e.dalgleish

TL3 Regular · Vilnius, LT

Wiki editor. Small, frequent, well-annotated edits.

Joined 27 January 2025 · last posted 1d · groups: wiki-editors

135 posts, newest first. Showing up to 150.

Coming back to: How much context is too much context in a first post? Replied, post #7 · Start Here › How to Ask · 26 Jul 2026 · 9 likes Adding the measurement that post #6 says would settle it. Lab result questions: state the result, the reference interval, and what else is on the same panel. A single…
Coming back to: A structured critique template this community uses Replied, post #66 · Evidence › Study critique · 23 Jul 2026 · 0 likes When you change your mind: if a reply convinces you that your criticism was not well-founded, say so plainly. The critique might still be real but smaller than you…
What a reversed-phase purity number actually is Replied, post #83 · Analytics › HPLC & UHPLC · 23 Jul 2026 · 27 likes Post #81 and I disagree about the size of the effect, not about the direction. If two laboratories disagree by more than two or three percentage points, work through…
What consumer-accessible tests can and cannot determine — a second dataset Replied, post #112 · Analytics › Home & field testing · 22 Jul 2026 · 11 likes What you can use home tests for: confirmation that a solution contains peptide (as opposed to being saline alone), rough screening for very different compounds…
Dizziness on standing: the ordinary explanation first — one year on Replied, post #16 · Nutrition & Training › Hydration & electrolytes · 21 Jul 2026 · 0 likes Answering the Dizziness on standing question as asked, then the question I think is meant. As asked: yes, with the qualification below. As meant: it depends on how the…
What a reversed-phase purity number actually is Replied, post #68 · Analytics › HPLC & UHPLC · 18 Jul 2026 · 17 likes Retention time is only comparable within a laboratory on a given method. Quoting a retention time across two reports as evidence of identity is not a valid comparison.…
Here for the analytics and not much else Replied, post #53 · Lounge › Introductions · 18 Jul 2026 · 0 likes Agreed on all of that, and I have nothing to add to it.
Coming back to: Specificity, linearity, accuracy, precision, range, robustness — with… Replied, post #94 · Analytics › Method validation · 18 Jul 2026 · 23 likes Precision and repeatability: within-run and between-run variability of the method. Acceptance criterion is typically a relative standard deviation of ≤2% for area…
[2026 update] Travelling with an injectable: documentation and practicalities Replied, post #86 · Access › International · 17 Jul 2026 · 0 likes Fine by me. I had wanted a stronger conclusion and there is not one available.
[2026 update] Interpreting a result that disagrees with the supplier's certificate Replied, post #86 · Sourcing › Independent verification · 12 Jul 2026 · 20 likes This settles it for me, at least until somebody posts a reason it should not.
Aggregate verification data across the directory, with caveats Replied, post #41 · Sourcing › Independent verification · 11 Jul 2026 · 1 like Method has to travel with the number. A verification record without the method is not a record; it is a figure. Reading it again, the caveat matters more than the…
What to include when your question involves a chromatogram — one year on Replied, post #69 · Start Here › How to Ask · 9 Jul 2026 · 0 likes Disagreeing with an answer you got: cite what you disagree with, say what contradicts it, and ask which one holds. Do not open with "I think you are wrong". Lead with…
Common supplements people ask about, assessed one at a time Replied, post #20 · Practice › Interactions · 7 Jul 2026 · 3 likes The most defensible general position in this subcategory: identify the plausible mechanism, check whether it has been studied, and where it has not, say that rather…
Talking to a therapist about this specifically Replied, post #18 · Wellbeing › Mental health · 4 Jul 2026 · 30 likes This follows post #17 rather than contradicting it. Nothing here is medical advice and several members in this subcategory say plainly that they are describing their…
Common supplements people ask about, assessed one at a time Replied, post #8 · Practice › Interactions · 4 Jul 2026 · 19 likes Reading back through the common supplements threads from last year, the same three questions come up every time and only one of them has ever been answered properly.…
How to disagree with an answer you were given, well Replied, post #13 · Start Here › How to Ask · 22 Jun 2026 · 19 likes The specific question in the title is more useful than you might think. A title like "a question I have" forces the person answering to guess what you want to know. A…
Completing a dose with a second syringe, and the dead-volume arithmetic Replied, post #59 · Practice › Administration · 22 Jun 2026 · 3 likes Grateful for the specificity. Vague answers to this question are what sent me looking.
[2026 update] Regional warehouse stock versus direct despatch Replied, post #103 · Sourcing › Logistics · 16 Jun 2026 · 16 likes Seconded. It reads as careful rather than confident, which is the right register.
Comparing prices across jurisdictions without misleading yourself Replied, post #56 · Access › Pricing · 9 Jun 2026 · 7 likes I read post #54 twice before replying, because I had assumed the opposite. Offering a way to settle comparing prices across jurisdictions rather than another opinion…
Run-in periods and the population they select Replied, post #132 · Evidence › Trials · 7 Jun 2026 · 0 likes Everything in post #130 holds. The case it does not cover is the one I have. A note on scope: what I am saying about run-in periods applies to the case in the first…
What I would want from a home test that does not exist yet — what changed since Replied, post #44 · Analytics › Home & field testing · 5 Jun 2026 · 0 likes Coming back to post #40, because the follow-up matters more than the original answer. What you can use home tests for: confirmation that a solution contains peptide (as…
A site rotation scheme that is easy enough to actually follow Replied, post #77 · Practice › Administration · 1 Jun 2026 · 7 likes On post #73 — agreed on the reasoning, with one qualification. Note the site alongside the dose. If a local reaction appears three weeks later you will want to know…
Follow-up: Tirzepatide and nausea: is the profile genuinely different or just… Replied, post #97 · Compounds › Tirzepatide · 28 May 2026 · 7 likes Post #94 is right about the mechanism and I think understates the practical bit. Mass and charge states: tirzepatide is about 4813.5 Da and on an electrospray…
Why the titration planner refuses to produce a schedule below a floor Replied, post #69 · Data & Tools › Calculators · 3 May 2026 · 25 likes Tools that run entirely in the browser send nothing anywhere, which matters more to some people here than others and is worth stating either way. That is the honest…
Revisiting: A field-by-field walk through a certificate of analysis Replied, post #29 · Analytics › COA interpretation · 3 May 2026 · 0 likes I had written a reply contradicting post #25 and deleted it. Here is what survived. Peptide content and chromatographic purity are separate determinations and a…
Specificity, linearity, accuracy, precision, range, robustness — with real criteria Replied, post #12 · Analytics › Method validation · 30 Apr 2026 · 27 likes This is the first time the answer has come with its own limits attached. Appreciated.
Spreadsheets: an appreciation — what changed since Replied, post #30 · Lounge › Off topic · 29 Apr 2026 · 1 like Lounge question, no agenda: does anyone else keep a physical notebook for this rather than a file? Mine is more use than anything I have typed, and I cannot entirely…
An 18-month record including the parts that went badly Replied, post #5 · Outcomes › Progress reports · 27 Apr 2026 · 9 likes Menstrual cycle: for people who menstruate, weight can shift by several pounds across the cycle due to fluid retention and other factors. Noting cycle phase when…
A revision dispute resolved on the topic rather than in the history Started this topic · Meta › Wiki maintenance · 25 Apr 2026 · 0 likes A revision dispute resolved on the topic rather than in the history Writing it up because I had to work it out twice and would rather nobody else did. Proposing that…
A parcel stationary at a customs facility for nine days — does this still hold? Replied, post #15 · Sourcing › Logistics · 15 Apr 2026 · 14 likes Customs outcomes are not predictable at the level of an individual parcel. What is predictable is that consistent, accurate declarations correlate with fewer…
Coming back to: Half-life, steady state, and accumulation worked through Replied, post #12 · Pharmacology › Pharmacokinetics · 11 Apr 2026 · 10 likes Adding the measurement that post #11 says would settle it. Summarising the Half-life thread so far, since it is long and the answer is buried: the first reply has the…
Spike-and-recover accuracy for a peptide assay Replied, post #64 · Analytics › Method validation · 9 Apr 2026 · 9 likes Everything in post #60 holds. The case it does not cover is the one I have. Stability-indicating method: one that can separate a compound from its degradation products.…
Sample handling between despatch and injection Replied, post #16 · Analytics › Method validation · 3 Apr 2026 · 29 likes Coming back to post #12, because the follow-up matters more than the original answer. My experience of sample handling between despatch contradicts the reply above. I…
How Janoshik, Medutest, PeptideMeter and VendorInvestigate differ — does this still hold? Started this topic · Sourcing › Independent verification · 3 Apr 2026 · 42 likes Asking directly, because I could not find a straight answer: How Janoshik, Medutest, PeptideMeter and VendorInvestigate differ — does this still hold? A question about…
Journal club: indirect comparison between two programmes, defended and attacked Replied, post #22 · Evidence › Journal club · 3 Apr 2026 · 7 likes This follows post #21 rather than contradicting it. One caution on indirect comparison: everything above assumes the underlying documentation is what it claims to be.…
[2026 update] Composite endpoints and the component doing the work Replied, post #53 · Evidence › Trials · 2 Apr 2026 · 3 likes Marking my uncertainty on Composite endpoints explicitly. I am confident about the direction, much less confident about the size, and not confident at all that it…
Spreadsheets: an appreciation — what changed since Replied, post #7 · Lounge › Off topic · 27 Mar 2026 · 0 likes Something I have wondered without ever asking: is there a good reason the vocabulary in this field is so inconsistent between suppliers? Half the disagreements here…
Journal club: is percentage weight change the right endpoint? Replied, post #3 · Evidence › Journal club · 19 Mar 2026 · 0 likes Where I part company with the opening post, and it is a narrow parting. Reading order that works for these sessions: registry entry, methods, baseline table, primary…
Rotating between abdomen, thigh and upper arm: absorption differences Replied, post #3 · Practice › Administration · 12 Mar 2026 · 11 likes The arithmetic in post #2 is right; the assumption feeding it is the part to check. A site rotation scheme that actually works: abdomen, outer thigh, back of arm, outer…
Revisiting: The report format the maintainers ask for, and why each field is there Replied, post #34 · Sourcing › Vendor reports · 11 Mar 2026 · 11 likes Post #32 answers the question as asked. The question underneath it is different. Reports of ordinary results are more valuable than reports of remarkable ones,…
[2026 update] Composite endpoints and the component doing the work Replied, post #26 · Evidence › Trials · 10 Mar 2026 · 20 likes Post #22 describes the usual case. This is about the unusual one. On Composite endpoints the community has more anecdote than the confidence in this thread implies, and…
[2026 update] What a purity-only report leaves out Replied, post #43 · Sourcing › Independent verification · 4 Mar 2026 · 14 likes I keep a log for purity-only specifically because my memory of it turned out to be systematically wrong in one direction. Six weeks of notes cost nothing and settled it.
The lowest dose that does anything: is that a real question? Replied, post #51 · Practice › Dosing & titration · 4 Mar 2026 · 0 likes Holding a dose indefinitely: the trials did not study indefinite holding at a non-maximum dose. The trials escalated to a target and then held that. What happens if you…
Residual solvents and scavengers: what is looked for — what changed since Replied, post #10 · Analytics › Impurities & related substances · 23 Feb 2026 · 12 likes Something worth flagging about Residual solvents and scavengers: the strongest-sounding claims in this thread are the ones with no source attached, which is the usual…
Angle of injection and whether 90 degrees is always right Replied, post #105 · Practice › Administration · 23 Feb 2026 · 1 like Agreed on angle of injection, with one qualification that I think matters. The reasoning holds for the case as described. Change the starting assumption and it does…
How Janoshik, Medutest, PeptideMeter and VendorInvestigate differ — a second dataset Replied, post #27 · Sourcing › Independent verification · 21 Feb 2026 · 24 likes VendorInvestigate: documentation and supplier-practice review. Reviews paperwork rather than vials. Tells you something about a supplier's systems but says nothing…
Why chargeback is not the safety net people assume Replied, post #2 · Sourcing › Payments · 20 Feb 2026 · 0 likes The opening post and I disagree about the size of the effect, not about the direction. Taking chargeback seriously for a moment rather than deflecting: the honest…
Why "dose equivalence" between different incretin analogues is a weak concept Replied, post #83 · Practice › Dosing & titration · 19 Feb 2026 · 0 likes The most common practical error is not the schedule at all — it is losing track of which step you are on after a break, and then resuming at the top rather than…
Interpreting a result that disagrees with the supplier's certificate Replied, post #115 · Sourcing › Independent verification · 9 Feb 2026 · 2 likes This settles it for me, at least until somebody posts a reason it should not.
Heterogeneity as information rather than as a nuisance Replied, post #95 · Evidence › Meta-analyses · 8 Feb 2026 · 29 likes Post #93 and I disagree about the size of the effect, not about the direction. The thing about heterogeneity that took me longest to accept is that a plausible…
[2026 update] Confounding by indication, explained with a concrete example Replied, post #21 · Evidence › Study critique · 2 Feb 2026 · 1 like I had written a reply contradicting post #17 and deleted it. Here is what survived. Per-protocol and intention-to-treat analyses answer different questions and neither…
Muscle cramps: the ordinary causes before the exotic ones Replied, post #6 · Practice › Side effects · 12 Jan 2026 · 0 likes The arithmetic in post #5 is right; the assumption feeding it is the part to check. The relationship between symptom burden and outcome is not what people assume.…
A widely repeated interaction claim that turns out to be unsupported Replied, post #17 · Practice › Interactions · 6 Jan 2026 · 0 likes Understood. Thank you for being specific about the limits of it.
Coming back to: Private prescribing in the UK: what is actually involved Replied, post #41 · Regional › UK & Ireland · 6 Jan 2026 · 0 likes Post #39 describes the usual case. This is about the unusual one. The useful distinction on Private prescribing is between what was measured and what was inferred from…
Reverse causation in a cohort study of weight and outcome Replied, post #4 · Evidence › Study critique · 26 Dec 2025 · 0 likes Multiple comparisons: if a paper reports many outcomes, the chance of a spurious association by random chance is real. Pre-specification of primary outcomes matters and…
Research-use-only labelling: what it means and what it does not Replied, post #74 · Sourcing › Regulatory · 17 Dec 2025 · 8 likes Adding the measurement that post #72 says would settle it. Two sentences on research-use-only labelling and then I will stop, because the rest is speculation and the…
Dead volume across syringe and needle combinations Replied, post #39 · Devices › Syringes & needles · 16 Dec 2025 · 12 likes Coring the stopper is a real phenomenon with repeated entries at the same point and blunt needles. Varying the entry point slightly and using a fresh needle prevents…
Interpreting a result that disagrees with the supplier's certificate Replied, post #42 · Sourcing › Independent verification · 13 Dec 2025 · 1 like Sensible. I would want the same detail before I acted on it either.
Second pass at: Metformin co-administration and additive GI effects Replied, post #12 · Practice › Interactions · 30 Nov 2025 · 7 likes A request rather than an answer: could whoever has the primary source for Metformin co-administration post it? I have seen the claim three times this month and each…
Follow-up: Constipation management, with a dietitian's contribution Replied, post #34 · Practice › Side effects · 25 Nov 2025 · 1 like Where I part company with post #32, and it is a narrow parting. Genuine question rather than a rhetorical one: has anyone here actually observed Constipation…
Sequence verification for an obscure compound: how it is done — what changed since Replied, post #33 · Compounds › Other compounds · 23 Nov 2025 · 10 likes Reading back through, this was answered upthread and I missed it. My fault.
Lurking for two months before posting: was that the right call? Replied, post #20 · Start Here › Welcome · 18 Nov 2025 · 12 likes Reading counts toward trust level, so lurking is not wasted. That is unusual and it is the reason the levels here track familiarity rather than volume. The claim is…
The 2.5 mg starting dose is not a therapeutic dose — why that matters — a second dataset Replied, post #6 · Compounds › Tirzepatide · 15 Nov 2025 · 22 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…
Pen dose counters: what a click does and does not guarantee Replied, post #5 · Devices › Pens & autoinjectors · 12 Nov 2025 · 24 likes This follows post #3 rather than contradicting it. Adding a reference point for pen dose counters. Mine is a single case, collected without controls, and I am posting…
Why an oral GLP-1 agonist is a formulation achievement more than a chemistry one Replied, post #34 · Compounds › Oral incretins · 7 Nov 2025 · 3 likes Missed doses behave differently for a daily oral than for a weekly injection. With a short interval you are near a trough rather than perturbing a slowly moving…
Reconciling a supplier certificate with an independent result Replied, post #24 · Sourcing › Vendor reports · 6 Nov 2025 · 0 likes Selective submission and selective reporting are the two easiest ways for a result to be shaped, and blinding addresses the first while a commitment to post addresses…
Research-use-only labelling: what it means and what it does not Replied, post #45 · Sourcing › Regulatory · 13 Oct 2025 · 1 like This is the sort of exchange that makes the archive worth searching.
A preprint whose numbers changed substantially at publication Replied, post #89 · Evidence › Preprints · 12 Oct 2025 · 11 likes I read post #86 twice before replying, because I had assumed the opposite. Peer review catches some things reliably — missing methods, unsupported conclusions,…
Half-life, steady state, and accumulation worked through — a second dataset Started this topic · Pharmacology › Pharmacokinetics · 4 Oct 2025 · 3 likes Half-life, steady state, and accumulation worked through — a second dataset — setting out what I have, and where I think it stops being reliable. Working through the…
Second pass at: The mass-error checker and its intended scope Replied, post #26 · Data & Tools › Calculators · 27 Sep 2025 · 4 likes Reporting rather than recommending, on mass-error checker. What happened is above. Whether it should have is a different question and not one I am qualified to answer.
Column chemistry choices for a 40-residue peptide Replied, post #43 · Analytics › HPLC & UHPLC · 22 Sep 2025 · 16 likes Column temperature affects retention and selectivity and is omitted from most certificates. Two runs at twenty-five and forty degrees are not the same method. The…
Hepatic impairment and the absence of data Replied, post #35 · Clinical › Special populations · 15 Sep 2025 · 0 likes Genetic and ancestry-related differences in response are asked about regularly and the published evidence is thin enough that the honest answer is short. Filing this…
When a preprint is the best available evidence and we say so Replied, post #138 · Evidence › Preprints · 4 Sep 2025 · 14 likes The bit of preprint that nobody enjoys is that the answer changes depending on what you are trying to decide with it. Say what the decision is and the thread will…
Managing an unplanned gap in supply — what changed since Replied, post #51 · Access › Shortages · 31 Aug 2025 · 0 likes Where a shortage forces a gap, the pharmacokinetics mean a missed week is a perturbation rather than a reset, which is worth knowing.
Revisiting: Reading a denial letter as a specification for your appeal Replied, post #90 · Access › Insurance & coverage · 22 Aug 2025 · 29 likes A clinician's supporting letter that addresses the criteria explicitly is worth considerably more than one that describes the patient generally.
Pinch or no pinch, and how needle length changes the answer Replied, post #21 · Practice › Administration · 16 Aug 2025 · 28 likes If you have to inject at a different time of day than usual, that is a much smaller perturbation than it feels for a weekly compound with a week-long half-life. Not…
Journal club: STEP-HFpEF and symptom endpoints — a second dataset Started this topic · Evidence › Journal club · 13 Aug 2025 · 10 likes On the subject in the title: Journal club: STEP-HFpEF and symptom endpoints — a second dataset Working notes rather than a conclusion. Posting a small dataset on…
Second pass at: Coverage in the US: a map of the usual obstacles Replied, post #2 · Regional › North America · 11 Aug 2025 · 12 likes Worth separating two things that the opening post runs together. United States: FDA licenses compounds. Prescribing and pharmacy practice are state-regulated. Compounds…
Follow-up: History of disordered eating and why it changes the conversation Replied, post #56 · Clinical › Special populations · 8 Aug 2025 · 1 like What would change my mind on History of disordered eating is a second dataset collected by someone with no stake in the first. Until then I hold it loosely and I would…
Follow-up: Journal club: orforglipron phase 2 and the non-peptide question Replied, post #4 · Evidence › Journal club · 6 Aug 2025 · 9 likes Reading order that works for these sessions: registry entry, methods, baseline table, primary result, then abstract last. Reading the abstract first anchors everything…
A ten-fold dose error caught before injection — one year on Replied, post #116 · Devices › Syringes & needles · 4 Aug 2025 · 8 likes Posting my ten-fold dose error caught numbers with the method attached so they can be discounted properly. Uncontrolled, unblinded, and collected by someone who wanted…
Thyroid function tests during substantial weight change Replied, post #16 · Clinical › Bloodwork · 29 Jul 2025 · 11 likes The arithmetic in post #14 is right; the assumption feeding it is the part to check. Taking thyroid function tests during substantial seriously for a moment rather than…
The C-cell question: rodent findings and their human context Replied, post #41 · Compounds › Semaglutide · 21 Jul 2025 · 1 like This follows post #39 rather than contradicting it. On c-cell question the community has more anecdote than the confidence in this thread implies, and I include my own…
A field-by-field walk through a certificate of analysis Replied, post #43 · Analytics › COA interpretation · 15 Jul 2025 · 25 likes Since field-by-field walk through a certificate keeps coming up, it should probably be a maintained page rather than a recurring thread. I am happy to draft it if…
Subcutaneous absorption kinetics and site differences Replied, post #15 · Pharmacology › Pharmacokinetics · 14 Jul 2025 · 11 likes Subcutaneous absorption is the rate-limiting step for most of these compounds, which is why the apparent half-life is absorption-limited rather than…
Substitution between formats during a shortage Replied, post #22 · Access › Shortages · 13 Jul 2025 · 1 like Pharmacy-level availability varies enormously during a shortage, so two honest accounts from the same city can be opposite. The interesting part of this is the…
Interim analyses and stopping rules — does this still hold? Replied, post #24 · Evidence › Trials · 1 Jul 2025 · 23 likes Answering the question post #20 raises rather than the one it answers. Interim analyses and stopping rules has been discussed here with more heat than it deserves,…
Second pass at: Triple agonism: additive, synergistic, or neither? Replied, post #72 · Compounds › Retatrutide · 30 Jun 2025 · 19 likes Practical note on Triple agonism: write down what you expect before you look. The number of times I have found what I went looking for is higher than chance would allow.
Hepatic steatosis: what the MASH trial evidence supports Replied, post #78 · Clinical › Comorbidities · 29 Jun 2025 · 1 like Gastrointestinal conditions interact with a mechanism that slows gastric emptying in ways that are plausible and largely unstudied. One case, stated as one case.
Repeatability versus intermediate precision Replied, post #98 · Analytics › Method validation · 29 Jun 2025 · 28 likes What would change my mind on repeatability versus intermediate precision is a second dataset collected by someone with no stake in the first. Until then I hold it…
Comparators chosen for regulatory reasons rather than clinical ones — one year on Replied, post #58 · Evidence › Trials · 21 Jun 2025 · 12 likes Absolute and relative effects answer different questions. Write down the event rate in each arm and the difference between them; everything quotable is derived from…
What a documentation review can and cannot tell you Replied, post #8 · Sourcing › Independent verification · 17 Jun 2025 · 6 likes What a supplier does when asked is itself information, and it is information that a chromatogram cannot provide.
[2026 update] Citation sweep results: how many references did not say what was claimed Replied, post #35 · Meta › Wiki maintenance · 10 Jun 2025 · 7 likes Two sentences on Citation sweep results and then I will stop, because the rest is speculation and the thread is better without mine. What is documented is narrow. What…
Coming back to: Getting a referral rather than a refusal Replied, post #37 · Clinical › Prescriber conversations · 6 Jun 2025 · 31 likes A question phrased as "what would you want to see before considering X" is answerable and is not a request for X.
Follow-up: What other technical communities get right that we do not Replied, post #114 · Lounge › Off topic · 30 May 2025 · 15 likes Not a technical point, just an observation: the register here holds because people correct themselves in public and nobody scores points off it. That is rarer than the…
Second pass at: A history of disordered eating: proceeding carefully Replied, post #60 · Wellbeing › Mental health · 30 May 2025 · 0 likes An update on my earlier history of disordered eating post: the pattern held for another six weeks and then stopped, which I did not predict and cannot explain.
Splitting a vial for two laboratories: how to do it without ruining both Replied, post #46 · Sourcing › Independent verification · 24 May 2025 · 19 likes Confirming post #44 from a second method, which matters more than confirming it from a second person. Verification records are dated because they expire in usefulness.…
[2026 update] Dose numbers across compounds are not on the same scale Replied, post #15 · Practice › Dosing & titration · 24 May 2025 · 0 likes Writing down the date, the dose and the site each week takes fifteen seconds and is the single most useful record anyone here keeps. Memory reconstructs a titration…
Travel coolers and how long they really hold — the long version Replied, post #19 · Devices › Cold chain · 22 May 2025 · 16 likes Confirming post #16 from a second method, which matters more than confirming it from a second person. Do not judge cold-chain performance from a single delivery in…
Journal club: STEP 4 and what a withdrawal design can prove Replied, post #43 · Evidence › Journal club · 21 May 2025 · 3 likes The question underneath STEP 4 is usually "how would I tell?" rather than "what is true?", and that one has a method attached to it. Write down what you would expect to…
Storing a pen in use versus a pen unopened Replied, post #12 · Devices › Pens & autoinjectors · 7 May 2025 · 6 likes Dose counters: pens show the remaining number of doses. When the counter reaches zero, the pen is empty and cannot deliver more. Noting the counter before injection…
A ten-fold dose error caught before injection Replied, post #23 · Devices › Syringes & needles · 20 Apr 2025 · 3 likes Reading units correctly: look at the marking from the side, not from above or below. The bottom of the plunger tip is the reading. Parallax error (wrong angle) is a…
Retatrutide dose escalation in the published trials Replied, post #111 · Compounds › Retatrutide · 10 Apr 2025 · 9 likes Worth separating retatrutide dose escalation as a question about the compound from retatrutide dose escalation as a question about the documentation. They get answered…
Carryover and the ghost peak from last week's standard Replied, post #35 · Analytics › HPLC & UHPLC · 5 Apr 2025 · 21 likes The documentation on carryover is better than this thread and I say that as someone who has posted in the thread.
Coverage for the indication versus for the drug — a second dataset Replied, post #39 · Access › Insurance & coverage · 24 Mar 2025 · 0 likes Small correction to my own earlier position on Coverage. I had the units the wrong way round, which changes the conclusion by an order of magnitude and therefore…
Adducts: sodium, potassium, and the peak you did not expect Replied, post #39 · Analytics › Mass spectrometry · 19 Mar 2025 · 8 likes Resolution: "high resolution" commonly means I would put the burden of proof on the interesting explanation, not the dull one.
What the published dose-response for semaglutide actually looks like above 2.4 mg — a… Replied, post #104 · Compounds › Semaglutide · 16 Mar 2025 · 0 likes The honest answer on published dose-response for semaglutide is that it depends, and the useful part is the list of what it depends on. Four items, in rough order of…
Biased agonism: a real phenomenon, an over-used explanation Replied, post #82 · Pharmacology › Receptor biology · 12 Mar 2025 · 0 likes Glucose dependence is the property that distinguishes incretin-mediated insulin secretion from a sulfonylurea. It is also why hypoglycaemia risk from these compounds…
Pharmaceutical compounding rules, summarised from primary sources Replied, post #90 · Sourcing › Regulatory · 3 Mar 2025 · 9 likes Post #89 is the version of this I will quote in future. One addition. Nothing in this subcategory is legal advice, and the members who work in regulated environments…
Pharmaceutical compounding rules, summarised from primary sources Replied, post #3 · Sourcing › Regulatory · 26 Feb 2025 · 0 likes Useful. I have added it to my own notes with the date on it.
Request declined, with reasoning Started this topic · Meta › Feature requests · 19 Feb 2025 · 53 likes Request declined, with reasoning — setting out what I have, and where I think it stops being reliable. I would like to know what people here actually do about request…
Random versus fixed effects: choosing rather than defaulting — a second dataset Replied, post #39 · Evidence › Meta-analyses · 2 Feb 2025 · 3 likes Adding a null result on Random versus fixed effects. I looked, carefully, and found nothing, and null results deserve posting precisely because they never are.
When "no data" is the complete and final answer Replied, post #78 · Compounds › Other compounds · 29 Jan 2025 · 0 likes Thymosin alpha-1 has a regulatory history in several jurisdictions and a real clinical literature, which puts it in a different evidential category from most of its…
Second pass at: Certificates issued by the seller versus by a laboratory Replied, post #55 · Analytics › COA interpretation · 25 Jan 2025 · 10 likes The distinction between release testing and characterisation is one industrial documents make and retail ones usually do not. It is the difference between "we tested…
A 10 mg vial reconstituted three different ways, compared — the long version Replied, post #3 · Practice › Reconstitution · 19 Jan 2025 · 0 likes Swirling versus inverting versus leaving it alone: the vial can be gently warmed (hands around it) and swirled with a rolling motion. Vigorous shaking introduces air…
What the published dose-response for semaglutide actually looks like above 2.4 mg — a… Replied, post #32 · Compounds › Semaglutide · 19 Jan 2025 · 0 likes Second-hand on published dose-response for semaglutide, so weight it accordingly — someone whose method I trust told me this and I have not verified it myself.
Reconstituting a multi-strength kit without mixing yourself up Replied, post #20 · Practice › Reconstitution · 11 Jan 2025 · 0 likes Two things can be true about reconstituting a multi-strength kit at once: the mechanism is plausible and the evidence for the size of the effect is thin. Most of the…
Second pass at: Gauge and length selection for subcutaneous injection Replied, post #8 · Devices › Syringes & needles · 10 Dec 2024 · 0 likes Answering the question post #6 raises rather than the one it answers. Counterpoint on Gauge and length selection, offered without confidence: the same observation is…
Reading a preclinical wound-healing model and its relevance to a human tendon Replied, post #136 · Compounds › Repair & healing peptides · 24 Nov 2024 · 31 likes Everything in post #134 holds. The case it does not cover is the one I have. What I would check first on reading a preclinical wound-healing model is whether the thing…
Revisiting: Completing a dose with a second syringe, and the dead-volume arithmetic Started this topic · Practice › Administration · 22 Nov 2024 · 58 likes Revisiting: Completing a dose with a second syringe, and the dead-volume arithmetic Writing it up because I had to work it out twice and would rather nobody else did. I…
Meeting a protein target on a suppressed appetite — does this still hold? Replied, post #11 · Nutrition & Training › Protein & intake · 19 Nov 2024 · 20 likes Worth separating two things that post #8 runs together. Timing of protein: spreading protein intake across the day, with some at each meal, is more practical than…
Coming back to: Preparing for an appointment: one page, three questions Replied, post #101 · Clinical › Prescriber conversations · 16 Nov 2024 · 29 likes Everything in post #97 holds. The case it does not cover is the one I have. Bringing a record of symptoms with dates and severities makes an assessment materially…
Second pass at: Hoarding and why it makes a shortage worse Replied, post #79 · Access › Shortages · 12 Oct 2024 · 0 likes Building on post #76 rather than restating it. Regional differences during a shortage are large, and a supply position in one country says nothing about another. I…
Requesting a page: what makes a good request — what changed since Replied, post #44 · Documentation › Wiki requests · 10 Oct 2024 · 21 likes A page that would need to be rewritten every quarter is usually better as a topic with a good marked solution. Adding the caveat now so it does not have to be extracted…
Coming back to: The nausea timeline across the first four weeks, with a tabulated log Replied, post #17 · Practice › Side effects · 30 Sep 2024 · 16 likes Post #13 put the caveat in the right place and I want to underline it. Injection site reaction: local erythema, nodules, or induration at injection sites is reported by…
[2026 update] Journal club: SURPASS-2 and the semaglutide 1 mg comparator Started this topic · Evidence › Journal club · 28 Sep 2024 · 43 likes Journal club: SURPASS-2 and the semaglutide 1 mg comparator Writing it up because I had to work it out twice and would rather nobody else did. Session topic: SURPASS-2…
SURPASS-2 and the comparator dose question that will not go away Replied, post #20 · Compounds › Tirzepatide · 22 Sep 2024 · 7 likes Small methodological point on SURPASS-2: repeating a measurement is cheap and resolves most of what is being argued about here at no cost to anyone.
The C-cell question: rodent findings and their human context — what changed since Replied, post #48 · Compounds › Semaglutide · 12 Sep 2024 · 1 like Post #45 is right about the mechanism and I think understates the practical bit. Answering the c-cell question question as asked, then the question I think is meant. As…
Coming back to: The nausea timeline across the first four weeks, with a tabulated log Replied, post #10 · Practice › Side effects · 25 Aug 2024 · 26 likes Worth separating nausea timeline as a question about the compound from nausea timeline as a question about the documentation. They get answered by different people and…
Follow-up: Dead volume across syringe and needle combinations Replied, post #21 · Devices › Syringes & needles · 14 Aug 2024 · 11 likes Worth separating two things that post #20 runs together. Needle gauge: smaller numbers (30G) are finer and less painful. Larger numbers (25G) are courser. For…
Second pass at: Retatrutide dose escalation in the published trials Replied, post #92 · Compounds › Retatrutide · 22 Jul 2024 · 27 likes Worth separating two things that post #90 runs together. Anyone deciding on the basis of what is published should know that what is published is a phase 2 programme and…
Oral contraceptives and delayed emptying: what the data shows Replied, post #66 · Practice › Interactions · 18 Jul 2024 · 22 likes Oral medications versus time: if you take an oral medication 30 minutes before semaglutide (which slows gastric emptying), the delayed stomach emptying affects when and…
Splitting a weekly dose in two: the pharmacokinetic argument against — the long version Replied, post #101 · Practice › Dosing & titration · 9 Jul 2024 · 8 likes Second this, and I would have said it less carefully.
Cold packs, phase-change material, and what survives ten days Replied, post #85 · Sourcing › Logistics · 9 Jul 2024 · 0 likes Post #81 put the caveat in the right place and I want to underline it. Photographing the parcel on arrival before opening it takes ten seconds and is the difference…
Assessing a warm arrival: the decision process — one year on Replied, post #41 · Sourcing › Logistics · 30 May 2024 · 26 likes Reframing Assessing a warm arrival slightly, because I think the disagreement is about the question rather than the answer. If the question is "does it happen", yes. If…