j.habermann

TL3 Regular · Ljubljana, SI

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

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

140 posts, newest first. Showing up to 150.

Priming a pen and whether the primed volume is wasted Replied, post #24 · Devices › Pens & autoinjectors · 26 Jul 2026 · 23 likes Comparing cost per milligram between a pen and a vial ignores wastage, dead volume and the number of doses actually obtainable. Cost per delivered dose at your dose is…
A revision dispute resolved on the topic rather than in the history Replied, post #15 · Meta › Wiki maintenance · 22 Jul 2026 · 0 likes Flagging a stale cross-reference. This page links to a topic that was later promoted into its own document, so the link now goes to the discussion rather than the…
Which categories are strict and which are relaxed, honestly Replied, post #39 · Start Here › Welcome · 22 Jul 2026 · 29 likes The Lounge is a real category rather than a dumping ground. The sourcing rule still applies there, which surprises people, but the register is looser and nobody minds a…
Stepping down deliberately, and how to do it without losing progress — what changed since Replied, post #87 · Practice › Dosing & titration · 22 Jul 2026 · 2 likes Steady state means the plasma concentration is stable from dose to dose. That happens around 4 to 5 half-lives. Before that, the concentration is rising with each dose.…
HbA1c lag and what it can and cannot tell you at eight weeks — one year on Replied, post #21 · Clinical › Bloodwork · 21 Jul 2026 · 2 likes Picking up post #20: that is the part I would want checked first. Adding a small correction to the HbA1c lag summary above rather than a disagreement with it. The…
0.3 mL versus 0.5 mL versus 1 mL barrels: resolution matters Replied, post #113 · Devices › Syringes & needles · 20 Jul 2026 · 0 likes U-100 means the barrel is graduated for a solution containing one hundred units of insulin per millilitre. For anything that is not insulin, the units are simply…
How shortages have affected compounding permissions Replied, post #48 · Access › Shortages · 18 Jul 2026 · 21 likes Whatever the answer on shortages turns out to be, the method for getting there is the same: state the assumption, do the arithmetic in public, invite the correction.
Journal club: what we got wrong in an earlier session Replied, post #91 · Evidence › Journal club · 17 Jul 2026 · 13 likes Where the group cannot agree, record the disagreement rather than resolving it by seniority. The recorded disagreement is more honest and more useful later. This has…
What consumer-accessible tests can and cannot determine — a second dataset Replied, post #92 · Analytics › Home & field testing · 16 Jul 2026 · 15 likes Post #89 describes the usual case. This is about the unusual one. Colorimetric tests: colour intensity correlates with concentration, but the relationship is non-linear…
Tracking a shortage from primary sources rather than rumour Replied, post #98 · Access › Shortages · 12 Jul 2026 · 0 likes Post #94 and I disagree about the size of the effect, not about the direction. Stockpiling in response to a shortage worsens it, which is true and is a poor argument to…
What consumer-accessible tests can and cannot determine — a second dataset Replied, post #77 · Analytics › Home & field testing · 12 Jul 2026 · 12 likes Ultraviolet absorbance at 280 nanometres estimates concentration for peptides containing aromatic residues and gives nothing for peptides that do not. Knowing which…
[2026 update] Antibiotics and a course of something with delayed emptying Replied, post #19 · Practice › Interactions · 7 Jul 2026 · 2 likes On post #16 — agreed on the reasoning, with one qualification. Where a published interaction study exists it usually reports an area-under-curve ratio, and that number…
Journal club: SUSTAIN 6 and its retinopathy signal Replied, post #24 · Evidence › Journal club · 5 Jul 2026 · 0 likes Where I part company with post #22, and it is a narrow parting. SUSTAIN 6 sits at the boundary between what this community can usefully discuss and what it cannot, and…
Why the absence of controlled human data on BPC-157 matters more than people admit Replied, post #52 · Compounds › Repair & healing peptides · 2 Jul 2026 · 18 likes Before the thread moves on from absence of controlled human data — what is the sample size behind the claim? I am not being difficult; I have seen the same figure…
Carryover and the ghost peak from last week's standard — what changed since Replied, post #90 · Analytics › HPLC & UHPLC · 30 Jun 2026 · 23 likes Careful with the language on Carryover. "Not detected" and "not present" are different findings and the first is a statement about the method.
I have no scientific background — can I still follow the analytics categories? Replied, post #24 · Start Here › Welcome · 21 Jun 2026 · 12 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…
Trust level 3 requirements: a clarification — does this still hold? Replied, post #64 · Meta › Announcements · 14 Jun 2026 · 0 likes Trust level 3 requirements: I would want to see the raw numbers rather than the summary before agreeing. Summaries lose exactly the information that would settle this.
Secretagogues and glucose tolerance: the mechanistic concern Replied, post #34 · Compounds › Secretagogues & GH axis · 13 Jun 2026 · 7 likes This follows post #33 rather than contradicting it. A definition problem is doing most of the work in this secretagogues and glucose tolerance discussion. Once the term…
Packaging that arrived damaged: documenting it properly Replied, post #23 · Sourcing › Logistics · 11 Jun 2026 · 14 likes Peak periods and public holidays affect this more than any other factor and are entirely predictable in advance.
Reading a trial's population section before its results Replied, post #97 · Evidence › Trials · 7 Jun 2026 · 0 likes Multiplicity and multiple comparisons: if a trial tests many hypotheses, the chance of a false positive on at least one by random chance increases. This is why…
Packaging that arrived damaged: documenting it properly Replied, post #16 · Sourcing › Logistics · 28 May 2026 · 2 likes Peak periods and public holidays affect this more than any other factor and are entirely predictable in advance. The part I am sure of is shorter than the part I have…
[2026 update] Are there stupid questions here? A staff answer, at length Replied, post #36 · Start Here › Welcome · 21 May 2026 · 6 likes Do not feel obliged to reply to every reply on your own topic. A single "that answered it" and a marked solution is the most useful thing you can do for the next person…
The arithmetic of an intermediate dose between two label steps Replied, post #2 · Practice › Dosing & titration · 21 May 2026 · 21 likes The maximum studied dose is a fact about the trial and not a ceiling on the molecule. It is also the last point at which anything is known, which is the reason to treat…
The anatomy of a question that gets answered within an hour Replied, post #49 · Start Here › How to Ask · 18 May 2026 · 0 likes Post #45 describes the usual case. This is about the unusual one. A photograph of a vial is rarely useful and a photograph of a document usually is. Redact the…
Revisiting: Liver enzymes drifting down and what that usually means Replied, post #31 · Clinical › Bloodwork · 11 May 2026 · 22 likes The version of Liver enzymes drifting that circulates here is a simplification of a simplification. It is not wrong, but it has lost the conditions under which it…
Why the timeline is on the right and not the left — what changed since Replied, post #33 · Meta › Site feedback · 9 May 2026 · 16 likes On timeline: the maintained page in the documentation commons covers the general case with citations and a review date, which is more reliable than any reply here…
A 5 mg vial and a 0.25 mg dose: the arithmetic in full Replied, post #38 · Practice › Reconstitution · 7 May 2026 · 0 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.
Converting between mg/mL and units per dose, both directions — the long version Replied, post #110 · Practice › Reconstitution · 25 Apr 2026 · 15 likes On post #106 — agreed on the reasoning, with one qualification. Do not shake. Swirl, or leave it. Vigorous agitation introduces air and shear, and neither helps a…
Why the absence of controlled human data on BPC-157 matters more than people admit Replied, post #16 · Compounds › Repair & healing peptides · 25 Apr 2026 · 23 likes Taking absence of controlled human data seriously for a moment rather than deflecting: the honest position is that the community has observations and no controlled…
A widely repeated interaction claim that turns out to be unsupported — what changed since Replied, post #28 · Practice › Interactions · 18 Apr 2026 · 9 likes Post #25 answers the question as asked. The question underneath it is different. Alcohol is not contraindicated in the labelling and it does irritate a stomach that is…
Follow-up: Lyophilisation and why the cake looks the way it does Replied, post #14 · Pharmacology › Formulation chemistry · 16 Apr 2026 · 15 likes Buffer choice affects both solubility and stability, and the two do not always point the same way. A formulation is a compromise between them rather than an optimum for…
Subgroup analyses: pre-specified versus discovered Started this topic · Evidence › Trials · 16 Apr 2026 · 0 likes Subgroup analyses: pre-specified versus discovered — setting out what I have, and where I think it stops being reliable. I would like to disagree carefully with the…
Completing a dose with a second syringe, and the dead-volume arithmetic Replied, post #19 · Practice › Administration · 25 Mar 2026 · 31 likes Leak-back after withdrawal: a small amount of liquid on the skin after withdrawal is ordinary. Whether you lost a "meaningful" dose depends on concentration and your…
Research-use-only status: what it means legally and practically Replied, post #17 · Compounds › Other compounds · 21 Mar 2026 · 25 likes This follows post #16 rather than contradicting it. A compound with no established assay is a compound where a certificate can say almost anything. That is not an…
Grapefruit: why this class is not the class that cares Replied, post #54 · Practice › Interactions · 18 Mar 2026 · 6 likes Two things can be true about grapefruit at once: the mechanism is plausible and the evidence for the size of the effect is thin. Most of the argument here is people…
Introducing myself: pharmacist, sceptic, reluctant participant — one year on Replied, post #12 · Lounge › Introductions · 8 Mar 2026 · 3 likes Nice to meet you. Say what you are interested in rather than what you do, if you would rather — plenty of people here are anonymous about their background and it costs…
Adolescents: a distinct evidence base — one year on Replied, post #70 · Clinical › Special populations · 2 Mar 2026 · 0 likes Second this, and I would have said it less carefully.
Dead volume across syringe and needle combinations Replied, post #79 · Devices › Syringes & needles · 27 Feb 2026 · 4 likes U-100 means the barrel is graduated for a solution containing one hundred units of insulin per millilitre. For anything that is not insulin, the units are simply…
MHRA statements, read directly Replied, post #94 · Regional › UK & Ireland · 22 Feb 2026 · 14 likes I had written a reply contradicting post #92 and deleted it. Here is what survived. Practical note on MHRA statements: write down what you expect before you look. The…
Follow-up: Bug report: the reconstitution calculator and a rounding edge case Replied, post #49 · Data & Tools › Calculators · 16 Feb 2026 · 18 likes Why calculators are not medical advice: they do arithmetic. Medical decisions are not arithmetic. A calculator that says a certain dose is "compatible with" a certain…
Anaesthesia and elective surgery: the aspiration question Replied, post #23 · Practice › Interactions · 15 Feb 2026 · 14 likes Post #22 is right about the mechanism and I think understates the practical bit. Having read the whole anaesthesia and elective surgery thread before replying: the…
Waist circumference technique and its repeatability Replied, post #51 · Outcomes › Progress reports · 14 Feb 2026 · 1 like Waist circumference technique was covered in the wiki last year and the page has a review date on it, which is a better starting point than my memory of a thread.
Trifluoroacetate content and its consequences Replied, post #95 · Analytics › Impurities & related substances · 6 Feb 2026 · 14 likes Narrowing post #92, because the general version has more than one answer. The honest reading of a purity figure: it is an upper bound on how much of what the method…
Why semaglutide solutions can look faintly opalescent and when that matters Replied, post #57 · Compounds › Semaglutide · 18 Jan 2026 · 0 likes Reporting rather than recommending, on semaglutide solutions. What happened is above. Whether it should have is a different question and not one I am qualified to answer.
Muscle cramps: the ordinary causes before the exotic ones Replied, post #12 · Practice › Side effects · 13 Jan 2026 · 8 likes The relationship between symptom burden and outcome is not what people assume. Feeling worse is not evidence of a larger effect and feeling nothing is not evidence of…
Amylin receptor signalling and satiety — what changed since Replied, post #14 · Pharmacology › Receptor biology · 9 Jan 2026 · 13 likes This follows post #11 rather than contradicting it. The area postrema sits outside the blood-brain barrier and is where a great deal of the nausea signalling in this…
Revisiting: Journal club: SURMOUNT-1, read without the press release Replied, post #8 · marked as the solution · Evidence › Journal club · 9 Jan 2026 · 8 likes Where I part company with post #4, and it is a narrow parting. Agreed on SURMOUNT-1, with one qualification that I think matters. The reasoning holds for the case as…
Distinguishing expected GI effects from something that needs urgent attention Replied, post #3 · Practice › Side effects · 30 Dec 2025 · 4 likes This is the first time the answer has come with its own limits attached. Appreciated.
Heterogeneity as information rather than as a nuisance Replied, post #40 · Evidence › Meta-analyses · 27 Dec 2025 · 24 likes I think the heterogeneity question is answerable and has not been answered, which is a more optimistic position than most of this thread.
Preprint servers and what screening they do Replied, post #9 · Evidence › Preprints · 27 Dec 2025 · 24 likes Server repositories: medRxiv for medicine, bioRxiv for biology. Preprints on these servers are time-stamped and have DOIs even if they are later published elsewhere.…
Amylin analogue mechanism: satiety signalling separate from GLP-1 — does this still hold? Replied, post #15 · Compounds › Cagrilintide & amylin analogues · 24 Dec 2025 · 9 likes Where the Amylin analogue mechanism reasoning breaks down for me is the step from the group result to the individual case. That step is almost never argued for.
Semaglutide half-life: where the 165 to 184 hour figure comes from Replied, post #74 · Compounds › Semaglutide · 21 Dec 2025 · 0 likes Post #72 describes the usual case. This is about the unusual one. The opalescent appearance in semaglutide solutions is occasionally noted and the mechanism is unclear.…
Injection discomfort: needle gauge, volume, temperature, technique Replied, post #6 · Practice › Administration · 17 Dec 2025 · 6 likes Adding the measurement that post #3 says would settle it. Needle length matters less than angle for subcutaneous delivery in most people. A short needle at ninety…
Follow-up: A supplier that answers analytical questions with restated claims Replied, post #10 · Sourcing › Red flags · 9 Dec 2025 · 30 likes Keep the two claims separate. "The result on this lot did not match the certificate" is a report that can be checked. "This supplier is dishonest" is an allegation…
Warfarin and altered intake: the monitoring argument — the long version Replied, post #64 · Practice › Interactions · 7 Dec 2025 · 26 likes My position on Warfarin and altered intake is current rather than settled. I have revised it once already and I expect to again, so treat it accordingly.
Tracking a preprint to publication: a worked example Replied, post #60 · Evidence › Preprints · 6 Dec 2025 · 7 likes Say it is a preprint in the first line rather than the last. Everything downstream depends on that status and readers arriving from search will not scroll for it.
Prescription requirements and telehealth models Replied, post #49 · Sourcing › Regulatory · 5 Dec 2025 · 18 likes I had written a reply contradicting post #48 and deleted it. Here is what survived. I would rather this thread reach "we do not know" about prescription requirements…
Tirzepatide in type 2 diabetes: the SURPASS programme, summarised honestly — the long… Replied, post #18 · Compounds › Tirzepatide · 2 Dec 2025 · 3 likes Confirming post #15 from a second method, which matters more than confirming it from a second person. One caution on Tirzepatide in type 2 diabetes: everything above…
Reading SURMOUNT-1 without the press release Replied, post #70 · Compounds › Tirzepatide · 18 Nov 2025 · 21 likes Weight reduction figures from SURMOUNT-1 are frequently quoted without the trial's duration attached. A mean change at 72 weeks and a mean change at 40 weeks are…
Oral semaglutide bioavailability and its variability between people Replied, post #15 · Compounds › Oral incretins · 15 Nov 2025 · 21 likes Timing consistency matters more for oral dosing than for weekly injection, because absorption depends on the state of the stomach and the state of the stomach varies…
Thyroid function tests during substantial weight change Replied, post #133 · Clinical › Bloodwork · 13 Nov 2025 · 0 likes Narrowing post #130, because the general version has more than one answer. Time of day: some biomarkers vary across the day. Cortisol in the morning differs from…
Semaglutide half-life: where the 165 to 184 hour figure comes from Replied, post #41 · Compounds › Semaglutide · 6 Nov 2025 · 1 like On alcohol: the labelling does not contraindicate it, but it raises gastric irritation risk and semaglutide already does that. There is no published interaction study…
Semaglutide and gastric emptying — the mechanism behind most of the side-effect profile… Replied, post #7 · Compounds › Semaglutide · 2 Nov 2025 · 12 likes Gastric emptying delay is the mechanism behind most of the gastrointestinal side effects. Slowing the stomach empties it feeds less food into the intestines at a time,…
What happens after your first post: likes, trust levels, and why none of it matters much… Replied, post #8 · Start Here › Welcome · 12 Oct 2025 · 3 likes The Lounge is a real category rather than a dumping ground. The sourcing rule still applies there, which surprises people, but the register is looser and nobody minds a…
Thyroid function tests during substantial weight change Replied, post #89 · Clinical › Bloodwork · 9 Oct 2025 · 26 likes Thyroid function tests during substantial has a well-known answer and a correct answer, and the interesting work is establishing that they are the same. Nobody has done…
Follow-up: Why "dose equivalence" between different incretin analogues is a weak concept Replied, post #9 · Practice › Dosing & titration · 7 Oct 2025 · 13 likes The arithmetic in post #6 is right; the assumption feeding it is the part to check. The starting dose in most of these programmes is a tolerance step and produces…
Airline travel with a temperature-sensitive injectable — what changed since Replied, post #85 · Devices › Cold chain · 4 Oct 2025 · 12 likes Careful with the language on Airline travel. "Not detected" and "not present" are different findings and the first is a statement about the method.
Payment method and the leverage it gives you, ranked Replied, post #41 · Sourcing › Payments · 20 Sep 2025 · 0 likes Confirming post #40 from a second method, which matters more than confirming it from a second person. The practical questions in this subcategory are about recourse,…
Which panel is worth repeating and which is worth ignoring Replied, post #114 · Clinical › Bloodwork · 18 Sep 2025 · 19 likes The thing about panel that took me longest to accept is that a plausible mechanism is not evidence of an effect. It is a reason to look, not a result.
What a purity-only report leaves out Replied, post #16 · Sourcing › Independent verification · 16 Sep 2025 · 0 likes A record with four results over sixteen months is a thin record rather than a bad one, and the honest description says which. The general answer and the answer for your…
Second pass at: Programming during a large energy deficit Replied, post #7 · Nutrition & Training › Resistance training · 13 Sep 2025 · 4 likes Seconded. It reads as careful rather than confident, which is the right register.
Aggregated purity results across four services, with caveats — a second dataset Replied, post #84 · Data & Tools › Datasets · 9 Sep 2025 · 7 likes Publishing the raw records alongside the summary is what makes a dataset checkable. A summary alone asks for trust that nobody has earned.
Aggregated purity results across four services, with caveats — a second dataset Replied, post #61 · Data & Tools › Datasets · 8 Sep 2025 · 1 like I would keep Aggregated purity results across four and the decision it usually gets used for separate in this thread. They are related and they are not the same…
Follow-up: Journal club: orforglipron phase 2 and the non-peptide question Replied, post #65 · Evidence › Journal club · 1 Sep 2025 · 21 likes TRIUMPH (ongoing): Retatrutide phase 3. No results yet. Nothing should be attributed to it because it has not finished. When it does, this discussion will return to it.
[2026 update] Does dual agonism explain the effect size, or is it dose? Replied, post #9 · Compounds › Tirzepatide · 30 Aug 2025 · 0 likes Building on post #6 rather than restating it. Research-use-only tirzepatide is not approved for human use and is not made to pharmaceutical standards. Anyone discussing…
Why catalogue breadth is not evidence of anything — what changed since Replied, post #29 · Compounds › Other compounds · 27 Aug 2025 · 31 likes Anything sold as a blend is two analytical problems and usually one number. A single purity figure for a two-component preparation does not tell you the ratio, and the…
Tirzepatide molecular mass and the charge states you would expect on ESI Replied, post #13 · Compounds › Tirzepatide · 25 Aug 2025 · 15 likes Categorical response thresholds — the proportion reaching ten, fifteen or twenty per cent reduction — are more persuasive and less informative than the mean. They…
Are there stupid questions here? A staff answer, at length Replied, post #109 · Start Here › Welcome · 24 Aug 2025 · 4 likes Nothing to add on the substance. Thank you for taking the question at face value.
[2026 update] What the GIP component of tirzepatide is thought to contribute, and how… Replied, post #111 · Compounds › Tirzepatide · 23 Aug 2025 · 15 likes Everything in post #107 holds. The case it does not cover is the one I have. The honest answer on GIP component of tirzepatide is that it depends, and the useful part…
[2026 update] Journal club: is percentage weight change the right endpoint? Replied, post #38 · Evidence › Journal club · 15 Aug 2025 · 18 likes SURMOUNT-OSA (N Engl J Med 2024): Tirzepatide in obstructive sleep apnoea, using an objective physiological endpoint. Notable because soft endpoints are avoided. Two…
Revisiting: Why a compound being unapproved is not the same as being illegal to possess Replied, post #73 · Sourcing › Regulatory · 8 Aug 2025 · 4 likes Adding a reference point for compound being unapproved. Mine is a single case, collected without controls, and I am posting the method alongside it so it can be…
When a preprint is the best available evidence and we say so Replied, post #24 · Evidence › Preprints · 4 Aug 2025 · 2 likes Source for the preprint figure, since it was asked for. It is in the discussion rather than the abstract, which is why the version circulating is stronger than the…
"Greater than or equal to 99%" as a specification rather than a result Replied, post #14 · Analytics › COA interpretation · 1 Aug 2025 · 0 likes An itemised related-substances table with retention times says considerably more about the synthesis than a single total. A total tells you how much is not the main…
A ten-fold dose error caught before injection — one year on Replied, post #7 · Devices › Syringes & needles · 31 Jul 2025 · 26 likes Small correction to my own earlier position on ten-fold dose error caught. I had the units the wrong way round, which changes the conclusion by an order of magnitude…
Follow-up: The decimal-point error, and the habit that catches it Replied, post #33 · Practice › Reconstitution · 29 Jul 2025 · 8 likes The version of decimal-point error that circulates here is a simplification of a simplification. It is not wrong, but it has lost the conditions under which it holds,…
Cagrilintide molecular characteristics and analytical considerations Replied, post #5 · Compounds › Cagrilintide & amylin analogues · 24 Jul 2025 · 31 likes The dosing interval: cagrilintide's half-life is roughly 7 to 8 days, suitable for weekly dosing. The pharmacokinetics are the reason the dosing schedule makes sense.…
Coming back to: Amylin analogue mechanism: satiety signalling separate from GLP-1 Replied, post #26 · Compounds › Cagrilintide & amylin analogues · 21 Jul 2025 · 1 like Adding a null result on Amylin analogue mechanism. I looked, carefully, and found nothing, and null results deserve posting precisely because they never are.
An emergency department visit, described afterwards Replied, post #44 · Safety › Adverse events · 20 Jul 2025 · 17 likes Reading rather than contributing, but this is the most useful thread I have found on it.
TB-500 and thymosin beta-4: the fragment versus the protein Replied, post #73 · Compounds › Repair & healing peptides · 18 Jul 2025 · 19 likes Confirming post #72 from a second method, which matters more than confirming it from a second person. I disagree with the framing of TB-500 and thymosin beta-4 above,…
Coming back to: Why quantitation is the hard part, not detection Replied, post #39 · Analytics › Home & field testing · 17 Jul 2025 · 2 likes Reading back through, this was answered upthread and I missed it. My fault.
Coming back to: Nausea profile of amylin analogues compared with GLP-1 agonists Replied, post #53 · Compounds › Cagrilintide & amylin analogues · 11 Jul 2025 · 9 likes Post #50 describes the usual case. This is about the unusual one. Comparing an amylin analogue to an incretin agonist on weight change alone misses that they were…
Follow-up: Why the titration planner refuses to produce a schedule below a floor Replied, post #40 · Data & Tools › Calculators · 2 Jul 2025 · 21 likes I read post #36 twice before replying, because I had assumed the opposite. Rounding behaviour is where two tools disagree. One rounding to the nearest graduation and…
Second pass at: Reading a combination trial: attributing effect to components Replied, post #35 · Compounds › Cagrilintide & amylin analogues · 1 Jul 2025 · 1 like Taking post #34 at face value and following it one step further. The CagriSema phase 2 paper: a fixed combination of the two components in one weekly injection. The…
Repeatability versus intermediate precision Replied, post #103 · Analytics › Method validation · 30 Jun 2025 · 13 likes Limits of detection and quantitation: LOD is the lowest concentration that produces a signal above background. LOQ is the lowest concentration at which the method meets…
Journal club: the CagriSema phase 2 combination paper — a second dataset Replied, post #35 · Evidence › Journal club · 11 Jun 2025 · 3 likes On CagriSema phase 2 combination paper, 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.
[2026 update] An appeal that failed, and what I would do differently Replied, post #62 · Access › Insurance & coverage · 11 Jun 2025 · 0 likes Answering the appeal question as asked, then the question I think is meant. As asked: yes, with the qualification below. As meant: it depends on how the first…
Pre-registering a personal experiment, seriously Replied, post #89 · Research Methods › N-of-1 designs · 2 Jun 2025 · 7 likes Understood. Thank you for being specific about the limits of it.
Pregnancy as an absolute contraindication Replied, post #47 · Safety › Contraindications · 18 May 2025 · 7 likes On post #46 — agreed on the reasoning, with one qualification. Personal or family history of medullary thyroid carcinoma, or multiple endocrine neoplasia type 2, is the…
Ipamorelin selectivity claims and where they came from Replied, post #38 · Compounds › Secretagogues & GH axis · 16 May 2025 · 24 likes An honest declaration on ipamorelin selectivity claims: I have a prior here and it is strong enough that you should weight what I say downward. Stating it rather than…
Promotion criteria, and the one that stops most nominations — the long version Replied, post #2 · Documentation › Doc review · 13 May 2025 · 24 likes The opening post put the caveat in the right place and I want to underline it. Second maintainers matter. A single maintainer is a single point of failure and every…
A supplier that answers analytical questions with restated claims Replied, post #75 · Sourcing › Red flags · 12 May 2025 · 24 likes Safety documentation absent: a supplier that cannot provide information about sterility testing, endotoxin testing, or safety documentation when asked is raising flags.…
Dizziness on standing: the ordinary explanation first Replied, post #12 · Nutrition & Training › Hydration & electrolytes · 25 Apr 2025 · 0 likes The most useful posts here describe what was measured, what was changed, and what happened, in that order. Caveat: everything above assumes the paperwork is what it…
How Janoshik, Medutest, PeptideMeter and VendorInvestigate differ Replied, post #3 · Sourcing › Independent verification · 21 Apr 2025 · 4 likes Repeat determination on the same product line months apart is the measurement that speaks to consistency, and consistency is what most buyers actually want. Anyone who…
Journal club: STEP 1 and the treatment-policy estimand — does this still hold? Replied, post #84 · Evidence › Journal club · 21 Apr 2025 · 19 likes Worth separating two things that post #80 runs together. My position on STEP 1 is current rather than settled. I have revised it once already and I expect to again, so…
Follow-up: What other technical communities get right that we do not Replied, post #72 · Lounge › Off topic · 19 Apr 2025 · 26 likes Analytics first, in my case, and I still find the practice category the harder read. Chromatography has one right answer more often than logistics does.
Validating a calculator against hand arithmetic — what changed since Replied, post #21 · Data & Tools › Calculators · 17 Apr 2025 · 24 likes Dose equivalence calculator: compounds have different potencies. The calculator is provided with a caveat: "equivalence" is not precise and individual response varies.…
Antibiotics and a course of something with delayed emptying Replied, post #22 · Practice › Interactions · 17 Apr 2025 · 1 like The arithmetic on antibiotics is the easy part and it is where the errors are, which is an uncomfortable combination. Show your working and someone will catch it.
Requesting a page: what makes a good request Replied, post #44 · Documentation › Wiki requests · 3 Apr 2025 · 22 likes If a request is declined, the reasoning is written down, and it is worth reading because it usually describes a better version of the same idea. I would be interested…
Why cagrilintide alone is discussed so much less than in combination Replied, post #66 · Compounds › Cagrilintide & amylin analogues · 30 Mar 2025 · 0 likes For anyone arriving from searches on "amylin agonist": this subcategory discusses published clinical evidence and what it does and does not establish. It does not…
Checking someone else's arithmetic: a worked example thread Replied, post #33 · Practice › Reconstitution · 27 Mar 2025 · 30 likes Preservative effectiveness is tested against a defined microbial challenge under defined conditions. It is not a licence to treat an entered vial as sterile…
Pregnancy as an absolute contraindication — the long version Replied, post #2 · Safety › Contraindications · 24 Mar 2025 · 18 likes Same experience here, different supplier, so it is at least not unique to one of them.
Second pass at: Cross-border purchase within the EU: the actual rules Replied, post #111 · Access › International · 20 Mar 2025 · 21 likes I have three months of notes on Cross-border purchase within and the honest summary is that the trend is real and the week-to-week numbers are noise. I nearly drew the…
A 5 mg vial and a 0.25 mg dose: the arithmetic in full — the long version Replied, post #55 · Practice › Reconstitution · 16 Mar 2025 · 3 likes On post #51 — agreed on the reasoning, with one qualification. Reconstituting the whole vial when you will use a quarter of it is a decision to store the rest in…
One lot is one lot: when a report becomes a pattern — the long version Replied, post #34 · Sourcing › Vendor reports · 16 Mar 2025 · 2 likes Reports of ordinary results are more valuable than reports of remarkable ones, precisely because only the remarkable ones get posted elsewhere.
Maintainer handover: how it works Replied, post #27 · Meta › Wiki maintenance · 14 Mar 2025 · 0 likes The version of maintainer handover that circulates here is a simplification of a simplification. It is not wrong, but it has lost the conditions under which it holds,…
Talking to a therapist about this specifically — does this still hold? Replied, post #29 · Wellbeing › Mental health · 13 Mar 2025 · 33 likes Support and community: some people process weight change through community (online or in-person). Others prefer privacy. Knowing what you need and seeking it…
Reading an MS report that only gives you a single number Replied, post #22 · Analytics › Mass spectrometry · 5 Mar 2025 · 21 likes Coming back to post #18, because the follow-up matters more than the original answer. Electrospray on a peptide of this size gives a multiply charged series rather than…
Pharmaceutical compounding rules, summarised from primary sources Replied, post #106 · Sourcing › Regulatory · 4 Mar 2025 · 13 likes Generic or biosimilar entry depends on patent and exclusivity positions that are jurisdiction-specific and are frequently misreported.
Validating a method you did not develop — does this still hold? Replied, post #52 · Analytics › Method validation · 27 Feb 2025 · 24 likes That reframing is the whole thing. The facts I already had.
Follow-up: What other technical communities get right that we do not Replied, post #25 · Lounge › Off topic · 25 Feb 2025 · 1 like Community norms: if you want to discuss how the community should work (not moderation decisions, which go in Meta) the Lounge is a place for that casual discussion.
Revisiting: Bug report: the reconstitution calculator and a rounding edge case Replied, post #98 · Data & Tools › Calculators · 20 Feb 2025 · 0 likes Post #94 put the caveat in the right place and I want to underline it. Significant figures in the output should not exceed what the inputs support. A concentration…
When to suspect the method rather than the sample Replied, post #80 · Analytics › Method validation · 11 Feb 2025 · 2 likes Adding the measurement that post #79 says would settle it. Forced degradation studies: deliberately stress the material with acid, base, oxidant, heat, light to…
SURPASS-2 and the comparator dose question that will not go away Replied, post #109 · Compounds › Tirzepatide · 19 Jan 2025 · 29 likes SURMOUNT-4's randomised withdrawal design is the strongest available evidence about what happens on stopping. It says nothing about a lower maintenance dose, because…
Recovery when intake is low: what to cut first Replied, post #14 · Nutrition & Training › Resistance training · 10 Jan 2025 · 0 likes Post #12 put the caveat in the right place and I want to underline it. Machine-based work is often better tolerated when energy is low and is not inferior for this…
Amylin analogue mechanism: satiety signalling separate from GLP-1 Replied, post #46 · Compounds › Cagrilintide & amylin analogues · 6 Jan 2025 · 6 likes Adding the measurement that post #45 says would settle it. Two things can be true about amylin analogue mechanism at once: the mechanism is plausible and the evidence…
Identical chromatograms across two different lots Replied, post #67 · Sourcing › Red flags · 25 Dec 2024 · 3 likes Worth separating two things that post #66 runs together. If you are new and reading this thread for the answer to identical chromatograms: the answer is conditional,…
Second pass at: A field-by-field walk through a certificate of analysis Replied, post #161 · Analytics › COA interpretation · 22 Dec 2024 · 0 likes Adding the measurement that post #159 says would settle it. The reason field-by-field walk through a certificate keeps being re-asked is that the answer is conditional…
Biased agonism: a real phenomenon, an over-used explanation — what changed since Replied, post #2 · Pharmacology › Receptor biology · 8 Dec 2024 · 0 likes Confirming the opening post from a second method, which matters more than confirming it from a second person. Since Biased agonism keeps coming up, it should probably…
Washout with a one-week half-life: the arithmetic Replied, post #87 · Research Methods › N-of-1 designs · 8 Dec 2024 · 11 likes Genuine question rather than a rhetorical one: has anyone here actually observed washout, as opposed to read about it? The thread is long and I cannot tell.
Gallbladder disease risk with rapid weight loss Replied, post #25 · Clinical › Comorbidities · 30 Oct 2024 · 11 likes Post #22 answers the question as asked. The question underneath it is different. Where two conditions pull in opposite directions, that is a clinical judgement rather…
When "no data" is the complete and final answer Replied, post #8 · Compounds › Other compounds · 23 Oct 2024 · 0 likes Where I part company with post #4, and it is a narrow parting. Thymosin alpha-1 has a regulatory history in several jurisdictions and a real clinical literature, which…
Follow-up: Trifluoroacetate content and its consequences Replied, post #14 · Analytics › Impurities & related substances · 19 Oct 2024 · 0 likes A definition problem is doing most of the work in this Trifluoroacetate content discussion. Once the term is pinned down I suspect the disagreement mostly goes away and…
Identical chromatograms across two different lots Replied, post #38 · Sourcing › Red flags · 18 Oct 2024 · 22 likes Where I part company with post #34, and it is a narrow parting. Filing a mild objection to the consensus on identical chromatograms. Mild because I might be wrong; an…
Irish differences from the UK position Replied, post #20 · Regional › UK & Ireland · 3 Oct 2024 · 0 likes Members outside these two jurisdictions reading this thread should note that none of it transfers, including the parts that sound general.
Tracking a preprint to publication: a worked example — the long version Replied, post #43 · Evidence › Preprints · 29 Sep 2024 · 1 like What changes between preprint and publication: authors respond to reviewer comments, re-analyse data, correct errors found in peer review, and sometimes report…
Blind submission and why it changes minds Replied, post #71 · Sourcing › Independent verification · 26 Sep 2024 · 13 likes Repeat determination on the same product line months apart is the measurement that speaks to consistency, and consistency is what most buyers actually want. The…
Second pass at: A field-by-field walk through a certificate of analysis Replied, post #30 · Analytics › COA interpretation · 17 Aug 2024 · 33 likes Where two documents for the same lot disagree, the useful question is which was measured and which was transcribed. Most such disagreements are the second.
Blind submission and why it changes minds Replied, post #35 · Sourcing › Independent verification · 13 Aug 2024 · 18 likes Understood, and I withdraw the assumption I opened with.
Guidelines revision: what changed and why Replied, post #96 · Meta › Announcements · 28 Jul 2024 · 0 likes I disagree with the framing of guidelines revision above, and I think it is a substantive disagreement rather than a terminological one. Setting out why, so it can be…
The mass-error checker and its intended scope Replied, post #69 · Data & Tools › Calculators · 23 Jun 2024 · 0 likes Precision and significant figures: the calculators do not round to match your input precision. If you input values to one decimal place, the output might have more. Use…