k.farrugia

TL3 Regular · Thessaloniki, GR

Journal club attendee. Interested in trial design more than in trial conclusions.

Joined 31 December 2024 · last posted 2d · groups: journal-club

142 posts, newest first. Showing up to 150.

CJC-1295 with and without DAC: what the modification does Replied, post #123 · Compounds › Secretagogues & GH axis · 26 Jul 2026 · 22 likes Post #121 put the caveat in the right place and I want to underline it. Reading this CJC-1295 thread as someone who came in with a fixed view: the third and seventh…
Priming a pen and whether the primed volume is wasted Replied, post #22 · Devices › Pens & autoinjectors · 24 Jul 2026 · 1 like Some pens indicate remaining doses and some do not, and reading the residual volume by eye through a window is unreliable at the end of a cartridge. I would treat the…
Reading order for a first week here, and what to skip until later — what changed since Replied, post #74 · Start Here › Welcome · 23 Jul 2026 · 1 like My position on Reading order is current rather than settled. I have revised it once already and I expect to again, so treat it accordingly.
Semaglutide formulation: what is in the licensed product besides the peptide Replied, post #33 · Compounds › Semaglutide · 20 Jul 2026 · 1 like Narrowing post #30, because the general version has more than one answer. The practical version of semaglutide formulation is three sentences long. The rigorous version…
Seven-day rolling means and why weekly readings mislead Replied, post #42 · Outcomes › Progress reports · 16 Jul 2026 · 0 likes On seven-day rolling, I would rather understate and be corrected upward than overstate and be quoted. That is a house style here and it is a good one.
How shortages have affected compounding permissions Replied, post #42 · Access › Shortages · 16 Jul 2026 · 1 like Reading this shortages thread as someone who came in with a fixed view: the third and seventh replies moved me and the confident ones did not.
Pancreatitis history and the risk calculus Replied, post #29 · Safety › Contraindications · 16 Jul 2026 · 10 likes Post #26 is the version of this I will quote in future. One addition. Diabetic retinopathy complications: a signal for this was noted in SUSTAIN 6. Current evidence is…
What consumer-accessible tests can and cannot determine — a second dataset Replied, post #71 · Analytics › Home & field testing · 10 Jul 2026 · 0 likes Reading rather than answering, but this is the post I would point somebody at.
Historical amylin analogues and what happened to them Replied, post #29 · Compounds › Cagrilintide & amylin analogues · 9 Jul 2026 · 8 likes Nausea profile of amylin analogues: the historical agent pramlintide required multiple daily doses and had a difficult tolerability profile. A weekly formulation is a…
A site rotation scheme that is easy enough to actually follow Replied, post #109 · Practice › Administration · 8 Jul 2026 · 2 likes Rotate on a fixed sequence rather than choosing each week. A sequence you follow beats a scheme you improvise, and it produces a record you can read back. Take it as a…
Stepping down deliberately, and how to do it without losing progress — what changed since Replied, post #22 · Practice › Dosing & titration · 28 Jun 2026 · 0 likes A titration plan written down in advance is easier to stick to and easier to abandon deliberately. An improvised one becomes a series of decisions made on the worst day…
GHRH analogues versus ghrelin mimetics: different mechanisms, conflated discussion Replied, post #31 · Compounds › Secretagogues & GH axis · 26 Jun 2026 · 1 like Worth separating two things that post #29 runs together. On analysis: these are short peptides and generally straightforward chromatographically, which means a poor…
Why the timeline is on the right and not the left — what changed since Replied, post #62 · Meta › Site feedback · 26 Jun 2026 · 31 likes Reporting a real defect: on a long topic the jump-to-post link scrolls to the right post but the highlight does not fire on the first load. Second load is fine.…
I have no scientific background — can I still follow the analytics categories? Replied, post #26 · Start Here › Welcome · 25 Jun 2026 · 0 likes Worth knowing early: the archive is not retrospectively corrected. A topic from two years ago was accurate when written and may not be now. Every post carries its date…
GLP-1 receptor distribution: central and peripheral Replied, post #76 · Pharmacology › Receptor biology · 24 Jun 2026 · 17 likes Building on post #75 rather than restating it. In vitro potency and clinical potency are related by a long chain of assumptions. A compound more potent at the receptor…
Secretagogues and glucose tolerance: the mechanistic concern Replied, post #43 · Compounds › Secretagogues & GH axis · 21 Jun 2026 · 11 likes I will take the caveat as seriously as the claim, which is the point of putting it there.
Named, unnamed and unspecified impurities as regulatory categories — the long version Replied, post #12 · Analytics › Impurities & related substances · 20 Jun 2026 · 14 likes Related substances: compounds chemically related to the target peptide but not the target peptide itself. The standard method separates them and reports them as area…
[2026 update] A vial that will not fully dissolve: what to check and in what order Replied, post #111 · Practice › Reconstitution · 16 Jun 2026 · 0 likes Confirming post #108 from a second method, which matters more than confirming it from a second person. Arithmetic step by step: a 5 mg vial with 2 mL of diluent gives…
Secretagogues and glucose tolerance: the mechanistic concern Replied, post #36 · Compounds › Secretagogues & GH axis · 15 Jun 2026 · 25 likes Sermorelin and the growth hormone releasing hormone analogues depend on a functioning pituitary response, which is the mechanistic reason they behave differently in…
Trust level 3 requirements: a clarification — does this still hold? Replied, post #62 · Meta › Announcements · 10 Jun 2026 · 8 likes I had written a reply contradicting post #58 and deleted it. Here is what survived. The rare case here is the one that costs somebody a week, though, and the common…
Lean mass preservation: what the evidence supports — does this still hold? Replied, post #86 · Outcomes › Body composition · 31 May 2026 · 0 likes Lean mass in these measurements includes water, so a change in hydration appears as a change in lean mass. The confident version of this sentence would be wrong, so…
Reflectance and photometric devices: precision in practice — a second dataset Replied, post #39 · Analytics › Home & field testing · 30 May 2026 · 15 likes Fair, and the limits you put on it are the part I will remember.
Packaging that arrived damaged: documenting it properly Replied, post #14 · Sourcing › Logistics · 24 May 2026 · 0 likes Answering the question post #12 raises rather than the one it answers. Anyone deciding whether a delay is a problem should ask what would change if they waited another…
Revisiting: Liver enzymes drifting down and what that usually means Replied, post #33 · Clinical › Bloodwork · 17 May 2026 · 3 likes Reading back through, this was answered upthread and I missed it. My fault.
Semaglutide formulation: what is in the licensed product besides the peptide Replied, post #10 · Compounds › Semaglutide · 15 May 2026 · 1 like Picking up post #8: that is the part I would want checked first. Solutions of semaglutide can look faintly opalescent without anything being wrong. Visible particulate,…
[2026 update] Are there stupid questions here? A staff answer, at length Replied, post #34 · Start Here › Welcome · 9 May 2026 · 23 likes Seconded. It reads as careful rather than confident, which is the right register.
Follow-up: Comparing two chromatograms from different laboratories, properly Replied, post #23 · Analytics › HPLC & UHPLC · 7 May 2026 · 2 likes On post #19 — agreed on the reasoning, with one qualification. Peaks that do not elute do not appear in the area percentage. Aggregates and strongly retained species…
Moderation log format change Replied, post #49 · Meta › Announcements · 1 May 2026 · 6 likes One question about the transition rather than the policy: what happens to topics that are in flight when it takes effect? The announcement is clear about posts and…
Why the absence of controlled human data on BPC-157 matters more than people admit Replied, post #18 · Compounds › Repair & healing peptides · 29 Apr 2026 · 3 likes Adding the measurement that post #17 says would settle it. The absence of human trials means there is no established dose, no established interval and no established…
Follow-up: Reconciling a label claim with a content assay Replied, post #17 · Analytics › COA interpretation · 28 Apr 2026 · 4 likes Post #14 is right about the mechanism and I think understates the practical bit. For anyone finding this later: the short answer on Reconciling a label claim is that it…
Coming back to: Measurement error in a self-reported exposure Replied, post #25 · Evidence › Study critique · 28 Apr 2026 · 0 likes Practical note on Measurement error: 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…
Follow-up: Tirzepatide and nausea: is the profile genuinely different or just… Replied, post #3 · Compounds › Tirzepatide · 26 Apr 2026 · 0 likes Tirzepatide and nausea has a well-known answer and a correct answer, and the interesting work is establishing that they are the same. Nobody has done that here yet.
Pregnancy and pregnancy planning: contraindication and washout Replied, post #122 · Clinical › Special populations · 24 Apr 2026 · 0 likes The confident answers on pregnancy and pregnancy planning and the well-sourced answers are not the same answers, which is the most useful thing I have learned reading…
Follow-up: State-level differences that actually matter Replied, post #6 · Regional › North America · 3 Apr 2026 · 2 likes Where a manufacturer runs a direct supply route, that is a commercial arrangement rather than a regulatory change, and it can end.
Five questions in one post gets you one answer — how to split them Replied, post #46 · Start Here › How to Ask · 3 Apr 2026 · 1 like If the answer you got does not fit your case, say which part does not fit rather than restating the question. Otherwise the next reply is the same as the last one.…
Grapefruit: why this class is not the class that cares Replied, post #52 · Practice › Interactions · 18 Mar 2026 · 32 likes Answering the question post #48 raises rather than the one it answers. I keep a log for grapefruit specifically because my memory of it turned out to be systematically…
Research-use-only status: what it means legally and practically Replied, post #15 · Compounds › Other compounds · 16 Mar 2026 · 1 like That is a cleaner way of putting what I was circling around.
Introducing myself: pharmacist, sceptic, reluctant participant — one year on Replied, post #61 · Lounge › Introductions · 14 Mar 2026 · 0 likes There is: the practice category, and the calculators, both written for exactly that. Nothing there assumes chemistry, and the maintained documents show their working so…
Introducing myself: pharmacist, sceptic, reluctant participant — one year on Replied, post #14 · Lounge › Introductions · 8 Mar 2026 · 32 likes If you are arriving from somewhere louder, the pace here will feel slow. A topic can sit for two days and then get a reply that is worth the wait. That is the design…
Guidelines revision: what changed and why — one year on Replied, post #78 · Meta › Announcements · 5 Mar 2026 · 15 likes A note on how Guidelines revision gets discussed rather than on Guidelines revision itself: the confident posts get the replies and the careful ones get ignored, and…
Drawing up with one needle and injecting with another Started this topic · Practice › Administration · 23 Feb 2026 · 0 likes On the subject in the title: Drawing up with one needle and injecting with another Working notes rather than a conclusion. A question about technique rather than about…
Anxiety in the first weeks: drug, situation, or both — what changed since Replied, post #95 · Wellbeing › Mental health · 22 Feb 2026 · 0 likes The social side of this — how other people respond to visible change — comes up constantly and has nothing to do with pharmacology. Speaking for myself and not for…
Waist circumference technique and its repeatability Replied, post #53 · Outcomes › Progress reports · 18 Feb 2026 · 17 likes The arithmetic in post #52 is right; the assumption feeding it is the part to check. The best progress reports here read as records rather than as arguments, and that…
Reused chromatograms across lots: how to spot it — what changed since Replied, post #18 · Analytics › COA interpretation · 17 Feb 2026 · 16 likes On Reused chromatograms across lots, 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 of the…
Documenting a payment dispute without naming and shaming Replied, post #3 · Sourcing › Payments · 13 Feb 2026 · 8 likes Chargeback reality: if you pay by credit card and the supplier does not deliver, you can attempt a chargeback. Suppliers know this and many require non-chargeable…
Seven-day rolling means and why weekly readings mislead — one year on Replied, post #42 · Outcomes › Progress reports · 12 Feb 2026 · 12 likes Answering the question post #40 raises rather than the one it answers. If a pattern survives a rolling-mean treatment it is worth explaining. Most do not, and that is…
Trifluoroacetate content and its consequences Replied, post #97 · Analytics › Impurities & related substances · 6 Feb 2026 · 0 likes Trying to state the trifluoroacetate content position in a way that someone who disagrees would recognise as fair, because I do not think the version in this thread…
Injection discomfort: needle gauge, volume, temperature, technique Replied, post #21 · Practice › Administration · 1 Feb 2026 · 15 likes Bleeding at the site is common and unremarkable at these needle gauges. Persistent bruising in the same area repeatedly is worth a change of technique or of site rather…
Ultrasound and skinfolds: operator dependence in practice — what changed since Replied, post #12 · Outcomes › Body composition · 31 Jan 2026 · 0 likes Picking up post #9: that is the part I would want checked first. Where I have landed on Ultrasound and skinfolds, having got it wrong once in public: the direction is…
Research-use-only status: what it means legally and practically Started this topic · Compounds › Other compounds · 30 Jan 2026 · 0 likes Research-use-only status: what it means legally and practically Writing it up because I had to work it out twice and would rather nobody else did. Asking about…
Stability of BPC-157 in solution: what has been measured — one year on Started this topic · Compounds › Repair & healing peptides · 16 Jan 2026 · 0 likes On the subject in the title: Stability of BPC-157 in solution: what has been measured — one year on Working notes rather than a conclusion. A narrow question about…
Promotion criteria, and the one that stops most nominations — the long version Replied, post #127 · Documentation › Doc review · 6 Jan 2026 · 1 like That matches what I have seen, for whatever a single anecdote is worth.
Amylin receptor signalling and satiety — what changed since Replied, post #12 · Pharmacology › Receptor biology · 4 Jan 2026 · 0 likes The arithmetic on Amylin receptor signalling and satiety is the easy part and it is where the errors are, which is an uncomfortable combination. Show your working and…
[2026 update] Reading a supplementary appendix and finding the interesting part Started this topic · Evidence › Trials · 28 Dec 2025 · 19 likes On the subject in the title: Reading a supplementary appendix and finding the interesting part Working notes rather than a conclusion. Collecting what is known about…
Injection discomfort: needle gauge, volume, temperature, technique Replied, post #8 · Practice › Administration · 24 Dec 2025 · 0 likes The practical value of a written technique note to yourself is that it survives a three-week gap. Everyone who has come back after a break has rediscovered something…
Semaglutide half-life: where the 165 to 184 hour figure comes from Replied, post #72 · Compounds › Semaglutide · 18 Dec 2025 · 4 likes The STEP programme populations were selected: enrollment criteria required baseline body mass index over 30, no recent blood pressure crisis, no recent retinopathy, no…
Reading an interaction checker output critically Replied, post #69 · Practice › Interactions · 18 Dec 2025 · 0 likes Where a published interaction study exists it usually reports an area-under-curve ratio, and that number is far more informative than a yes-or-no answer. I would not…
Revisiting: Journal club: SURMOUNT-1, read without the press release Replied, post #2 · Evidence › Journal club · 10 Dec 2025 · 18 likes Two people in this thread mean different things by SURMOUNT-1 and are disagreeing about the definition while believing they are disagreeing about the facts. Worth…
Tirzepatide in type 2 diabetes: the SURPASS programme, summarised honestly — the long… Replied, post #67 · Compounds › Tirzepatide · 9 Dec 2025 · 0 likes That is a cleaner way of putting what I was circling around.
Tirzepatide in type 2 diabetes: the SURPASS programme, summarised honestly — the long… Replied, post #16 · Compounds › Tirzepatide · 1 Dec 2025 · 30 likes Quietly grateful for the plain phrasing. Not every thread gets that.
Oral semaglutide bioavailability and its variability between people Replied, post #17 · Compounds › Oral incretins · 25 Nov 2025 · 2 likes Trial adherence in an oral trial with strict administration requirements is genuinely worse than trial-published data often suggests. That is why the exposure…
Revisiting: Aggregates and why a purity assay may miss them entirely Replied, post #11 · Analytics › Impurities & related substances · 15 Nov 2025 · 4 likes Two people in this thread mean different things by Aggregates and are disagreeing about the definition while believing they are disagreeing about the facts. Worth…
Thyroid function tests during substantial weight change Replied, post #131 · Clinical › Bloodwork · 12 Nov 2025 · 5 likes TSH and free hormones: TSH is a reasonable screening test but does not tell you about actual free hormone levels. If TSH is abnormal, free thyroid hormones confirm…
[2026 update] Splitting an overlong document into two Replied, post #49 · Documentation › Wiki requests · 11 Nov 2025 · 0 likes Splitting an overlong document has a well-known answer and a correct answer, and the interesting work is establishing that they are the same. Nobody has done that here…
[2026 update] What steady state means for the decision to escalate Replied, post #56 · Practice › Dosing & titration · 11 Nov 2025 · 1 like Post #54 and I disagree about the size of the effect, not about the direction. Concentration and dose get conflated constantly in this subcategory. Changing how much…
Coming back to: Why most self-reports here are not experiments, and that is fine Replied, post #13 · Research Methods › N-of-1 designs · 20 Oct 2025 · 23 likes Post #11 answers the question as asked. The question underneath it is different. Sample size in n-of-1: you are the sample. Repeated measurements (weekly weighings,…
New subcategory: rationale and scope Replied, post #38 · Meta › Announcements · 16 Oct 2025 · 0 likes This follows post #37 rather than contradicting it. Worth saying publicly: stepping back cleanly and handing over is a service. Documents with an absent maintainer go…
Availability by country, dated, with primary sources Replied, post #20 · Access › International · 14 Oct 2025 · 1 like Post #19 is right about the mechanism and I think understates the practical bit. Import rules for personal use: what you can import for personal use depends on your…
Airline travel with a temperature-sensitive injectable — what changed since Replied, post #87 · Devices › Cold chain · 8 Oct 2025 · 0 likes Post #83 put the caveat in the right place and I want to underline it. Posting my Airline travel numbers with the method attached so they can be discounted properly.…
Sleep quality changes during weight loss — what changed since Replied, post #12 · Wellbeing › Sleep · 29 Sep 2025 · 0 likes When sleep problems need attention: if sleep does not improve as weight loss continues or if it worsens, discussing with a clinician is prudent. Sleep disorders are…
Which panel is worth repeating and which is worth ignoring Replied, post #123 · Clinical › Bloodwork · 28 Sep 2025 · 26 likes Post #120 is the version of this I will quote in future. One addition. Adding a null result on panel. I looked, carefully, and found nothing, and null results deserve…
What a purity-only report leaves out Replied, post #18 · Sourcing › Independent verification · 18 Sep 2025 · 7 likes Confirming post #17 from a second method, which matters more than confirming it from a second person. Answering the purity-only question as asked, then the question I…
Which panel is worth repeating and which is worth ignoring Replied, post #112 · Clinical › Bloodwork · 16 Sep 2025 · 2 likes Adding the measurement that post #111 says would settle it. Lipid changes during substantial weight loss are expected and their trajectory is not always monotonic. A…
Discussing something you have already been doing Replied, post #5 · Clinical › Prescriber conversations · 15 Sep 2025 · 16 likes Post #3 is the version of this I will quote in future. One addition. Prescription logistics: confirm whether it will be filled locally, requires mail order, or will be…
Aggregated purity results across four services, with caveats — a second dataset Replied, post #82 · Data & Tools › Datasets · 9 Sep 2025 · 0 likes Where the Aggregated purity results across four discussion usually stalls is that nobody wants to say "I do not know" and everyone is willing to say "it varies". Those…
Aggregated purity results across four services, with caveats — a second dataset Replied, post #63 · Data & Tools › Datasets · 8 Sep 2025 · 15 likes The most useful dataset this community could hold is boring: lot, supplier, service, method, date, result. That is enough to answer most of the questions people ask…
Confounding by indication, explained with a concrete example Replied, post #20 · Evidence › Study critique · 2 Sep 2025 · 4 likes Statistical significance and clinical importance are different and both are needed. A significant difference below the minimal important difference is a real finding of…
Pages past their review date, listed Replied, post #22 · Meta › Wiki maintenance · 25 Aug 2025 · 0 likes Adding a data point of agreement rather than a data point.
Tirzepatide molecular mass and the charge states you would expect on ESI Replied, post #11 · Compounds › Tirzepatide · 25 Aug 2025 · 0 likes Picking up post #10: that is the part I would want checked first. Dual agonism versus dose: how much of tirzepatide's effect is the GIP component and how much is simply…
Coming back to: What published stability data actually covers, and what it does not Replied, post #120 · Practice › Storage & stability · 22 Aug 2025 · 6 likes Useful. I have added it to my own notes with the date on it.
[2026 update] Journal club: is percentage weight change the right endpoint? Replied, post #72 · Evidence › Journal club · 20 Aug 2025 · 0 likes Picking up post #71: that is the part I would want checked first. SURMOUNT-1 (N Engl J Med 2022): Tirzepatide obesity trial. The largest mean weight reduction for a…
[2026 update] Journal club: is percentage weight change the right endpoint? Replied, post #36 · Evidence › Journal club · 14 Aug 2025 · 1 like Where the group cannot agree, record the disagreement rather than resolving it by seniority. The recorded disagreement is more honest and more useful later.
Revisiting: Why a compound being unapproved is not the same as being illegal to possess Replied, post #75 · Sourcing › Regulatory · 10 Aug 2025 · 18 likes Coming back to post #73, because the follow-up matters more than the original answer. Approval versus licensing: a compound can be approved for a specific indication in…
Second pass at: Why this subcategory is stricter about sourcing than most Replied, post #39 · Compounds › Secretagogues & GH axis · 6 Aug 2025 · 28 likes Reconstitution volumes in this family are often small enough that dead volume in the syringe is a meaningful fraction of the dose. A fixed-needle insulin syringe is…
"Greater than or equal to 99%" as a specification rather than a result Replied, post #12 · Analytics › COA interpretation · 27 Jul 2025 · 8 likes Worth separating two things that post #8 runs together. A chromatogram supplied as a small image is legible for peak shape and not for baseline detail. That is enough…
TB-500 and thymosin beta-4: the fragment versus the protein Replied, post #75 · Compounds › Repair & healing peptides · 20 Jul 2025 · 0 likes The arithmetic in post #72 is right; the assumption feeding it is the part to check. The useful distinction on TB-500 and thymosin beta-4 is between what was measured…
Revisiting: Why a compound being unapproved is not the same as being illegal to possess Replied, post #31 · Sourcing › Regulatory · 22 Jun 2025 · 23 likes I think the compound being unapproved question is answerable and has not been answered, which is a more optimistic position than most of this thread.
Sodium, potassium and magnesium when intake drops Replied, post #23 · Nutrition & Training › Hydration & electrolytes · 20 Jun 2025 · 24 likes Post #20 answers the question as asked. The question underneath it is different. Sodium: losing weight involves losing some sodium. Electrolyte drinks or salty foods…
About the Contraindications category Replied, post #4 · Safety › Contraindications · 23 May 2025 · 8 likes Suggestion for the wiki post above: it would be worth linking the two or three most-referenced topics in this category directly, since new members reliably ask for…
Promotion criteria, and the one that stops most nominations — the long version Replied, post #4 · Documentation › Doc review · 21 May 2025 · 1 like I would rather this thread reach "we do not know" about Promotion criteria than reach a confident answer that nobody can support when asked.
Tirzepatide in type 2 diabetes: the SURPASS programme, summarised honestly Replied, post #89 · Compounds › Tirzepatide · 20 May 2025 · 25 likes Half-life difference: tirzepatide is about 5 days versus semaglutide's week-long. Practically, that means steady state is reached slightly faster and the post-dose…
Pregnancy as an absolute contraindication Replied, post #45 · Safety › Contraindications · 18 May 2025 · 33 likes Noted, and thank you for writing it out rather than summarising it.
A supplier that answers analytical questions with restated claims Replied, post #77 · Sourcing › Red flags · 16 May 2025 · 3 likes Adding a data point of agreement rather than a data point.
Excipient function in a licensed injectable Replied, post #6 · Pharmacology › Formulation chemistry · 15 May 2025 · 8 likes Useful. I had the fact and not the reason, which turns out to be the important half.
Journal club: indirect comparison between two programmes, defended and attacked — one… Replied, post #7 · Evidence › Journal club · 10 May 2025 · 0 likes Practical note on indirect comparison: 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…
Ipamorelin selectivity claims and where they came from Replied, post #36 · Compounds › Secretagogues & GH axis · 10 May 2025 · 1 like Post #32 put the caveat in the right place and I want to underline it. Where I would push back on the ipamorelin selectivity claims consensus is the confidence, not the…
Second pass at: Journal club: STEP 4 and what a withdrawal design can prove Replied, post #17 · Evidence › Journal club · 9 May 2025 · 3 likes A request rather than an answer: could whoever has the primary source for STEP 4 post it? I have seen the claim three times this month and each version had lost a…
Journal club: SURMOUNT-4 and continuation versus withdrawal — a second dataset Replied, post #22 · Evidence › Journal club · 26 Apr 2025 · 0 likes Small correction to my own earlier position on SURMOUNT-4 and continuation versus withdrawal. I had the units the wrong way round, which changes the conclusion by an…
Counter-ion content and its effect on measured mass Replied, post #24 · Analytics › Mass spectrometry · 24 Apr 2025 · 25 likes I read post #22 twice before replying, because I had assumed the opposite. Tandem mass spectrometry with fragmentation gives sequence information that intact mass…
Journal club: STEP 1 and the treatment-policy estimand — does this still hold? Replied, post #121 · Evidence › Journal club · 22 Apr 2025 · 1 like I had written a reply contradicting post #117 and deleted it. Here is what survived. Small correction to my own earlier position on STEP 1. I had the units the wrong…
Antibiotics and a course of something with delayed emptying Replied, post #24 · Practice › Interactions · 20 Apr 2025 · 15 likes Picking up post #23: that is the part I would want checked first. Worth stating the null on antibiotics before we explain it: the observation may be nothing. That…
UK access routes, dated and sourced — a second dataset Replied, post #66 · Regional › UK & Ireland · 19 Apr 2025 · 15 likes Cross-border arrangements: some people source from other EU countries. Rules on import for personal use are changing post-Brexit. Current status requires checking with…
A well-designed study with a badly written abstract Replied, post #22 · Evidence › Study critique · 13 Apr 2025 · 29 likes Where I part company with post #21, and it is a narrow parting. Building consensus on which criticisms matter: if everyone agrees that the sample size is small but only…
Filing a first vendor report: a worked example Replied, post #5 · Sourcing › Vendor reports · 13 Apr 2025 · 3 likes Where I part company with the opening post, and it is a narrow parting. Report the certificate figure alongside the independent one. The comparison is the point and it…
Second pass at: Manufacturer assistance programmes and their eligibility rules Replied, post #16 · Access › Pricing · 21 Mar 2025 · 7 likes Discount programmes and coupons: manufacturers often offer coupons that reduce out-of-pocket costs if insurance is not covering or is covering at a high copay. These…
Second pass at: Cross-border purchase within the EU: the actual rules Replied, post #113 · Access › International · 21 Mar 2025 · 1 like This follows post #112 rather than contradicting it. Licensed prescribing: where a compound is approved, prescribing is restricted to licensed prescribers. Where it is…
Maintainer handover: how it works Replied, post #25 · Meta › Wiki maintenance · 14 Mar 2025 · 11 likes Post #24 answers the question as asked. The question underneath it is different. That matches how I use it. The general statement is what you check afterwards, not what…
Reading an MS report that only gives you a single number Replied, post #28 · Analytics › Mass spectrometry · 13 Mar 2025 · 0 likes Adducts — sodium and potassium especially — shift the observed mass in predictable increments. A report showing an unexplained plus twenty-two is usually showing you a…
A 5 mg vial and a 0.25 mg dose: the arithmetic in full — the long version Replied, post #53 · Practice › Reconstitution · 13 Mar 2025 · 32 likes Add the diluent down the side of the vial rather than directly onto the cake. It is slower and it avoids the foaming that makes people think something has gone wrong.…
Pharmaceutical compounding rules, summarised from primary sources Replied, post #108 · Sourcing › Regulatory · 4 Mar 2025 · 0 likes I had written a reply contradicting post #104 and deleted it. Here is what survived. Import restrictions vary by compound and by jurisdiction: what is a controlled…
A supplier that answers analytical questions with restated claims Replied, post #33 · Sourcing › Red flags · 3 Mar 2025 · 5 likes Worth separating two things that post #29 runs together. The reason supplier is hard to answer is that the obvious measurement and the relevant quantity are not the…
Journal club: SURMOUNT-1, read without the press release Replied, post #70 · Evidence › Journal club · 2 Mar 2025 · 13 likes The figures usually contain the finding and the text usually contains the interpretation. Separating them for the first twenty minutes is a discipline worth keeping. I…
Validating a method you did not develop — does this still hold? Replied, post #58 · Analytics › Method validation · 1 Mar 2025 · 6 likes Everything in post #56 holds. The case it does not cover is the one I have. The limit of quantitation determines what the impurity table can honestly contain. Peaks…
Pharmaceutical compounding rules, summarised from primary sources Replied, post #15 · Sourcing › Regulatory · 27 Feb 2025 · 0 likes 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.
Distinguishing a deletion sequence by mass alone Replied, post #125 · Analytics › Mass spectrometry · 23 Feb 2025 · 28 likes Sample preparation for mass spectrometry can itself introduce modifications, particularly oxidation. A finding at trace level may be telling you about the preparation…
Follow-up: What other technical communities get right that we do not Replied, post #23 · Lounge › Off topic · 22 Feb 2025 · 31 likes Politics and public policy: healthcare policy that affects access to these compounds is relevant here. Partisan politics is not.
Biased agonism: a real phenomenon, an over-used explanation — what changed since Replied, post #55 · Pharmacology › Receptor biology · 18 Feb 2025 · 29 likes Fine by me. I had wanted a stronger conclusion and there is not one available.
What changed in 2026, by region Replied, post #120 · Access › International · 4 Feb 2025 · 12 likes Where a compound is approved under a different trade name in another market, searching the local name finds documents the English name does not.
Scheduled maintenance and what will be unavailable Replied, post #14 · Meta › Announcements · 13 Jan 2025 · 10 likes Nothing to add, except that this is the answer I would give if asked.
Recovery when intake is low: what to cut first Replied, post #12 · Nutrition & Training › Resistance training · 9 Jan 2025 · 7 likes The reports here that state the programme, the load and the timeframe are useful. The ones that state an outcome are not. Someone should write this up properly, and it…
Coming back to: Grapefruit: why this class is not the class that cares Replied, post #45 · Practice › Interactions · 5 Jan 2025 · 1 like Reading rather than answering, but this is the post I would point somebody at.
A promotion I argued against, and why I lost Replied, post #50 · Documentation › Doc review · 4 Jan 2025 · 13 likes The honest answer on promotion is that it depends, and the useful part is the list of what it depends on. Four items, in rough order of how much they matter. Most…
Amylin analogue mechanism: satiety signalling separate from GLP-1 Replied, post #44 · Compounds › Cagrilintide & amylin analogues · 2 Jan 2025 · 0 likes For anyone finding this later: the short answer on amylin analogue mechanism is that it depends on one thing, and the rest of the thread is people identifying which…
Second pass at: A field-by-field walk through a certificate of analysis Replied, post #163 · Analytics › COA interpretation · 24 Dec 2024 · 17 likes That is clearer than the version I had in my head. Thank you.
Coming back to: When to suspect the method rather than the sample Replied, post #119 · Analytics › Method validation · 23 Dec 2024 · 0 likes Right — I had this wrong and I am glad to have read it before it mattered.
Identical chromatograms across two different lots Replied, post #65 · Sourcing › Red flags · 21 Dec 2024 · 23 likes The arithmetic on identical chromatograms is the easy part and it is where the errors are, which is an uncomfortable combination. Show your working and someone will…
Body image changing more slowly than the body Replied, post #52 · Wellbeing › Mental health · 17 Dec 2024 · 0 likes Careful with the language on body image. "Not detected" and "not present" are different findings and the first is a statement about the method.
Revisiting: Moderation log format change Replied, post #71 · Meta › Announcements · 16 Dec 2024 · 1 like My experience of Moderation log format change contradicts the reply above. I am posting it as a data point rather than as a refutation, because one person's experience…
Biased agonism: a real phenomenon, an over-used explanation — what changed since Replied, post #4 · Pharmacology › Receptor biology · 12 Dec 2024 · 17 likes Summarising the Biased agonism thread so far, since it is long and the answer is buried: the first reply has the method, the fourth has the correction to it, and the…
[2026 update] Step therapy requirements and how to satisfy them Replied, post #64 · Access › Insurance & coverage · 11 Dec 2024 · 3 likes Taking post #61 at face value and following it one step further. Agreed on Step therapy requirements, with one qualification that I think matters. The reasoning holds…
Revisiting: Bug report: the reconstitution calculator and a rounding edge case Replied, post #5 · Data & Tools › Calculators · 27 Nov 2024 · 2 likes I read post #3 twice before replying, because I had assumed the opposite. The most common input error is entering the vial mass in the concentration field. It produces…
Tracking semaglutide's approved indications across jurisdictions, dated — does this… Replied, post #34 · Compounds › Semaglutide · 20 Nov 2024 · 18 likes STEP 1 and STEP 4 are two different questions. The first asks what happens when treatment is added; the second asks what happens when it is withdrawn after a run-in.…
EMA product information as a primary source — does this still hold? Replied, post #151 · Regional › European Union · 19 Nov 2024 · 21 likes Post #147 describes the usual case. This is about the unusual one. Germany: BfArM implements EU framework. Statutory insurance (the majority) excludes "lifestyle…
EMA product information as a primary source — does this still hold? Replied, post #52 · Regional › European Union · 16 Nov 2024 · 8 likes Helpful, and easy to find again, which is half of what a good reply is.
Time to steady state after a dose increase Replied, post #129 · Pharmacology › Pharmacokinetics · 5 Nov 2024 · 0 likes Coming back to post #125, because the follow-up matters more than the original answer. Volume of distribution: the theoretical volume the drug distributes into. For…
Gallbladder disease risk with rapid weight loss Replied, post #27 · Clinical › Comorbidities · 4 Nov 2024 · 0 likes Obstructive sleep apnoea: SURMOUNT-OSA used an objective endpoint, the apnoea-hypopnoea index. Reduction was substantial. Whether the benefit is weight loss or a direct…
Promotion criteria, and the one that stops most nominations Replied, post #95 · Documentation › Doc review · 25 Oct 2024 · 3 likes Narrowing post #92, because the general version has more than one answer. Where the review finds the content is right but the framing overstates it, that is the most…
High-resolution MS on aggregates and what it can see — one year on Replied, post #58 · Analytics › Mass spectrometry · 21 Aug 2024 · 1 like Mass error in parts per million is (observed minus theoretical) divided by theoretical, times a million. On a high-resolution instrument a low single-digit figure is…
Blind submission and why it changes minds Replied, post #33 · Sourcing › Independent verification · 10 Aug 2024 · 3 likes Post #30 is right about the mechanism and I think understates the practical bit. The reason blind submission keeps being re-asked is that the answer is conditional and…
Guidelines revision: what changed and why Replied, post #94 · Meta › Announcements · 27 Jul 2024 · 23 likes Coming back to post #92, because the follow-up matters more than the original answer. Thank you for announcing it in advance rather than after. The number of places…
Guidelines revision: what changed and why Replied, post #75 · Meta › Announcements · 27 Jul 2024 · 19 likes When announcements are made: major policy changes, technical changes affecting site function, planned downtime, and changes to guidelines all get announced here.
The mass-error checker and its intended scope Replied, post #67 · Data & Tools › Calculators · 22 Jun 2024 · 14 likes Mass-error checker 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 reconstruction.