anyone quoting a precise magnitude has borrowed it from somewhere that did not measure it.

0 likes 20mo
OB
owen.bradyTL4 Moderator6 Dec 2024#39
revision_history, post #35: 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. Go to post

I disagree with the framing of Research-use-only labelling above, and I think it is a substantive disagreement rather than a terminological one. Setting out why, so it can be checked.

The reasoning depends on an assumption that is doing a lot of work and is never stated. If the assumption holds, the conclusion follows. I do not think it holds generally.

25 likes in reply to #35 20mo
MO
m.onwukaTL28 Dec 2024#40
r.laurent, post #27: Worth stating the null on Research-use-only labelling before we explain it: the observation may be nothing. That possibility deserves a sentence and usually does not get one. Go to post

Nothing in this subcategory is legal advice, and the members who work in regulated environments are the most careful to say so.

That has been true for the cases I have seen and I have not seen many.

12 likes in reply to #27 20mo
N
NLoughranTL3Regular9 Dec 2024 · edited#41
revision_history, post #35: 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. Go to post

Post #40 answers the question as asked. The question underneath it is different.

If you can confirm or contradict a position for your own region, please date the answer. An undated regional claim is the least useful thing in this category.

22 likes in reply to #35 20mo
IB
i.beaulieuTL211 Dec 2024#42

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.

Written in the hope of being told what I have missed.

0 likes 20mo
I
IMainwaringTL3Regular13 Dec 2024#43

The useful distinction on Research-use-only labelling is between what was measured and what was inferred from it. Both end up in the same sentence and only one of them has error bars.

1 like 19mo
LL
l.lundgrenTL214 Dec 2024#44
r.zielinski, post #23: If you can confirm or contradict a position for your own region, please date the answer. An undated regional claim is the least useful thing in this category. Go to post

Worth separating two things that post #42 runs together.

Speaking only to Research-use-only labelling as I have actually seen it, rather than as it is usually described: the effect is real, it is smaller than the thread suggests, and the variance between people is larger than the effect.

6 likes in reply to #23 19mo
ST
stopper_traceTL2Member16 Dec 2024#45

An indication approved for one age range does not extend to another, and paediatric extensions are separate decisions with separate evidence.

Take it as a starting point and not as a specification.

29 likes 19mo
NK
n.kaufmannTL218 Dec 2024#46

For anyone finding this later: the short answer on Research-use-only labelling is that it depends on one thing, and the rest of the thread is people identifying which thing.

0 likes 19mo
VS
vial_slopeTL3Regular19 Dec 2024#47

Taking post #44 at face value and following it one step further.

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.

3 likes 19mo
MA
m.amankwahTL221 Dec 2024#48
d.szymanski, post #30: Post #26 describes the usual case. This is about the unusual one. Since Research-use-only labelling keeps coming up, it should probably be a maintained page rather than a recurring thread. I am happy to draft it if someone with more direct experience will review it. Go to post

Post #46 and I disagree about the size of the effect, not about the direction.

Generic or biosimilar entry depends on patent and exclusivity positions that are jurisdiction-specific and are frequently misreported.

Worth saying I have only my own numbers here, and n is small.

10 likes in reply to #30 19mo
CR
crossover_reviewTL3Regular22 Dec 2024#49

The most useful thing anyone has posted about Research-use-only labelling in this category was a table of what had been measured and by whom. That is what I would want again.

0 likes 19mo
KB
k.batistaTL224 Dec 2024#50

Answering the question post #46 raises rather than the one it answers.

I would rather this thread reach "we do not know" about Research-use-only labelling than reach a confident answer that nobody can support when asked.

0 likes 19mo
MI
m.ivaturiTL226 Dec 2024#51
b.oyler, post #37: Where a claim about legality is made here, the useful follow-up is which instrument it rests on. Most such claims turn out to rest on a forum post. The mechanism is plausible, which is not the same as established. Go to post

An indication approved for one age range does not extend to another, and paediatric extensions are separate decisions with separate evidence.

14 likes in reply to #37 19mo
NV
n.vogelTL227 Dec 2024#52

I came in to disagree and I am leaving without a disagreement.

5 likes 19mo
OC
o.cousineauTL3Regular29 Dec 2024#53

Posting my Research-use-only labelling numbers with the method attached so they can be discounted properly. Uncontrolled, unblinded, and collected by someone who wanted a particular answer.

0 likes 19mo
SF
s.ferreiraTL230 Dec 2024#54
KForsberg, post #4: Nothing in this subcategory is legal advice, and the members who work in regulated environments are the most careful to say so. The claim is narrower than it sounds, and deliberately so. Go to post

The thing about Research-use-only labelling that took me longest to accept is that a plausible mechanism is not evidence of an effect. It is a reason to look, not a result.

0 likes in reply to #4 19mo
CN
c.niemelTL3Regular1 Jan 2025#55

Coming back to post #53, because the follow-up matters more than the original answer.

Where a claim about legality is made here, the useful follow-up is which instrument it rests on. Most such claims turn out to rest on a forum post.

20 likes 19mo
RM
r.mwangiTL23 Jan 2025#56

Post #53 is right about the mechanism and I think understates the practical bit.

The version of Research-use-only labelling that I was taught turned out to be a teaching simplification. Useful, and not true in the way I had assumed it was.

9 likes 19mo
B
BramleyTL2Member4 Jan 2025#57

Research-use-only labelling is a good example of a question where the honest answer is boring and the interesting answers are unsupported. I would go with boring.

2 likes 19mo
RC
r.chukwuTL26 Jan 2025 · edited#58
e.lehtinen, post #10: Research-use-only labelling looks different depending on whether you are reading the primary literature or the summaries of it, and the difference is not in our favour. Go to post

A label change is a regulatory event with a date and a document. Citing the document is what makes a claim about labelling checkable.

0 likes in reply to #10 19mo
T
TavaresTL1Member7 Jan 2025 · edited#59

This settles it for me, at least until somebody posts a reason it should not.

28 likes 19mo
PB
p.boatengTL29 Jan 2025#60

The number people quote for Research-use-only labelling is a central estimate presented without its interval, and the interval is wide enough that the estimate is nearly uninformative on its own.

13 likes 19mo