taper_file

TL3 Regular · Sheffield, UK

Laboratory background. Comfortable with chromatography, cautious about extrapolating from a single certificate.

Joined 10 September 2024 · last posted 10h · groups: analytical-chemists

127 posts, newest first. Showing up to 150.

Deletion sequences: expected mass shifts by residue — the long version Replied, post #26 · Analytics › Impurities & related substances · 27 Jul 2026 · 5 likes Aggregates: multiples of the monomer mass. May not elute at all under a standard reversed-phase method. A species that does not come off the column does not appear in…
Coming back to: Preparing for an appointment: one page, three questions Replied, post #44 · Clinical › Prescriber conversations · 24 Jul 2026 · 0 likes That is a fair summary of where the discussion has got to.
Why the Start Here categories exist, and what they are not for Replied, post #33 · Start Here › Welcome · 24 Jul 2026 · 5 likes Speaking only to Start as I have actually seen it, rather than as it is usually described: the effect is real, it is smaller than the thread suggests, and the variance…
eGFR fluctuation and the creatinine denominator problem — the long version Replied, post #25 · Clinical › Bloodwork · 22 Jul 2026 · 4 likes A trend needs at least three points to be a trend. Two points are a line and a line through noise is still a line. The interesting part of this is the exception, and I…
Revisiting: What pooling buys you and what it destroys Replied, post #100 · Evidence › Meta-analyses · 21 Jul 2026 · 6 likes Post #99 is right about the mechanism and I think understates the practical bit. Pooling buys is one of those subjects where the general answer and the answer for a…
Tracking intake honestly when appetite is absent Replied, post #106 · Nutrition & Training › Protein & intake · 20 Jul 2026 · 14 likes Liquid sources are tolerated better than solid ones by many people here, and that is a practical observation rather than a nutritional principle. This is the sort of…
Coming back to: Delayed gastric emptying and oral medication absorption: which drugs… Replied, post #42 · Practice › Interactions · 19 Jul 2026 · 4 likes Post #39 is right about the mechanism and I think understates the practical bit. Timing separation is the standard mitigation where absorption rate is the concern, and…
Coming back to: Preparing for an appointment: one page, three questions Started this topic · Clinical › Prescriber conversations · 15 Jul 2026 · 7 likes Preparing for an appointment: one page, three questions — setting out what I have, and where I think it stops being reliable. A question about how to describe something…
Second pass at: The storage lookup and where its data comes from Replied, post #43 · Data & Tools › Calculators · 9 Jul 2026 · 1 like I keep a log for storage lookup specifically because my memory of it turned out to be systematically wrong in one direction. Six weeks of notes cost nothing and settled…
Reading order for a first week here, and what to skip until later — what changed since Replied, post #23 · Start Here › Welcome · 8 Jul 2026 · 1 like Adding what did not work for me on Reading order, since the failures never get written up and they are half the useful information.
Second pass at: Metformin co-administration and additive GI effects Replied, post #140 · Practice › Interactions · 5 Jul 2026 · 0 likes Coming back to post #138, because the follow-up matters more than the original answer. SGLT2 inhibitors: frequently co-administered and relevant to renal and…
Trust level 3 requirements: a clarification — does this still hold? Replied, post #75 · Meta › Announcements · 2 Jul 2026 · 4 likes Filing a mild objection to the consensus on Trust level 3 requirements. Mild because I might be wrong; an objection because nobody has addressed the case that does not…
Bioimpedance and hydration: why the number moves Replied, post #69 · Outcomes › Body composition · 1 Jul 2026 · 18 likes On post #67 — agreed on the reasoning, with one qualification. The version of bioimpedance and hydration that circulates here is a simplification of a simplification.…
Semaglutide and gastric emptying — the mechanism behind most of the side-effect profile Replied, post #86 · Compounds › Semaglutide · 1 Jul 2026 · 18 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,…
How shortages have affected compounding permissions Replied, post #4 · Access › Shortages · 28 Jun 2026 · 29 likes Shortage-driven price movement is real and is a separate question from availability. It is the kind of thing that is obvious once and never again.
Personal or family history of medullary thyroid carcinoma Replied, post #19 · Safety › Contraindications · 26 Jun 2026 · 0 likes Allergy to the specific compound: true allergy is rare but possible. Any prior allergic reaction to the same compound or to structurally similar peptides warrants…
Journal club: STEP 1 and the treatment-policy estimand — does this still hold? Replied, post #44 · Evidence › Journal club · 17 Jun 2026 · 5 likes Reading back through the STEP 1 threads from last year, the same three questions come up every time and only one of them has ever been answered properly. That seems…
Second pass at: Sleep apnoea improving and the equipment implications Replied, post #54 · Wellbeing › Sleep · 8 Jun 2026 · 0 likes Energy and sleep needs: rapid weight loss increases real metabolic stress. Sleep needs might increase even though appetite for food has decreased. Prioritising sleep is…
An appeal that succeeded, with the letter structure — the long version Replied, post #67 · Access › Insurance & coverage · 8 Jun 2026 · 31 likes Thank you — that answers what I came here to find out.
Comparing prices across jurisdictions without misleading yourself Replied, post #50 · Access › Pricing · 7 Jun 2026 · 0 likes This follows post #48 rather than contradicting it. The most useful pricing posts here are the ones that show the arithmetic rather than the conclusion.
How to ask a question when you cannot say why you are asking it Replied, post #7 · Start Here › How to Ask · 6 Jun 2026 · 0 likes Questions you cannot explain: "I cannot say why I am asking this, but is this compound stable at room temperature?" is more productive than no question at all. People…
Official shortage notices and what they authorise Replied, post #78 · Access › Shortages · 30 May 2026 · 20 likes Pharmacy-level availability varies enormously during a shortage, so two honest accounts from the same city can be opposite. The honest answer is that it depends, and…
Manufacturer assistance programmes and their eligibility rules Replied, post #29 · Access › Pricing · 28 May 2026 · 15 likes Picking up post #28: that is the part I would want checked first. Insurance tier placement: a compound might be covered but on a higher tier (higher copay). Moving to a…
Naming conventions for research peptides and the confusion they cause Replied, post #8 · Compounds › Other compounds · 28 May 2026 · 0 likes Solubility varies far more across this subcategory than within the incretins. A compound that needs a specific diluent or a specific pH is not being difficult; it has a…
An appeal that succeeded, with the letter structure — the long version Replied, post #16 · Access › Insurance & coverage · 26 May 2026 · 5 likes Where I part company with post #14, and it is a narrow parting. Formulary status: the list of covered medications and the tier (how much you pay) they are on. Checking…
[2026 update] Waist circumference technique and its repeatability Replied, post #12 · Outcomes › Progress reports · 26 May 2026 · 4 likes Post #10 is right about the mechanism and I think understates the practical bit. The thing about Waist circumference technique that took me longest to accept is that a…
What a certificate commits its issuer to — one year on Replied, post #75 · Analytics › COA interpretation · 25 May 2026 · 1 like 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…
Follow-up: Sleep quality changes during weight loss Replied, post #22 · Wellbeing › Sleep · 14 May 2026 · 29 likes Post #18 put the caveat in the right place and I want to underline it. Consumer sleep trackers measure movement and heart rate and infer stages. The inference is…
How this community labels and discusses unrefereed work — the long version Replied, post #19 · Evidence › Preprints · 13 May 2026 · 0 likes Reading back through, this was answered upthread and I missed it. My fault.
How this community labels and discusses unrefereed work — the long version Replied, post #9 · Evidence › Preprints · 11 May 2026 · 2 likes Post #6 is right about the mechanism and I think understates the practical bit. Unrefereed work is not worthless. A great deal of it survives review substantially…
GLP-1 receptor distribution: central and peripheral Replied, post #47 · Pharmacology › Receptor biology · 10 May 2026 · 6 likes GIP receptor biology is genuinely contested. Both agonism and antagonism have been argued to produce weight reduction, and the fact that the field can hold both…
[2026 update] 0.3 mL versus 0.5 mL versus 1 mL barrels: resolution matters Replied, post #92 · Devices › Syringes & needles · 6 May 2026 · 0 likes This follows post #91 rather than contradicting it. A detachable luer needle plus hub can retain enough volume to matter. Whether it matters to you depends on your…
Personal or family history of medullary thyroid carcinoma — what changed since Replied, post #28 · Safety › Contraindications · 4 May 2026 · 11 likes Same experience here, different supplier, so it is at least not unique to one of them.
Follow-up: Comparing two chromatograms from different laboratories, properly Replied, post #20 · Analytics › HPLC & UHPLC · 1 May 2026 · 10 likes Before anything else: what was the gradient, and at what wavelength? Area percent at different wavelengths is not the same number even on the same sample because…
[2026 update] 0.3 mL versus 0.5 mL versus 1 mL barrels: resolution matters Replied, post #73 · Devices › Syringes & needles · 30 Apr 2026 · 0 likes Two questions I would want answered before drawing anything from the 0.3 ml versus 0.5 ml data above: how were the cases selected, and what happened to the ones that…
Residual solvents and scavengers: what is looked for — what changed since Replied, post #31 · Analytics › Impurities & related substances · 23 Apr 2026 · 3 likes Deamidation at asparagine and glutamine: adds 1 approximately. Frequently appears as a close-eluting pair. It is a chemical modification that occurs during storage.
Amylin receptor signalling and satiety — what changed since Replied, post #56 · Pharmacology › Receptor biology · 4 Apr 2026 · 19 likes Building on post #55 rather than restating it. Amylin receptor signalling: amylin promotes satiety and slows gastric emptying through a receptor distinct from GLP-1.…
Revisiting: Absolute versus relative contraindications Replied, post #46 · Safety › Contraindications · 18 Mar 2026 · 0 likes Concurrent insulin or sulfonylureas: not an absolute contraindication but requires dose adjustment and close monitoring for hypoglycemia. The combination is used with…
Reading a preclinical wound-healing model and its relevance to a human tendon — a second… Replied, post #39 · Compounds › Repair & healing peptides · 11 Mar 2026 · 27 likes The most useful reply I ever got about Reading a preclinical wound-healing model was a request to state my units. It sounds like pedantry and it has saved me twice.
Revisiting: Absolute versus relative contraindications Replied, post #37 · Safety › Contraindications · 5 Mar 2026 · 15 likes Right, and stated more narrowly than I would have dared to state it.
Second pass at: The topic list is dense — is that deliberate? Replied, post #86 · Meta › Site feedback · 1 Mar 2026 · 0 likes Narrowing post #83, because the general version has more than one answer. Two questions I would want answered before drawing anything from the topic list data above:…
Half-life, steady state, and accumulation worked through — a second dataset Replied, post #95 · Pharmacology › Pharmacokinetics · 1 Mar 2026 · 0 likes Terminal half-life estimated from a short sampling window underestimates the true value. That is a common source of discrepant figures between sources. I would call…
Measurement error in a self-reported exposure Replied, post #117 · Evidence › Study critique · 27 Feb 2026 · 12 likes An update on my earlier measurement error post: the pattern held for another six weeks and then stopped, which I did not predict and cannot explain.
Coming back to: Washout: how long is long enough, and for what purpose Replied, post #50 · Pharmacology › Pharmacokinetics · 22 Feb 2026 · 1 like Since Washout keeps coming up, it should probably be a maintained page rather than a recurring thread. I am happy to draft it if someone with more direct experience…
Preprint servers and what screening they do Replied, post #50 · Evidence › Preprints · 9 Feb 2026 · 4 likes Narrowing post #49, because the general version has more than one answer. Server repositories: medRxiv for medicine, bioRxiv for biology. Preprints on these servers are…
Second pass at: Circumference measurements as a poor man's composition estimate Replied, post #50 · Outcomes › Body composition · 6 Feb 2026 · 24 likes Bone mineral density changes with substantial weight loss are measurable and slow, and are one of the better reasons to have a baseline scan. A guess, clearly labelled…
Follow-up: Search filters: what is missing Replied, post #27 · Meta › Site feedback · 4 Feb 2026 · 0 likes Adding the measurement that post #24 says would settle it. Two people in this thread mean different things by Search filters and are disagreeing about the definition…
Request: export my own posts — one year on Replied, post #42 · Meta › Feature requests · 3 Feb 2026 · 0 likes Confirming post #41 from a second method, which matters more than confirming it from a second person. Duplicate requests: if several people request the same feature,…
Tracking that stops updating and then resumes — the long version Replied, post #66 · Sourcing › Logistics · 15 Jan 2026 · 2 likes That is a fair summary of where the discussion has got to.
Heterogeneity as information rather than as a nuisance Replied, post #60 · Evidence › Meta-analyses · 13 Jan 2026 · 0 likes Post #58 answers the question as asked. The question underneath it is different. Study quality and weighting: some meta-analyses weight all studies equally; others…
Distinguishing expected GI effects from something that needs urgent attention Replied, post #73 · Practice › Side effects · 11 Jan 2026 · 7 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…
Coverage in the US: a map of the usual obstacles Replied, post #33 · Regional › North America · 8 Jan 2026 · 2 likes The reason coverage keeps being re-asked is that the answer is conditional and people quote it without the condition. It is not that the answer is unknown.
[2026 update] Are there stupid questions here? A staff answer, at length Replied, post #15 · Start Here › Welcome · 6 Jan 2026 · 9 likes No disagreement from me. Posting only so the question does not look ignored.
Half-life, steady state, and accumulation worked through — a second dataset Replied, post #51 · Pharmacology › Pharmacokinetics · 3 Jan 2026 · 22 likes Area under the curve is the exposure measure that matters for most effects in this class. Peak concentration matters more for tolerability.
The decimal-point error, and the habit that catches it Replied, post #16 · Practice › Reconstitution · 14 Dec 2025 · 32 likes Decimal-point error is a question about a distribution, not about a value, and treating it as a value is what produces the confident wrong answers.
Tirzepatide in type 2 diabetes: the SURPASS programme, summarised honestly — the long… Replied, post #38 · Compounds › Tirzepatide · 5 Dec 2025 · 18 likes Adding a small correction to the Tirzepatide in type 2 diabetes summary above rather than a disagreement with it. The substance holds; one of the figures is out by a…
How to tell whether your question is already answered on a maintained page Replied, post #4 · Start Here › Welcome · 2 Dec 2025 · 0 likes The FAQ link in the sidebar is maintained and worth ten hours of forum browsing. It is not comprehensive but it is well indexed for the questions that come up most.
Coming back to: Over-dilution: when your dose falls below one readable graduation Replied, post #89 · Practice › Reconstitution · 1 Dec 2025 · 22 likes On post #87 — agreed on the reasoning, with one qualification. The best check on any reconstitution calculation is to do it twice by two different routes — mass per…
Documentation that appears only after payment Replied, post #85 · Sourcing › Red flags · 23 Nov 2025 · 4 likes The claim about documentation upthread is stronger than its source supports. I have read the source. The source says "associated with" and the post says "causes".
Temperature loggers worth the money — the long version Replied, post #77 · Devices › Cold chain · 19 Nov 2025 · 0 likes Coming back to post #74, because the follow-up matters more than the original answer. If you are not going to be there, arranging a secure delivery point is worth more…
Promotion criteria, and the one that stops most nominations — the long version Replied, post #91 · Documentation › Doc review · 11 Nov 2025 · 12 likes Reframing Promotion criteria slightly, because I think the disagreement is about the question rather than the answer. If the question is "does it happen", yes. If it is…
Sleep quality changes during weight loss — what changed since Replied, post #45 · Wellbeing › Sleep · 31 Oct 2025 · 1 like Noted, and I have changed what I was going to do on the strength of it.
Warfarin and altered intake: the monitoring argument — the long version Replied, post #41 · Practice › Interactions · 30 Oct 2025 · 0 likes SGLT2 inhibitors: frequently co-administered and relevant to renal and cardiovascular discussion, not to interactions. There is no pharmacokinetic interaction of…
Batch date after test date, and other internal inconsistencies Replied, post #8 · Analytics › COA interpretation · 12 Oct 2025 · 10 likes On batch date I would separate what is worth knowing from what is worth acting on. The first list is long and the second is short, and conflating them is how threads…
Why oral semaglutide needs an absorption enhancer at all Replied, post #40 · Compounds › Oral incretins · 10 Oct 2025 · 1 like Answering the question post #38 raises rather than the one it answers. PIONEER programme is phase 3 for oral semaglutide. The trials cover multiple indications and…
An inter-laboratory comparison on one lot, tabulated — what changed since Replied, post #4 · Analytics › Method validation · 4 Oct 2025 · 23 likes The arithmetic in post #3 is right; the assumption feeding it is the part to check. My position on inter-laboratory comparison is current rather than settled. I have…
Titles that describe the question, not the situation Replied, post #111 · Start Here › How to Ask · 2 Oct 2025 · 3 likes On post #107 — agreed on the reasoning, with one qualification. Questions you cannot explain: "I cannot say why I am asking this, but is this compound stable at room…
Why the titration planner refuses to produce a schedule below a floor Started this topic · Data & Tools › Calculators · 1 Oct 2025 · 9 likes Asking directly, because I could not find a straight answer: Why the titration planner refuses to produce a schedule below a floor Titration planner refuses — I have…
Citing a preprint in a maintained document: our rule and its reasoning — does this still… Replied, post #59 · Evidence › Preprints · 30 Sep 2025 · 9 likes Peer review catches some things reliably — missing methods, unsupported conclusions, statistical mistakes of the obvious kind — and misses others routinely. Knowing…
Reading SURMOUNT-1 without the press release — one year on Replied, post #11 · Compounds › Tirzepatide · 29 Sep 2025 · 17 likes The 2.5 mg starting dose is a tolerance step and not a therapeutic one. Judging efficacy at that dose is the single commonest reasoning error in this subcategory. The…
Revisiting: Reading a denial letter as a specification for your appeal Replied, post #132 · Access › Insurance & coverage · 23 Sep 2025 · 19 likes Post #129 and I disagree about the size of the effect, not about the direction. A clinician's supporting letter that addresses the criteria explicitly is worth…
[2026 update] What the GIP component of tirzepatide is thought to contribute, and how… Replied, post #123 · Compounds › Tirzepatide · 12 Sep 2025 · 0 likes Categorical response thresholds — the proportion reaching ten, fifteen or twenty per cent reduction — are more persuasive and less informative than the mean. They…
What the GIP component of tirzepatide is thought to contribute, and how confident we can… Replied, post #34 · Compounds › Tirzepatide · 1 Sep 2025 · 2 likes Post #33 answers the question as asked. The question underneath it is different. On purity: the trailing-edge features people report on tirzepatide chromatograms are…
Follow-up: History of disordered eating and why it changes the conversation Replied, post #69 · Clinical › Special populations · 28 Aug 2025 · 29 likes I read the earlier replies on History of disordered eating twice before writing this, because I had assumed the opposite and wanted to be sure I was disagreeing with…
The "under review" status pill and when a moderator applies it — a second dataset Replied, post #26 · Evidence › Preprints · 19 Aug 2025 · 31 likes Reading a preprint properly means doing some of the reviewer's job: methods first, then whether the analysis matches the plan, then the conclusion.
Tracking that stops updating and then resumes — the long version Replied, post #6 · Sourcing › Logistics · 17 Aug 2025 · 28 likes Peak periods and public holidays affect this more than any other factor and are entirely predictable in advance.
Semaglutide versus liraglutide head to head: reading STEP 8 carefully Replied, post #43 · Compounds › Semaglutide · 17 Aug 2025 · 17 likes That is the distinction I keep failing to hold on to. Written down now.
The nausea timeline across the first four weeks, with a tabulated log — what changed since Replied, post #3 · Practice › Side effects · 3 Aug 2025 · 0 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…
Pages past their review date, listed Replied, post #13 · Meta › Wiki maintenance · 3 Aug 2025 · 12 likes Reporting an inconsistency between two maintained pages rather than an error in either. They use the same term for different quantities, and both are internally coherent.
Coming back to: An 18-month record including the parts that went badly Replied, post #88 · Outcomes › Progress reports · 31 Jul 2025 · 18 likes Post #86 put the caveat in the right place and I want to underline it. Plateaus and resets: if weight loss stalls and then resumes, that is ordinary. It is not evidence…
[2026 update] Cardiovascular risk: reading the outcome trials as a set Replied, post #73 · Clinical › Comorbidities · 17 Jul 2025 · 0 likes Grateful for the specificity. Vague answers to this question are what sent me looking.
Discussing something you have already been doing — the long version Replied, post #12 · Clinical › Prescriber conversations · 10 Jul 2025 · 8 likes Everything in post #8 holds. The case it does not cover is the one I have. Discussing off-label dosing: if you want to dose differently than the label specifies (slower…
[2026 update] Clearance pathways and what renal impairment changes Replied, post #59 · Pharmacology › Pharmacokinetics · 22 Jun 2025 · 26 likes A pharmacokinetic model fitted to trial data describes the population studied. Applying it to somebody outside the enrolled range is an extrapolation, and the model…
Half-life, steady state, and accumulation worked through Replied, post #119 · Pharmacology › Pharmacokinetics · 15 Jun 2025 · 0 likes A request rather than an answer: could whoever has the primary source for half-life post it? I have seen the claim three times this month and each version had lost a…
Second pass at: Trial registration and comparing the protocol with the paper Replied, post #26 · Evidence › Trials · 11 Jun 2025 · 0 likes Worth separating two things that post #24 runs together. Safety findings from a trial powered for efficacy are underpowered by construction. Absence of a signal in that…
[2026 update] An appeal that failed, and what I would do differently Replied, post #43 · Access › Insurance & coverage · 9 Jun 2025 · 3 likes Where I have landed on appeal, having got it wrong once in public: the direction is clear, the magnitude is not, and anyone quoting a precise magnitude has borrowed it…
Obstructive sleep apnoea and a hard endpoint in this class Replied, post #102 · Clinical › Comorbidities · 2 Jun 2025 · 15 likes The arithmetic in post #99 is right; the assumption feeding it is the part to check. I would call the community position on obstructive sleep apnoea likely rather than…
Telehealth prescribing models in the US Replied, post #102 · Regional › North America · 22 May 2025 · 0 likes Following, with nothing to contribute beyond having asked the same thing elsewhere.
Sequence verification for an obscure compound: how it is done Replied, post #41 · Compounds › Other compounds · 22 May 2025 · 29 likes Anyone submitting an unusual compound for testing should tell the laboratory what it is rather than what it is sold as. Method selection depends on the structure and…
What SELECT changed about how semaglutide is discussed, and what it did not Replied, post #127 · Compounds › Semaglutide · 21 May 2025 · 26 likes I read post #125 twice before replying, because I had assumed the opposite. What I can speak to on SELECT is narrow, so I will keep it narrow rather than generalising…
Journal club: STEP 1 and the treatment-policy estimand — does this still hold? Replied, post #114 · Evidence › Journal club · 22 Apr 2025 · 32 likes I read post #112 twice before replying, because I had assumed the opposite. The strongest argument against my own position on STEP 1, stated as well as I can state it,…
Regression to the mean in progress reports Replied, post #3 · Research Methods › Statistics · 21 Apr 2025 · 3 likes Bayesian and frequentist analyses answer different questions and both are legitimate. What matters is that the reader knows which is on offer. I have deliberately not…
A well-designed study with a badly written abstract Replied, post #35 · Evidence › Study critique · 21 Apr 2025 · 11 likes Attrition is the failure mode most likely to invalidate a result and the least likely to be discussed. Differential attrition between arms is the specific thing to look…
Reading an MS report that only gives you a single number Replied, post #46 · Analytics › Mass spectrometry · 6 Apr 2025 · 13 likes The honest summary of what a mass result buys you: it narrows the field of what the material could be, considerably. It never closes it, and no certificate should be…
Follow-up: Open-label extensions: what survives and what does not Replied, post #23 · Evidence › Trials · 1 Apr 2025 · 1 like An open-label trial is not worthless and its subjective endpoints deserve more scepticism than its objective ones. That is a graded judgement rather than a verdict.…
Why cagrilintide alone is discussed so much less than in combination Replied, post #56 · Compounds › Cagrilintide & amylin analogues · 29 Mar 2025 · 2 likes Cagrilintide is a long-acting amylin analogue, which puts it in a different mechanistic family from the incretin agonists it is usually discussed alongside. Amylin…
Reading an MS report that only gives you a single number Replied, post #37 · Analytics › Mass spectrometry · 25 Mar 2025 · 28 likes Where I part company with post #33, and it is a narrow parting. Positional isomers and epimers are mass-identical. Any argument that a mass result rules them out is…
Maintainer handover: how it works Replied, post #82 · Meta › Wiki maintenance · 19 Mar 2025 · 0 likes Maintainer handovers: if a page's maintainer is inactive and needs a new one, discussing that here can facilitate the transition. That is where I would start, not where…
Maintainer handover: how it works Replied, post #61 · Meta › Wiki maintenance · 17 Mar 2025 · 0 likes Careful with that. A short duplicated paragraph is sometimes better than a link, because the reader who needs it is mid-task and will not follow a link. The test is…
Review: a draft on reconstitution arithmetic, with objections Replied, post #61 · Documentation › Doc review · 16 Mar 2025 · 2 likes Everything in post #57 holds. The case it does not cover is the one I have. Review date disputes: if a maintained page's review date is approaching and it has not been…
Delayed gastric emptying and oral medication absorption: which drugs matter Replied, post #10 · Practice › Interactions · 8 Mar 2025 · 9 likes That matches what I have seen, for whatever a single anecdote is worth.
Research-use-only labelling: what it means and what it does not — the long version Replied, post #93 · Sourcing › Regulatory · 26 Feb 2025 · 0 likes Post #90 and I disagree about the size of the effect, not about the direction. Second-hand on Research-use-only labelling, so weight it accordingly — someone whose…
Albumin binding and how it produces a long half-life Replied, post #8 · Pharmacology › Pharmacokinetics · 22 Feb 2025 · 7 likes The arithmetic in post #7 is right; the assumption feeding it is the part to check. The bit of albumin binding that nobody enjoys is that the answer changes depending…
Distinguishing a deletion sequence by mass alone Replied, post #103 · Analytics › Mass spectrometry · 18 Feb 2025 · 5 likes An update on my earlier distinguishing a deletion sequence post: the pattern held for another six weeks and then stopped, which I did not predict and cannot explain.
Preparing for an appointment: one page, three questions Replied, post #8 · Clinical › Prescriber conversations · 18 Feb 2025 · 26 likes A second opinion is a normal part of medicine rather than an accusation, and asking how to obtain one is a legitimate question.
Consistent declarations and why they matter more than clever ones Replied, post #2 · Sourcing › Logistics · 5 Feb 2025 · 6 likes Consistent declarations: I would want to see the raw numbers rather than the summary before agreeing. Summaries lose exactly the information that would settle this.
Biased agonism: a real phenomenon, an over-used explanation — what changed since Replied, post #42 · Pharmacology › Receptor biology · 4 Feb 2025 · 5 likes I have no financial interest in anything named in this thread and I want to say so before I comment on Biased agonism, because it is the sort of subject where it matters.
Distinguishing a deletion sequence by mass alone Replied, post #26 · Analytics › Mass spectrometry · 28 Jan 2025 · 1 like Nothing to add on the substance. Thank you for taking the question at face value.
Feature request: should a dose-equivalence tool exist at all? Replied, post #17 · Data & Tools › Calculators · 22 Jan 2025 · 16 likes Following, with nothing to contribute beyond having asked the same thing elsewhere.
Recovery when intake is low: what to cut first Replied, post #56 · Nutrition & Training › Resistance training · 13 Jan 2025 · 1 like On recovery the community has more anecdote than the confidence in this thread implies, and I include my own contribution in that.
Distinguishing a deletion sequence by mass alone — the long version Started this topic · Analytics › Mass spectrometry · 13 Jan 2025 · 11 likes On the subject in the title: Distinguishing a deletion sequence by mass alone — the long version Working notes rather than a conclusion. A narrow question about…
Revisiting: Bug report: the reconstitution calculator and a rounding edge case Replied, post #48 · Data & Tools › Calculators · 11 Jan 2025 · 0 likes Titration planning: a calculator that shows you the escalation schedule for different starting and ending doses can help you visualize your path. Actual path might be…
A promotion I argued against, and why I lost Replied, post #55 · Documentation › Doc review · 8 Jan 2025 · 0 likes Thank you — that answers what I came here to find out.
Books and papers worth reading that are not about this at all Replied, post #3 · Lounge › Off topic · 29 Dec 2024 · 5 likes Lounge-appropriate observation. I have started reading the certificates that come with things I buy that have nothing to do with any of this, and the standard elsewhere…
About the Wiki requests category Replied, post #3 · Documentation › Wiki requests · 14 Dec 2024 · 0 likes As a member rather than staff: the most useful thing I did when I started reading this category was to work through the tag pages rather than the topic list. The topic…
Washout with a one-week half-life: the arithmetic Replied, post #55 · Research Methods › N-of-1 designs · 2 Dec 2024 · 0 likes The arithmetic in post #53 is right; the assumption feeding it is the part to check. It does not tell you about anybody else, which is why aggregating these accounts…
Second pass at: Pharmacy supply in the UK and the questions you will be asked Replied, post #3 · Regional › UK & Ireland · 2 Dec 2024 · 0 likes The honest answer on Pharmacy supply 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…
Identical chromatograms across two different lots Replied, post #54 · Sourcing › Red flags · 26 Nov 2024 · 19 likes A request rather than an answer: could whoever has the primary source for identical chromatograms post it? I have seen the claim three times this month and each version…
EMA product information as a primary source — does this still hold? Replied, post #10 · Regional › European Union · 14 Nov 2024 · 2 likes Reading this EMA product information thread as someone who came in with a fixed view: the third and seventh replies moved me and the confident ones did not.
Time to steady state after a dose increase Replied, post #28 · Pharmacology › Pharmacokinetics · 3 Nov 2024 · 3 likes Area under the curve is the exposure measure that matters for most effects in this class. Peak concentration matters more for tolerability. Second-hand, so weight it…
Progressive overload when the scale is falling — one year on Replied, post #88 · Nutrition & Training › Resistance training · 24 Sep 2024 · 7 likes Adding a note of thanks rather than an opinion. I did not know most of that.
Revisiting: How to bring a laboratory report to an appointment usefully Replied, post #39 · Clinical › Bloodwork · 18 Sep 2024 · 0 likes The number people quote for bring a laboratory is a central estimate presented without its interval, and the interval is wide enough that the estimate is nearly…
Coming back to: What consumer-accessible tests can and cannot determine Replied, post #6 · Analytics › Home & field testing · 15 Sep 2024 · 2 likes Precision of home tests: most consumer-accessible devices are not precise to the level people want ("is this 99% pure or 97% pure"). They give a yes/no or a rough…
Identical chromatograms across two different lots Replied, post #18 · Sourcing › Red flags · 25 Aug 2024 · 14 likes Small correction to my own earlier position on identical chromatograms. I had the units the wrong way round, which changes the conclusion by an order of magnitude and…
Transit times by route, from a logged dataset — the long version Replied, post #5 · Sourcing › Logistics · 13 Aug 2024 · 0 likes Post #4 is right about the mechanism and I think understates the practical bit. Peak periods and public holidays affect this more than any other factor and are entirely…
Tracking a preprint to publication: a worked example — the long version Replied, post #15 · Evidence › Preprints · 11 Jul 2024 · 20 likes This settles it for me, at least until somebody posts a reason it should not.
How this community labels and discusses unrefereed work Replied, post #4 · Evidence › Preprints · 4 Jun 2024 · 6 likes I read the earlier replies on community labels twice before writing this, because I had assumed the opposite and wanted to be sure I was disagreeing with what was said…