j.rasmussen

TL2 Regular · Roskilde, DK

Quiet regular. Occasional careful contradiction.

Joined 30 July 2025 · last posted 10h

84 posts, newest first. Showing up to 150.

Reading order for a first week here, and what to skip until later — what changed since Replied, post #93 · Start Here › Welcome · 27 Jul 2026 · 3 likes I think the Reading order question is answerable and has not been answered, which is a more optimistic position than most of this thread.
What a certificate commits its issuer to — one year on Replied, post #118 · Analytics › COA interpretation · 27 Jul 2026 · 10 likes What fields matter on a certificate: lot number matching the vial, test date, the analytical method stated specifically, the measured result as a number, and the…
Revisiting: Hepatic effects of glucagon receptor agonism: the mechanistic worry Replied, post #10 · Compounds › Retatrutide · 22 Jul 2026 · 15 likes Reporting rather than recommending, on Hepatic effects of glucagon receptor. What happened is above. Whether it should have is a different question and not one I am…
Seven-day rolling means and why weekly readings mislead Replied, post #63 · Outcomes › Progress reports · 19 Jul 2026 · 2 likes What I would want before treating seven-day rolling as settled: the method, the sample, and whether anyone tried to find the opposite result. Two of the three are…
Immortal time bias in a claims-database study — one year on Replied, post #25 · Evidence › Study critique · 15 Jul 2026 · 31 likes Generalisability and validity are separate axes. A trial can be internally impeccable and still tell you nothing about the person asking.
Why retatrutide discussion here is more cautious than elsewhere — one year on Replied, post #63 · Compounds › Retatrutide · 15 Jul 2026 · 0 likes Mass and identity: a report on retatrutide should state the mass detected by LC-MS, not assume a theoretical mass. The theoretical mass is not published in…
Submitting a sample: the process end to end Replied, post #71 · Sourcing › Independent verification · 10 Jul 2026 · 12 likes Post #69 describes the usual case. This is about the unusual one. What I can speak to on submitting a sample is narrow, so I will keep it narrow rather than…
Revisiting: How this community labels and discusses unrefereed work Replied, post #12 · Evidence › Preprints · 30 Jun 2026 · 4 likes Sample size and pre-registration are checkable in a preprint exactly as in a paper, and they carry the same weight. It is the kind of thing that is obvious once and…
What a certificate commits its issuer to — one year on Replied, post #92 · Analytics › COA interpretation · 20 Jun 2026 · 0 likes A chromatogram supplied as a small image is legible for peak shape and not for baseline detail. That is enough to sanity-check an integration and not enough to…
An appeal that succeeded, with the letter structure — the long version Replied, post #49 · Access › Insurance & coverage · 4 Jun 2026 · 8 likes Coming back to post #45, because the follow-up matters more than the original answer. An update on my earlier appeal post: the pattern held for another six weeks and…
[2026 update] A vial that will not fully dissolve: what to check and in what order Replied, post #88 · Practice › Reconstitution · 3 Jun 2026 · 4 likes I read post #86 twice before replying, because I had assumed the opposite. Do not shake. Swirl, or leave it. Vigorous agitation introduces air and shear, and neither…
CJC-1295 with and without DAC: what the modification does Replied, post #74 · Compounds › Secretagogues & GH axis · 3 Jun 2026 · 0 likes Picking up post #73: that is the part I would want checked first. The version of CJC-1295 that I was taught turned out to be a teaching simplification. Useful, and not…
Prescription requirements and telehealth models — a second dataset Replied, post #47 · Sourcing › Regulatory · 30 May 2026 · 0 likes Prescription requirements and telehealth models sits at the boundary between what this community can usefully discuss and what it cannot, and I think it falls on the…
Why chargeback is not the safety net people assume Replied, post #15 · Sourcing › Payments · 23 May 2026 · 0 likes Documentation and tax implications: payments you make for compounds might have implications for tax reporting depending on your jurisdiction. Keeping clear records…
Follow-up: I have no scientific background — can I still follow the analytics categories? Replied, post #12 · Start Here › Welcome · 4 May 2026 · 16 likes Reading the guidelines before you post is genuinely worth the twenty minutes. Not because you will break one, but because the rules explain why the place reads the way…
Pregnancy and pregnancy planning: contraindication and washout Replied, post #103 · Clinical › Special populations · 9 Apr 2026 · 0 likes Everything in post #101 holds. The case it does not cover is the one I have. Checked the pregnancy and pregnancy planning claim against the primary source this morning.…
When a dose reduction is the correct response to a side effect — a second dataset Replied, post #10 · Practice › Dosing & titration · 6 Apr 2026 · 14 likes The four-week escalation interval is a convention from the pivotal trials, not a pharmacological constant. The pharmacological argument is that with a week-long…
Grapefruit: why this class is not the class that cares Replied, post #116 · Practice › Interactions · 3 Apr 2026 · 29 likes Agreed on all of that, and I have nothing to add to it.
Second pass at: Adsorptive losses at low concentration, and why dilute solutions are… Replied, post #79 · Practice › Storage & stability · 1 Apr 2026 · 10 likes Answering the question post #77 raises rather than the one it answers. If someone has run Adsorptive losses properly I would rather read that than my own reconstruction…
Bioimpedance and hydration: why the number moves Replied, post #19 · Outcomes › Body composition · 18 Mar 2026 · 30 likes Thank you for the correction. I would rather find out here than later.
The lowest dose that does anything: is that a real question? Replied, post #103 · Practice › Dosing & titration · 8 Mar 2026 · 0 likes Post #99 and I disagree about the size of the effect, not about the direction. Small methodological point on lowest dose: repeating a measurement is cheap and resolves…
Measurement error in home scales, with a worked standard deviation Replied, post #10 · Research Methods › Statistics · 20 Feb 2026 · 5 likes The most common statistical error in this community is not technical: it is treating a self-selected collection of reports as a sample from a population. That is the…
Revisiting: A page that has drifted out of date and needs a maintainer Replied, post #98 · Documentation › Wiki requests · 19 Feb 2026 · 0 likes On post #96 — agreed on the reasoning, with one qualification. Suggesting content for a page: if you know a maintained page is missing something important, post a…
Why "dose equivalence" between different incretin analogues is a weak concept Replied, post #40 · Practice › Dosing & titration · 17 Feb 2026 · 19 likes Post #38 and I disagree about the size of the effect, not about the direction. Holding at a dose that is working is a legitimate position and it is not what the trial…
Foaming during reconstitution and whether it matters — the long version Replied, post #33 · Practice › Reconstitution · 13 Feb 2026 · 2 likes Reframing Foaming during reconstitution slightly, because I think the disagreement is about the question rather than the answer. If the question is "does it happen",…
Introducing myself: pharmacist, sceptic, reluctant participant Replied, post #2 · Lounge › Introductions · 28 Dec 2025 · 6 likes Marking my place. If it changes for me I will come back and say so.
Which panel is worth repeating and which is worth ignoring — a second dataset Replied, post #33 · Clinical › Bloodwork · 20 Dec 2025 · 0 likes Panel has been discussed here with more heat than it deserves, mostly because two definitions have been in play the whole time.
Second pass at: Circumference measurements as a poor man's composition estimate Replied, post #27 · Outcomes › Body composition · 15 Dec 2025 · 3 likes Resting metabolic rate: body composition affects metabolic rate. As fat mass decreases and lean mass is maintained, metabolic rate is usually maintained better than…
What "marked as solution" means and who gets to mark it — does this still hold? Replied, post #19 · Start Here › Welcome · 10 Dec 2025 · 16 likes Marked solutions are the site's way of saying that someone asked a good question and someone else gave an answer that actually worked. It is not a competition and it…
Tirzepatide in type 2 diabetes: the SURPASS programme, summarised honestly — the long… Replied, post #42 · Compounds › Tirzepatide · 6 Dec 2025 · 11 likes Research-use-only tirzepatide is not approved for human use and is not made to pharmaceutical standards. Anyone discussing it here is describing what they did, not…
What a regulator's shortage notice actually authorises — what changed since Replied, post #21 · Sourcing › Regulatory · 28 Nov 2025 · 0 likes Where a regulator publishes a decision summary, that document usually contains the reasoning and is far more informative than the announcement. I would treat that as a…
Availability by country, dated, with primary sources Replied, post #77 · Access › International · 26 Nov 2025 · 30 likes On availability the community has more anecdote than the confidence in this thread implies, and I include my own contribution in that.
Coming back to: A community side-effect dataset, with its response rate and biases Started this topic · Data & Tools › Datasets · 24 Nov 2025 · 6 likes Posting this under the heading it deserves: A community side-effect dataset, with its response rate and biases Everything below is what sits behind that. Community…
Citation sweep results: how many references did not say what was claimed Replied, post #8 · Meta › Wiki maintenance · 20 Nov 2025 · 12 likes Post #4 put the caveat in the right place and I want to underline it. Question for the editors: what is the standard for adding a citation to a claim that is community…
Revisiting: Aggregates and why a purity assay may miss them entirely Replied, post #24 · Analytics › Impurities & related substances · 18 Nov 2025 · 4 likes That matches what I have seen, for whatever a single anecdote is worth.
Semaglutide versus liraglutide head to head: reading STEP 8 carefully Replied, post #81 · Compounds › Semaglutide · 24 Oct 2025 · 0 likes Discontinuation rates in the trials are worth reading alongside efficacy and almost never are. A large mean effect in a population where a meaningful fraction stopped…
Thyroid function tests during substantial weight change Replied, post #107 · Clinical › Bloodwork · 24 Oct 2025 · 0 likes Liver enzyme changes during rapid weight loss are commonly reported and have several possible explanations, which is exactly why they need clinical interpretation…
Sleep quality changes during weight loss — what changed since Replied, post #35 · Wellbeing › Sleep · 22 Oct 2025 · 22 likes Sleep quality versus quantity: some people report changes to sleep duration; others report changes to sleep quality without duration change. Both can matter for…
What the GIP component of tirzepatide is thought to contribute, and how confident we can… Replied, post #49 · Compounds › Tirzepatide · 4 Oct 2025 · 1 like Mass and charge states: tirzepatide is about 4813.5 Da and on an electrospray instrument you would expect to see charge states mostly in the 2+ to 4+ range, the same as…
Older adults, sarcopenia risk, and the trade-off nobody quantifies Replied, post #5 · Clinical › Special populations · 28 Sep 2025 · 22 likes Older adults has been discussed here with more heat than it deserves, mostly because two definitions have been in play the whole time.
Titles that describe the question, not the situation — what changed since Replied, post #19 · Start Here › How to Ask · 16 Sep 2025 · 0 likes Quantities without units are the single commonest reason a question sits unanswered. "Two and a half" is not a dose, a volume or a concentration until you say which.…
A ten-fold dose error caught before injection Replied, post #100 · Devices › Syringes & needles · 15 Sep 2025 · 0 likes Graduation spacing is worth checking before you buy rather than after. Some 1 mL barrels are marked every two units and some every one, and that changes what doses you…
A 10 mg vial reconstituted three different ways, compared — the long version Replied, post #125 · Practice › Reconstitution · 14 Sep 2025 · 14 likes 10 mg vial reconstituted three came up in a thread eighteen months ago and was answered well. I cannot find it, which is itself the problem, so here is the…
Aggregated purity results across four services, with caveats — a second dataset Replied, post #128 · Data & Tools › Datasets · 11 Sep 2025 · 22 likes Publishing the raw records alongside the summary is what makes a dataset checkable. A summary alone asks for trust that nobody has earned.
Revisiting: Reading a denial letter as a specification for your appeal Replied, post #114 · Access › Insurance & coverage · 10 Sep 2025 · 5 likes A clinician's supporting letter that addresses the criteria explicitly is worth considerably more than one that describes the patient generally.
Hypertension improvement and when medication needs revisiting Replied, post #47 · Clinical › Comorbidities · 7 Sep 2025 · 0 likes Eating-disorder history is raised here regularly and is the case where the guidance most consistently says the decision needs specialist input.
BPC-157: what the rodent literature actually shows, and what it does not Replied, post #40 · Compounds › Repair & healing peptides · 7 Sep 2025 · 2 likes Stability of BPC-157 in solution: what has been measured in published work covers specific formulations under specific conditions. Extrapolating to a reconstituted…
Aggregated purity results across four services, with caveats — a second dataset Replied, post #35 · Data & Tools › Datasets · 7 Sep 2025 · 5 likes Where a dataset is used to support a claim in a maintained document, the version used should be cited. Otherwise the document and the data drift apart silently. I have…
Travel coolers and how long they really hold Replied, post #61 · Devices › Cold chain · 6 Aug 2025 · 3 likes Narrowing post #60, because the general version has more than one answer. Shipping container and cold packs: reputable suppliers use insulated containers with cold…
Coming back to: Semaglutide half-life: where the 165 to 184 hour figure comes from Replied, post #104 · Compounds › Semaglutide · 5 Aug 2025 · 26 likes Semaglutide half-life would be much easier to settle if anyone reported the denominator. Almost nobody reports the denominator.
Domestic fridge temperature mapping: a cheap experiment — what changed since Replied, post #151 · Devices › Cold chain · 27 Jul 2025 · 12 likes Where I part company with post #148, and it is a narrow parting. Shipping container and cold packs: reputable suppliers use insulated containers with cold packs…
Canadian access and provincial variation — one year on Replied, post #7 · Regional › North America · 19 Jul 2025 · 5 likes On Canadian access and provincial variation, the part that usually goes wrong is that the question is asked as though it has one answer. It has a range, and the width…
Coming back to: Official shortage notices and what they authorise Replied, post #38 · Access › Shortages · 24 Jun 2025 · 0 likes Switching presentation or strength during a shortage is a prescribing decision rather than a substitution anybody should improvise. Worth one more sentence than it…
Coming back to: Oxidation and deamidation mass shifts, tabulated Replied, post #14 · Analytics › Mass spectrometry · 15 Jun 2025 · 7 likes Noted, and thank you for writing it out rather than summarising it.
Request: a diff view for wiki revisions — the long version Replied, post #9 · marked as the solution · Meta › Feature requests · 14 Jun 2025 · 15 likes The caveat is the whole objection, I think. A comparison view makes two numbers look commensurable when the records behind them are different sizes. This is where my…
Publishing an inconvenient result: a case study Replied, post #32 · Sourcing › Independent verification · 10 Jun 2025 · 0 likes The record shows what was measured. Everything beyond that is inference and this site tries to keep the line visible.
A claim built entirely on a subgroup analysis Replied, post #61 · Evidence › Study critique · 28 May 2025 · 8 likes Practical answer on claim built, since the theoretical one is upthread: do the simplest check first, write down the result, and only then decide whether the complicated…
Reading a regulatory notice rather than an article about it — what changed since Replied, post #2 · Sourcing › Regulatory · 13 May 2025 · 7 likes Nothing in this subcategory is legal advice, and the members who work in regulated environments are the most careful to say so. Take the reasoning and check the…
An emergency department visit, described afterwards Replied, post #20 · Safety › Adverse events · 13 May 2025 · 0 likes I had written a reply contradicting post #16 and deleted it. Here is what survived. The strongest argument against my own position on emergency department visit, stated…
UK access routes, dated and sourced — a second dataset Replied, post #74 · Regional › UK & Ireland · 7 May 2025 · 14 likes Post #71 is right about the mechanism and I think understates the practical bit. Cross-border movement between the two jurisdictions is not the same as domestic…
DXA precision and the least significant change for lean mass — the long version Replied, post #5 · Outcomes › Body composition · 4 May 2025 · 29 likes Absolute lean mass and lean mass as a proportion move differently and answer different questions. Report both or say which. That matches what I was told, which is not…
Adjudicated events and why the definition matters — the long version Replied, post #110 · Evidence › Trials · 21 Apr 2025 · 0 likes Adjudicated events is worth one more sentence than it usually gets, and the sentence is the one about how the number was arrived at.
Metformin co-administration and additive GI effects Started this topic · Practice › Interactions · 16 Apr 2025 · 6 likes Metformin co-administration and additive GI effects Writing it up because I had to work it out twice and would rather nobody else did. Trying to work out what would…
A report I filed that turned out to be wrong, and the correction Replied, post #11 · Sourcing › Vendor reports · 11 Apr 2025 · 11 likes The arithmetic in post #10 is right; the assumption feeding it is the part to check. The cost of a submission is worth stating. It is the main reason people do not do…
What happens after your first post: likes, trust levels, and why none of it matters much Replied, post #18 · Start Here › Welcome · 31 Mar 2025 · 0 likes Adding a note of thanks rather than an opinion. I did not know most of that.
Validating a method you did not develop — does this still hold? Replied, post #68 · Analytics › Method validation · 3 Mar 2025 · 0 likes Transfer between laboratories: a method can be transferred from one lab to another, but the receiving lab needs to demonstrate that they can achieve the same…
Amylin analogue mechanism: satiety signalling separate from GLP-1 Replied, post #69 · Compounds › Cagrilintide & amylin analogues · 21 Feb 2025 · 21 likes Where I part company with post #67, and it is a narrow parting. Is synergy the right word for the combination data? A phase 2 trial cannot establish whether effects are…
Random versus fixed effects: choosing rather than defaulting — a second dataset Replied, post #71 · Evidence › Meta-analyses · 7 Feb 2025 · 0 likes On post #69 — agreed on the reasoning, with one qualification. Study quality and weighting: some meta-analyses weight all studies equally; others weight by study size…
Scheduled maintenance and what will be unavailable Replied, post #32 · Meta › Announcements · 3 Feb 2025 · 0 likes A note on how scheduled maintenance gets discussed rather than on scheduled maintenance itself: the confident posts get the replies and the careful ones get ignored,…
Gallbladder disease risk with rapid weight loss Replied, post #59 · Clinical › Comorbidities · 18 Jan 2025 · 25 likes Cardiovascular disease: several compounds have cardiovascular outcome trials. SELECT was in people without diabetes; SUSTAIN 6 was in high-risk diabetes. Absolute…
[2026 update] New subcategory: rationale and scope Replied, post #149 · Meta › Announcements · 14 Jan 2025 · 9 likes Post #146 is the version of this I will quote in future. One addition. Worth saying publicly: stepping back cleanly and handing over is a service. Documents with an…
Persistent vomiting and the threshold for seeking help — one year on Replied, post #40 · Safety › Adverse events · 22 Dec 2024 · 17 likes I would keep Persistent vomiting and the decision it usually gets used for separate in this thread. They are related and they are not the same question, and merging…
Molecular mass of semaglutide and why the figure differs between sources — does this… Replied, post #34 · Compounds › Semaglutide · 20 Dec 2024 · 2 likes Adding a data point of agreement rather than a data point.
Checking someone else's arithmetic: a worked example thread Replied, post #8 · Practice › Reconstitution · 18 Dec 2024 · 7 likes Post #5 is right about the mechanism and I think understates the practical bit. Do not shake. Swirl, or leave it. Vigorous agitation introduces air and shear, and…
Body image changing more slowly than the body Replied, post #38 · Wellbeing › Mental health · 15 Dec 2024 · 0 likes Where a member is finding this hard, the useful reply is usually a question rather than an answer, and this subcategory does that well.
Why "any advice?" is the least effective ending for a post Replied, post #78 · Start Here › How to Ask · 27 Nov 2024 · 22 likes Avoid "any advice?" at the end. It is so generic that people do not know which part of the post it refers to. Pick the specific part and ask that specific question…
Levothyroxine timing: a real interaction with a simple fix Replied, post #10 · Practice › Interactions · 24 Nov 2024 · 0 likes The arithmetic in post #9 is right; the assumption feeding it is the part to check. Gastrointestinal symptoms from one compound can mask or mimic an interaction with…
Why we hide unevidenced fraud accusations and log the hiding Replied, post #17 · Sourcing › Red flags · 19 Nov 2024 · 17 likes Post #13 and I disagree about the size of the effect, not about the direction. The strongest single signal available cheaply is what happens when you ask a technical…
Criticising the method without criticising the authors Replied, post #18 · Evidence › Study critique · 19 Nov 2024 · 33 likes The pre-specified endpoint being a weaker proxy than you would like is a real criticism. It is a smaller one than saying the result was chosen after the fact.
How to ask for a dose change without antagonising anyone — what changed since Replied, post #16 · Clinical › Prescriber conversations · 29 Oct 2024 · 2 likes Post #13 is right about the mechanism and I think understates the practical bit. Prescription logistics: confirm whether it will be filled locally, requires mail order,…
Follow-up: Oral contraceptives and delayed emptying: what the data shows Replied, post #19 · Practice › Interactions · 11 Oct 2024 · 0 likes The arithmetic in post #16 is right; the assumption feeding it is the part to check. The practical advice most consistently given by pharmacists here is to keep the…
Splitting a vial for two laboratories: how to do it without ruining both — what changed… Replied, post #115 · Sourcing › Independent verification · 7 Oct 2024 · 0 likes Narrowing post #113, because the general version has more than one answer. Verification records are dated because they expire in usefulness. A result from two years ago…
Promotion criteria, and the one that stops most nominations Replied, post #78 · Documentation › Doc review · 5 Oct 2024 · 0 likes Objections are genuinely wanted at this stage, because a bad promotion is much harder to undo than a bad reply.
The C-cell question: rodent findings and their human context — what changed since Replied, post #39 · Compounds › Semaglutide · 6 Sep 2024 · 18 likes On c-cell question the community has more anecdote than the confidence in this thread implies, and I include my own contribution in that.