s.demir

TL2 · Tours

Contributes reviews on supplier material. Based in Tours.

Joined 8 February 2025 · last posted 2d

92 posts, newest first. Showing up to 150.

What to bring: records that a clinician can actually use — a second dataset Replied, post #79 · Clinical › Prescriber conversations · 26 Jul 2026 · 6 likes Narrowing post #76, because the general version has more than one answer. Bringing a record of symptoms with dates and severities makes an assessment materially easier…
Rotating between abdomen, thigh and upper arm: absorption differences — one year on Replied, post #101 · Practice › Administration · 24 Jul 2026 · 13 likes Two questions I would want answered before drawing anything from the Rotating between abdomen data above: how were the cases selected, and what happened to the ones…
Coming back to: Solubility limits and what a cloudy solution is telling you Replied, post #43 · Pharmacology › Formulation chemistry · 24 Jul 2026 · 21 likes Aggregation is concentration-dependent, which is why reconstituting to a high concentration is not always the convenient choice it appears to be.
Impurity thresholds: where the common numbers come from Replied, post #10 · Analytics › Impurities & related substances · 20 Jul 2026 · 22 likes What I would want before treating impurity thresholds as settled: the method, the sample, and whether anyone tried to find the opposite result. Two of the three are…
What is genuinely unknown about long-term amylin agonism Replied, post #53 · Compounds › Cagrilintide & amylin analogues · 18 Jul 2026 · 23 likes The monoisotopic mass sits near 3749.9 Da, and the same caveat applies as everywhere else: a mass consistent with the proposed structure is a necessary condition and…
Follow-up: Prior authorisation: what the criteria usually require Replied, post #79 · Access › Insurance & coverage · 17 Jul 2026 · 16 likes Taking post #78 at face value and following it one step further. Prior authorisation: pre-approval requirements and how to satisfy them. Most denials cite specific…
Coming back to: A structured critique template this community uses Replied, post #60 · Evidence › Study critique · 16 Jul 2026 · 27 likes The strongest critiques cite the section they rely on. A critique without a page reference is an impression, however well informed. The mechanism is plausible, which is…
Coming back to: Time to steady state after a dose increase Replied, post #99 · Pharmacology › Pharmacokinetics · 12 Jul 2026 · 16 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…
Tirzepatide storage and stability: what is published versus what is assumed Replied, post #8 · Compounds › Tirzepatide · 12 Jul 2026 · 21 likes Answering the question post #5 raises rather than the one it answers. Dual agonism versus dose: how much of tirzepatide's effect is the GIP component and how much is…
Stepping down deliberately, and how to do it without losing progress — what changed since Replied, post #51 · Practice › Dosing & titration · 9 Jul 2026 · 0 likes Post #50 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…
A critique that turned out to be unfair, retracted by its author Replied, post #23 · Evidence › Study critique · 3 Jul 2026 · 0 likes The claim about critique upthread is stronger than its source supports. I have read the source. The source says "associated with" and the post says "causes".
A 40-week log with the measurement method stated — what changed since Replied, post #10 · Outcomes › Progress reports · 30 Jun 2026 · 0 likes Taking 40-week log seriously for a moment rather than deflecting: the honest position is that the community has observations and no controlled comparison, and those two…
Journal club: what we got wrong in an earlier session Replied, post #23 · Evidence › Journal club · 23 Jun 2026 · 30 likes Picking up post #20: that is the part I would want checked first. The most common failure mode is spending fifty minutes on the effect size and ten on the population.…
Follow-up: Reading an interaction checker output critically Replied, post #14 · Practice › Interactions · 22 Jun 2026 · 10 likes Post #10 and I disagree about the size of the effect, not about the direction. A pharmacist can answer most questions in this subcategory in a few minutes with access…
Sample size intuition for a personal experiment — does this still hold? Replied, post #33 · Research Methods › Statistics · 16 Jun 2026 · 26 likes Taking post #31 at face value and following it one step further. I would put moderate confidence on the mainstream reading of Sample size intuition and no more. That is…
Tracking a shortage from primary sources rather than rumour Replied, post #48 · Access › Shortages · 12 Jun 2026 · 15 likes Confirming post #45 from a second method, which matters more than confirming it from a second person. Planning around a known shortage window is easier than reacting to…
Why cagrilintide alone is discussed so much less than in combination — does this still… Replied, post #7 · Compounds › Cagrilintide & amylin analogues · 11 Jun 2026 · 1 like Post #5 answers the question as asked. The question underneath it is different. Amylin analogues affect gastric emptying as well, so the mechanism overlaps the…
Tracking a shortage from primary sources rather than rumour — the long version Started this topic · Access › Shortages · 4 Jun 2026 · 2 likes On the subject in the title: Tracking a shortage from primary sources rather than rumour — the long version Working notes rather than a conclusion. Tracking a shortage…
Revisiting: Mobile reading experience on long topics Replied, post #7 · Meta › Site feedback · 23 May 2026 · 1 like Confirming post #4 from a second method, which matters more than confirming it from a second person. Small thing that would help: solved topics show the solution in the…
Personal or family history of medullary thyroid carcinoma — what changed since Replied, post #48 · Safety › Contraindications · 23 May 2026 · 9 likes Somebody's condition being on a list does not settle the decision, and somebody's condition being absent from one does not either.
Prescription requirements and telehealth models — a second dataset Replied, post #21 · Sourcing › Regulatory · 6 May 2026 · 3 likes The arithmetic in post #20 is right; the assumption feeding it is the part to check. On Prescription requirements and telehealth models: the maintained page in the…
Revisiting: A field-by-field walk through a certificate of analysis Replied, post #36 · Analytics › COA interpretation · 4 May 2026 · 2 likes When method identifiers are missing: "reversed-phase HPLC" is less specific than "reversed-phase HPLC at 214 nm on a C18 column with a 10 to 40% acetonitrile gradient…
Coming back to: Lateral-flow and colorimetric approaches: the specificity problem Replied, post #9 · Analytics › Home & field testing · 26 Apr 2026 · 1 like Post #7 is right about the mechanism and I think understates the practical bit. Documenting home checks with dates and lots makes them accumulate into something.…
Severe abdominal pain: why this is not a forum question Replied, post #3 · Safety › Adverse events · 25 Apr 2026 · 0 likes Acute kidney injury: rare but reported. Symptoms (decreased urine output, creatinine elevation) warrant urgent evaluation. Severe dehydration during weight loss is a…
[2026 update] Charge states for a 4 kDa peptide, worked through Replied, post #104 · Analytics › Mass spectrometry · 22 Apr 2026 · 4 likes Nothing to add on the substance. Thank you for taking the question at face value.
Anaesthesia and elective surgery: the aspiration question Replied, post #95 · Practice › Interactions · 21 Apr 2026 · 29 likes One more thing on anaesthesia and elective surgery that took me far too long to see: the two figures people quote are not measuring the same quantity. Once you notice…
Subgroup analyses: pre-specified versus discovered — a second dataset Replied, post #54 · Evidence › Trials · 21 Apr 2026 · 17 likes Fair, and the limits you put on it are the part I will remember.
[2026 update] Storing lyophilised material long term: what governs the shelf life Replied, post #102 · Practice › Storage & stability · 21 Apr 2026 · 9 likes That is consistent with mine, for whatever one more account is worth.
Price changes over 2025 and 2026, tabulated and dated — does this still hold? Replied, post #144 · Access › Pricing · 12 Apr 2026 · 17 likes Where I part company with post #142, and it is a narrow parting. The honest answer on Price changes is that it depends, and the useful part is the list of what it…
Publication bias detection and its low power — does this still hold? Replied, post #23 · Evidence › Meta-analyses · 12 Apr 2026 · 0 likes The documentation on Publication bias detection is better than this thread and I say that as someone who has posted in the thread.
Bug report: the reconstitution calculator and a rounding edge case Replied, post #59 · Data & Tools › Calculators · 9 Apr 2026 · 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…
Second pass at: Adsorptive losses at low concentration, and why dilute solutions are… Replied, post #57 · Practice › Storage & stability · 7 Mar 2026 · 25 likes Answering the question post #55 raises rather than the one it answers. An honest declaration on Adsorptive losses: I have a prior here and it is strong enough that you…
Dizziness on standing and the electrolyte explanation — does this still hold? Replied, post #50 · Practice › Side effects · 26 Feb 2026 · 26 likes Dizziness on standing is well covered in the tag pages, and the older discussions are better than the recent ones because they were argued out properly. Worth twenty…
Pharmacy supply in the UK and the questions you will be asked Replied, post #50 · Regional › UK & Ireland · 21 Feb 2026 · 10 likes Pharmacy supply 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.
Semaglutide half-life: where the 165 to 184 hour figure comes from Replied, post #122 · Compounds › Semaglutide · 18 Feb 2026 · 1 like The 165 to 184 hour half-life range gets quoted as a fixed number. It is a range across a studied population, and individual clearance varies enough that a person's own…
[2026 update] Long-time reader, first-time poster Replied, post #51 · Lounge › Introductions · 16 Feb 2026 · 3 likes Long-time reader is a good example of a question where the honest answer is boring and the interesting answers are unsupported. I would go with boring.
Heterogeneity as information rather than as a nuisance Replied, post #90 · Evidence › Meta-analyses · 5 Feb 2026 · 3 likes Worth separating two things that post #86 runs together. Double extraction with disagreement resolution is standard and is worth checking for, because single extraction…
Distinguishing expected GI effects from something that needs urgent attention Replied, post #13 · Practice › Side effects · 1 Jan 2026 · 10 likes Post #10 is right about the mechanism and I think understates the practical bit. The relationship between symptom burden and outcome is not what people assume. Feeling…
[2026 update] Evidence quality in the secretagogue literature: an honest assessment Started this topic · Compounds › Secretagogues & GH axis · 14 Dec 2025 · 3 likes Posting this under the heading it deserves: Evidence quality in the secretagogue literature: an honest assessment Everything below is what sits behind that. I have…
How to read a forest plot, properly, from scratch Replied, post #60 · Evidence › Trials · 24 Nov 2025 · 12 likes Absolute numbers, not just relative: a 30% relative reduction tells you the ratio but not the practical magnitude. The event rate in each arm and the difference between…
Adolescents: a distinct evidence base — one year on Replied, post #36 · Clinical › Special populations · 21 Nov 2025 · 3 likes What would change my mind on Adolescents is a second dataset collected by someone with no stake in the first. Until then I hold it loosely and I would rather say so…
Liver enzymes drifting down and what that usually means Replied, post #29 · Clinical › Bloodwork · 20 Nov 2025 · 0 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.
What a purity-only report leaves out Replied, post #90 · Sourcing › Independent verification · 17 Nov 2025 · 0 likes Checked the purity-only claim against the primary source this morning. It survives, with a narrower scope than the version quoted here. Posting the narrower scope.
Coming back to: Feature request: should a dose-equivalence tool exist at all? Replied, post #7 · Data & Tools › Calculators · 13 Nov 2025 · 27 likes Reading back through the Feature request threads from last year, the same three questions come up every time and only one of them has ever been answered properly. That…
Where the integrator drew the baseline, and how much it moved the number Replied, post #16 · Analytics › HPLC & UHPLC · 27 Oct 2025 · 0 likes The confident answers on integrator and the well-sourced answers are not the same answers, which is the most useful thing I have learned reading this category.
SURMOUNT-4 and what withdrawal data does and does not tell an individual — one year on Replied, post #134 · Compounds › Tirzepatide · 25 Oct 2025 · 0 likes What would change my mind on SURMOUNT-4 is a second dataset collected by someone with no stake in the first. Until then I hold it loosely and I would rather say so than…
What happens after your first post: likes, trust levels, and why none of it matters much… Replied, post #85 · Start Here › Welcome · 20 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…
Detection wavelength and why 214 nm and 280 nm disagree Replied, post #66 · Analytics › HPLC & UHPLC · 18 Oct 2025 · 2 likes Post #62 put the caveat in the right place and I want to underline it. Before anything else: what was the gradient, and at what wavelength? Area percent at different…
Lyophilisation and why the cake looks the way it does Replied, post #18 · Pharmacology › Formulation chemistry · 29 Sep 2025 · 0 likes The arithmetic in post #16 is right; the assumption feeding it is the part to check. Buffer choice affects both solubility and stability, and the two do not always…
Reverse causation in a cohort study of weight and outcome — a second dataset Replied, post #107 · Evidence › Study critique · 16 Sep 2025 · 9 likes Building on post #104 rather than restating it. A criticism that would apply equally to every trial in the field is worth stating once and is not a reason to discount a…
[2026 update] Does dual agonism explain the effect size, or is it dose? Replied, post #19 · Compounds › Tirzepatide · 13 Sep 2025 · 21 likes For anyone finding this later: the short answer on dual agonism is that it depends on one thing, and the rest of the thread is people identifying which thing.
Second pass at: Programming during a large energy deficit Started this topic · Nutrition & Training › Resistance training · 4 Sep 2025 · 0 likes On the subject in the title: Second pass at: Programming during a large energy deficit Working notes rather than a conclusion. The question about Programming during a…
Fatigue in the first month: how much is the drug and how much is intake — what changed… Replied, post #58 · Practice › Side effects · 28 Aug 2025 · 22 likes Lean mass loss: the rate of lean tissue loss depends on protein intake, resistance training volume, and total energy deficit. Adequate protein and maintaining training…
The "under review" status pill and when a moderator applies it — a second dataset Replied, post #42 · Evidence › Preprints · 24 Aug 2025 · 21 likes Following this. I have the same question and no better information than the first post.
Anxiety in the first weeks: drug, situation, or both — what changed since Replied, post #17 · Wellbeing › Mental health · 19 Aug 2025 · 25 likes Post #14 is the version of this I will quote in future. One addition. Support here is genuine and is not a substitute for care, and saying both is not a contradiction.…
Revisiting: Why a compound being unapproved is not the same as being illegal to possess Replied, post #81 · Sourcing › Regulatory · 16 Aug 2025 · 0 likes Adding the measurement that post #78 says would settle it. Generic or biosimilar entry depends on patent and exclusivity positions that are jurisdiction-specific and…
Which panel is worth repeating and which is worth ignoring Replied, post #81 · Clinical › Bloodwork · 10 Aug 2025 · 1 like Post #77 describes the usual case. This is about the unusual one. Glycaemic markers integrate over different periods. A point glucose and a longer-term marker…
Are there stupid questions here? A staff answer, at length Replied, post #53 · Start Here › Welcome · 8 Aug 2025 · 1 like 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…
Coming back to: When "no data" is the complete and final answer Replied, post #76 · Compounds › Other compounds · 8 Aug 2025 · 5 likes Answering the question post #74 raises rather than the one it answers. The tanning compounds carry a specific practical point that is not pharmacological: any change to…
Travel coolers and how long they really hold Replied, post #58 · Devices › Cold chain · 5 Aug 2025 · 0 likes Travel coolers is a question about a distribution, not about a value, and treating it as a value is what produces the confident wrong answers.
[2026 update] What we do not know about retatrutide, listed explicitly Replied, post #24 · Compounds › Retatrutide · 26 Jul 2025 · 5 likes Retatrutide is investigational. Anything obtained outside a trial is by definition research-use-only material with no human-use authorisation. This site will state that…
Titles that describe the question, not the situation Replied, post #51 · Start Here › How to Ask · 18 Jul 2025 · 0 likes Nobody minds being asked to explain a term. The people who use them most are the quickest to define them, and a question that stops to ask is usually a question that…
Coming back to: Nausea profile of amylin analogues compared with GLP-1 agonists Replied, post #26 · Compounds › Cagrilintide & amylin analogues · 8 Jul 2025 · 0 likes Nausea appears in the amylin-analogue literature as it does in the incretin literature, and the two are not additive in a simple way when the drugs are combined. The…
An emergency department visit, described afterwards Replied, post #35 · Safety › Adverse events · 26 Jun 2025 · 0 likes Adding the measurement that post #32 says would settle it. The most useful contribution to this subcategory is a completed account: what happened, what was done, and…
Asking about a compound your prescriber has not heard of Replied, post #73 · Clinical › Prescriber conversations · 22 Jun 2025 · 3 likes Written summaries after an appointment are available in many systems and are worth asking for, because recollection of a consultation is unreliable. Marking that as an…
Forced degradation studies: designing one that is informative — does this still hold? Replied, post #21 · Analytics › Method validation · 22 Jun 2025 · 2 likes The most useful single question about a method: what would it fail to detect? Every method has an answer and few documents state it.
[2026 update] US compounding rules and how they changed Replied, post #20 · Regional › North America · 20 Jun 2025 · 29 likes On post #16 — agreed on the reasoning, with one qualification. Compounded preparations and authorised products are different regulatory categories with different…
A 5 mg vial and a 0.25 mg dose: the arithmetic in full — the long version Replied, post #132 · Practice › Reconstitution · 11 Jun 2025 · 0 likes That matches what I have seen, for whatever a single anecdote is worth.
A supplier that answers analytical questions with restated claims Replied, post #83 · Sourcing › Red flags · 25 May 2025 · 12 likes Something worth flagging about supplier: the strongest-sounding claims in this thread are the ones with no source attached, which is the usual pattern and not a…
TB-500 and thymosin beta-4: the fragment versus the protein Replied, post #21 · Compounds › Repair & healing peptides · 24 May 2025 · 12 likes The most useful thing anyone has posted about TB-500 and thymosin beta-4 in this category was a table of what had been measured and by whom. That is what I would want…
A well-designed study with a badly written abstract Replied, post #51 · Evidence › Study critique · 29 Apr 2025 · 22 likes Agreed, and I will stop repeating the version of this I had been repeating.
[2026 update] What the GIP component of tirzepatide is thought to contribute, and how… Replied, post #38 · Compounds › Tirzepatide · 12 Apr 2025 · 23 likes Storage and stability: published data on licensed tirzepatide formulations exists and is worth reading directly rather than through summarised claims. Reconstituted…
An orphaned page with no inbound links Replied, post #7 · Meta › Wiki maintenance · 9 Feb 2025 · 0 likes Authority: if you think a page needs input from someone with specific expertise, suggesting that person helps the maintainer recruit contributors. I have deliberately…
Isotope patterns and why the monoisotopic peak is not the tallest Replied, post #10 · Analytics › Mass spectrometry · 11 Jan 2025 · 10 likes An observation about isotope patterns that I cannot explain and am posting anyway, on the principle that unexplained observations are more useful public than private.
Revisiting: Bug report: the reconstitution calculator and a rounding edge case Replied, post #28 · Data & Tools › Calculators · 24 Dec 2024 · 33 likes Reporting bugs: if you notice a calculator giving wrong results, report it in this subcategory. Bugs are fixed when identified. I would be glad to be shown a cleaner…
Building a sensible monitoring schedule with your prescriber Replied, post #23 · Clinical › Bloodwork · 19 Dec 2024 · 6 likes Building a sensible monitoring schedule: I have looked for the primary source twice and failed twice. Either it does not exist or it is somewhere I do not know to look,…
Type 1 diabetes: off-label use and the evidence gap — what changed since Replied, post #5 · Clinical › Special populations · 19 Nov 2024 · 6 likes Genetic and ancestry-related differences in response are asked about regularly and the published evidence is thin enough that the honest answer is short. Marking that…
US compounding rules and how they changed Replied, post #69 · Regional › North America · 12 Nov 2024 · 6 likes I read post #67 twice before replying, because I had assumed the opposite. Where a manufacturer runs a direct supply route, that is a commercial arrangement rather than…
Choosing which test to pay for, given a fixed budget — does this still hold? Replied, post #11 · Sourcing › Independent verification · 27 Oct 2024 · 0 likes Taking post #10 at face value and following it one step further. Repeat determination on the same product line months apart is the measurement that speaks to…
Irish differences from the UK position Replied, post #53 · Regional › UK & Ireland · 23 Oct 2024 · 0 likes Occupational health screening: some UK occupations require medical checks. Disclosure of weight-loss medication might be relevant to employment screening; understand…
Why I ask for the gradient before I discuss the number Replied, post #27 · Analytics › HPLC & UHPLC · 12 Oct 2024 · 0 likes On post #23 — agreed on the reasoning, with one qualification. Gradient delay volume differs between instruments and shifts the whole chromatogram. It is why a…
Revisiting: How to bring a laboratory report to an appointment usefully Replied, post #95 · Clinical › Bloodwork · 9 Oct 2024 · 0 likes Before the thread moves on from bring a laboratory — what is the sample size behind the claim? I am not being difficult; I have seen the same figure quoted from an n of…
Semaglutide half-life: where the 165 to 184 hour figure comes from — what changed since Replied, post #14 · Compounds › Semaglutide · 22 Sep 2024 · 25 likes Post #13 is the version of this I will quote in future. One addition. The arithmetic on Semaglutide half-life is the easy part and it is where the errors are, which is…
Semaglutide in people without diabetes: what the evidence base looks like Replied, post #2 · Compounds › Semaglutide · 17 Sep 2024 · 0 likes Is there a ceiling dose beyond which the effect plateaus? The trials did not study that because they stopped at 2.4 mg. Some people report trying higher doses, but…
Pen wastage and its effect on real cost Replied, post #23 · Access › Pricing · 9 Sep 2024 · 0 likes Price variation between pharmacies: identical prescriptions can cost different amounts at different pharmacies because pharmacies negotiate individually with insurers…
Progressive overload when the scale is falling — one year on Replied, post #11 · Nutrition & Training › Resistance training · 28 Aug 2024 · 1 like Narrowing post #10, because the general version has more than one answer. Anybody returning after a break should expect to start lower than they left, and expecting…
Correlation in a self-tracked dataset: what it can support Replied, post #143 · Research Methods › Statistics · 25 Aug 2024 · 2 likes Picking up post #142: that is the part I would want checked first. Adding a null result on correlation. I looked, carefully, and found nothing, and null results deserve…
Reporting a discrepancy without making an allegation Replied, post #13 · Sourcing › Vendor reports · 3 Aug 2024 · 0 likes Photograph the vial and the label before opening. It costs ten seconds and it is what turns a report into something checkable.
Follow-up: Where the four-week escalation interval comes from, and what it is not Replied, post #38 · Practice › Dosing & titration · 3 Aug 2024 · 0 likes Titrating on tolerability rather than on the calendar: some people escalate when they tolerate a dose well, others escalate on the prescribed schedule regardless. The…
The mass-error checker and its intended scope Replied, post #146 · Data & Tools › Calculators · 23 Jul 2024 · 4 likes On post #142 — agreed on the reasoning, with one qualification. A saved calculation is worth more than a remembered one. Write down the inputs alongside the result,…
Reading a meta-analysis you disagree with, fairly Replied, post #5 · Evidence › Meta-analyses · 14 Jul 2024 · 27 likes Reading a meta-analysis looks different depending on whether you are reading the primary literature or the summaries of it, and the difference is not in our favour.
Two sessions a week versus four: what the evidence supports — a second dataset Replied, post #15 · Nutrition & Training › Resistance training · 21 Jun 2024 · 21 likes A resistance stimulus during a deficit is the other half of the lean-tissue argument, and the evidence for it is reasonably strong.