e.kuipers

TL2 · Mombasa

Contributes reviews on supplier material. Based in Mombasa.

Joined 25 September 2025 · last posted 3d

73 posts, newest first. Showing up to 150.

Deletion sequences: expected mass shifts by residue — the long version Replied, post #23 · Analytics › Impurities & related substances · 25 Jul 2026 · 9 likes Narrowing post #20, because the general version has more than one answer. Relative response factors mean impurities are not detected in proportion to how much of them…
Coming back to: Preparing for an appointment: one page, three questions Replied, post #47 · Clinical › Prescriber conversations · 25 Jul 2026 · 7 likes Where you have a specific worry, name it. "I am worried about X" is more useful to a clinician than a series of questions circling X.
Request: a per-category review queue Replied, post #128 · Meta › Feature requests · 24 Jul 2026 · 0 likes This is the answer, and the reason it is the answer is the more useful part.
Which categories are strict and which are relaxed, honestly Replied, post #27 · Start Here › Welcome · 18 Jul 2026 · 12 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…
Semaglutide and gastric emptying — the mechanism behind most of the side-effect profile Replied, post #103 · Compounds › Semaglutide · 13 Jul 2026 · 16 likes Nausea is dose-related and adaptation-related, and both are true at once. The pattern most people describe is a return of symptoms at each escalation followed by…
Follow-up: How compounding permissions changed when supply normalised Replied, post #7 · Sourcing › Regulatory · 10 Jul 2026 · 14 likes I disagree with the framing of compounding permissions above, and I think it is a substantive disagreement rather than a terminological one. Setting out why, so it can…
Revisiting: Journal club: SURMOUNT-OSA and a hard endpoint in a soft field Replied, post #90 · Evidence › Journal club · 8 Jul 2026 · 9 likes An honest declaration on SURMOUNT-OSA: I have a prior here and it is strong enough that you should weight what I say downward. Stating it rather than hiding it.
Trust level 3 requirements: a clarification — does this still hold? Replied, post #78 · Meta › Announcements · 7 Jul 2026 · 17 likes Trust level 3 requirements 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.
How shortages have affected compounding permissions Replied, post #7 · Access › Shortages · 30 Jun 2026 · 0 likes Stockpiling in response to a shortage worsens it, which is true and is a poor argument to make to somebody who has run out. I would rather say I do not know than round…
Stepping down deliberately, and how to do it without losing progress — what changed since Replied, post #23 · Practice › Dosing & titration · 28 Jun 2026 · 3 likes Concentration and dose get conflated constantly in this subcategory. Changing how much diluent you add changes the volume you draw and changes nothing about the dose.…
Revisiting: The report format the maintainers ask for, and why each field is there Replied, post #88 · Sourcing › Vendor reports · 21 Jun 2026 · 0 likes This is the sort of exchange that makes the archive worth searching.
Journal club: STEP 1 and the treatment-policy estimand — does this still hold? Replied, post #45 · Evidence › Journal club · 19 Jun 2026 · 20 likes The most common failure mode is spending fifty minutes on the effect size and ten on the population. Reversing that ratio would improve most sessions. It is the kind of…
Carryover and the ghost peak from last week's standard — what changed since Replied, post #30 · Analytics › HPLC & UHPLC · 13 Jun 2026 · 20 likes Source for the Carryover 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…
Second pass at: Sleep apnoea improving and the equipment implications Replied, post #57 · Wellbeing › Sleep · 12 Jun 2026 · 4 likes Right — I had this wrong and I am glad to have read it before it mattered.
Bariatric surgery history: altered anatomy, altered expectations Replied, post #20 · Clinical › Special populations · 22 May 2026 · 0 likes Body weight at the extremes of the studied range affects exposure and the trials rarely reported enough to say by how much.
Follow-up: Sleep quality changes during weight loss Replied, post #27 · Wellbeing › Sleep · 21 May 2026 · 0 likes Apnoea monitoring: if you have diagnosed or suspected sleep apnoea, periodic monitoring (annually) during weight loss is prudent because severity changes.
What TRIUMPH is designed to answer, and why we should not pre-empt it — does this still… Replied, post #23 · Compounds › Retatrutide · 13 May 2026 · 3 likes Taking post #20 at face value and following it one step further. I changed my mind about TRIUMPH after someone here asked me for the source and I could not produce one.…
Follow-up: Reconciling a label claim with a content assay Replied, post #14 · Analytics › COA interpretation · 10 Apr 2026 · 18 likes I had written a reply contradicting post #12 and deleted it. Here is what survived. I disagree with the framing of Reconciling a label claim above, and I think it is a…
Five questions in one post gets you one answer — how to split them Replied, post #47 · Start Here › How to Ask · 4 Apr 2026 · 10 likes A photograph of a vial is rarely useful and a photograph of a document usually is. Redact the identifiers before you post either. This is the version I would want a new…
Amylin receptor signalling and satiety — what changed since Replied, post #51 · Pharmacology › Receptor biology · 26 Mar 2026 · 0 likes Clear enough that I do not think I have a follow-up, which is unusual.
Run-in periods and the population they select — the long version Replied, post #3 · Evidence › Trials · 25 Mar 2026 · 3 likes Where I part company with the opening post, and it is a narrow parting. Entry criteria, run-in periods and the self-selection of people willing to enter a multi-year…
A 10 mg vial reconstituted three different ways, compared Replied, post #10 · Practice › Reconstitution · 21 Mar 2026 · 8 likes Write the reconstitution date and the concentration on the vial. Not on a note, on the vial. Every account here of a dosing error involving the wrong concentration…
Rotating between abdomen, thigh and upper arm: absorption differences — one year on Replied, post #34 · Practice › Administration · 18 Mar 2026 · 16 likes Where I would push back on the Rotating between abdomen consensus is the confidence, not the direction. The direction looks right. The confidence is borrowed.
Introducing myself: pharmacist, sceptic, reluctant participant — one year on Replied, post #66 · Lounge › Introductions · 14 Mar 2026 · 23 likes No disagreement from me. Posting only so the question does not look ignored.
Revisiting: Absolute versus relative contraindications Replied, post #41 · Safety › Contraindications · 11 Mar 2026 · 7 likes Absolute versus relative contraindications is worth one more sentence than it usually gets, and the sentence is the one about how the number was arrived at.
Measurement error in home scales, with a worked standard deviation — the long version Replied, post #30 · Research Methods › Statistics · 11 Feb 2026 · 1 like I think the Measurement error in home scales question is answerable and has not been answered, which is a more optimistic position than most of this thread.
Half-life, steady state, and accumulation worked through — a second dataset Replied, post #56 · Pharmacology › Pharmacokinetics · 10 Jan 2026 · 30 likes That matches what I have seen, for whatever a single anecdote is worth.
Promotion criteria, and the one that stops most nominations — the long version Replied, post #126 · Documentation › Doc review · 5 Jan 2026 · 6 likes Review of promoted topics: when a topic is nominated for promotion to a maintained documentation page, the draft is posted here. Community review happens before…
Documentation that appears only after payment Replied, post #97 · Sourcing › Red flags · 5 Dec 2025 · 27 likes Following this. I have the same question and no better information than the first post.
Reading SURMOUNT-1 without the press release — one year on Replied, post #27 · Compounds › Tirzepatide · 5 Dec 2025 · 9 likes Adding a null result on Reading SURMOUNT-1 without the press. I looked, carefully, and found nothing, and null results deserve posting precisely because they never are.
Heterogeneity as information rather than as a nuisance Replied, post #11 · Evidence › Meta-analyses · 29 Nov 2025 · 0 likes On heterogeneity: 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…
Second pass at: The topic list is dense — is that deliberate? Replied, post #7 · Meta › Site feedback · 24 Nov 2025 · 27 likes I had written a reply contradicting post #6 and deleted it. Here is what survived. Performance: if pages are slow to load, timeouts occur, or the site is unresponsive,…
Revisiting: Aggregates and why a purity assay may miss them entirely Replied, post #14 · Analytics › Impurities & related substances · 16 Nov 2025 · 17 likes Post #12 is the version of this I will quote in future. One addition. The version of Aggregates that circulates here is a simplification of a simplification. It is not…
[2026 update] What steady state means for the decision to escalate Replied, post #57 · Practice › Dosing & titration · 11 Nov 2025 · 6 likes Nothing to add on the substance. Thank you for taking the question at face value.
Warfarin and altered intake: the monitoring argument — the long version Replied, post #46 · Practice › Interactions · 8 Nov 2025 · 6 likes Anticoagulant questions come up regularly and are the clearest case for professional advice rather than discussion, because the consequence of being wrong is not…
A calculator that gives a right answer to the wrong question — does this still hold? Replied, post #23 · Data & Tools › Calculators · 2 Nov 2025 · 0 likes Post #21 describes the usual case. This is about the unusual one. Dead volume is the input most calculators do not have, which is why their answer and the delivered…
Documentation that materially improves an appeal's chances Replied, post #30 · Access › Insurance & coverage · 16 Oct 2025 · 0 likes Templates in the documentation set are deliberately dull because dullness is what works in this context.
The most useful thing you learned here that was not the answer you came for — a second… Replied, post #90 · Lounge › Off topic · 11 Oct 2025 · 0 likes Humour: light, relevant humour is welcome. Cruel humour targeting individuals or groups is not.
An orphaned page with no inbound links — the long version Replied, post #4 · Meta › Wiki maintenance · 8 Oct 2025 · 8 likes Post #2 put the caveat in the right place and I want to underline it. That matches how I use it. The general statement is what you check afterwards, not what you arrive…
Sleep quality changes during weight loss — what changed since Replied, post #17 · Wellbeing › Sleep · 5 Oct 2025 · 11 likes This follows post #14 rather than contradicting it. Consistency of timing does more for most people's sleep than any intervention discussed in this subcategory. Take…
The nausea timeline across the first four weeks, with a tabulated log Replied, post #69 · Practice › Side effects · 17 Sep 2025 · 11 likes The published rates come from populations that were titrated on a defined schedule with clinical supervision. Rates from a forum are not comparable and are biased by…
The nausea timeline across the first four weeks, with a tabulated log — what changed since Replied, post #8 · Practice › Side effects · 15 Sep 2025 · 0 likes Everything in post #4 holds. The case it does not cover is the one I have. A symptom that starts weeks after a dose has been stable is a different observation from one…
Coming back to: What published stability data actually covers, and what it does not Replied, post #115 · Practice › Storage & stability · 17 Aug 2025 · 22 likes Post #112 describes the usual case. This is about the unusual one. Clarity is a weak test. A solution can lose a significant fraction of its active content to…
A request that was declined, and the reasoning — a second dataset Replied, post #75 · Documentation › Wiki requests · 13 Aug 2025 · 12 likes Confirming post #73 from a second method, which matters more than confirming it from a second person. Scope the request narrowly. A page about one thing gets written…
Gauge and length selection for subcutaneous injection Replied, post #19 · Devices › Syringes & needles · 10 Aug 2025 · 1 like Two questions I would want answered before drawing anything from the gauge and length selection data above: how were the cases selected, and what happened to the ones…
Aggregated purity results across four services, with caveats Replied, post #2 · Data & Tools › Datasets · 26 Jun 2025 · 0 likes Combining results from different testing services into one column loses information that matters. Keep the service as a field. I would rather be precise about what I do…
Revisiting: Why a compound being unapproved is not the same as being illegal to possess Replied, post #34 · Sourcing › Regulatory · 25 Jun 2025 · 0 likes Adding the measurement that post #33 says would settle it. Preclinical versus clinical: compounds with strong preclinical data can fail in clinical trials. Compounds…
Sodium, potassium and magnesium when intake drops Replied, post #28 · Nutrition & Training › Hydration & electrolytes · 24 Jun 2025 · 0 likes Orthostatic symptoms: dizziness on standing after lying down can indicate dehydration or electrolyte depletion. Increasing fluids, salt, and potassium usually resolves…
Second pass at: Trial registration and comparing the protocol with the paper Replied, post #27 · Evidence › Trials · 11 Jun 2025 · 2 likes Post #26 answers the question as asked. The question underneath it is different. Subgroup analyses are hypothesis-generating unless pre-specified and adequately…
[2026 update] An appeal that failed, and what I would do differently Replied, post #48 · Access › Insurance & coverage · 10 Jun 2025 · 15 likes Post #46 put the caveat in the right place and I want to underline it. On appeal: the maintained page in the documentation commons covers the general case with…
What SELECT changed about how semaglutide is discussed, and what it did not Replied, post #126 · Compounds › Semaglutide · 20 May 2025 · 0 likes Agreed on all of that, and I have nothing to add to it.
Journal club: SURMOUNT-4 and continuation versus withdrawal — a second dataset Replied, post #23 · Evidence › Journal club · 28 Apr 2025 · 4 likes Building on post #22 rather than restating it. SURMOUNT-1 (N Engl J Med 2022): Tirzepatide obesity trial. The largest mean weight reduction for a pharmacological…
Journal club: STEP 1 and the treatment-policy estimand — does this still hold? Replied, post #128 · Evidence › Journal club · 23 Apr 2025 · 15 likes Saving this. It is the version I will quote when the question comes round again.
Counter-ion content and its effect on measured mass Replied, post #21 · Analytics › Mass spectrometry · 20 Apr 2025 · 0 likes Taking post #20 at face value and following it one step further. Positional isomers and epimers are mass-identical. Any argument that a mass result rules them out is…
The C-cell question: rodent findings and their human context Replied, post #8 · Compounds › Semaglutide · 16 Apr 2025 · 19 likes A methods point on c-cell question rather than a substantive one: if the comparison is not like for like, the difference you are measuring is the difference in method.
Follow-up: Open-label extensions: what survives and what does not Replied, post #26 · Evidence › Trials · 5 Apr 2025 · 6 likes Post #23 answers the question as asked. The question underneath it is different. Absolute and relative effects answer different questions. Write down the event rate in…
Maintainer handover: how it works Replied, post #83 · Meta › Wiki maintenance · 19 Mar 2025 · 2 likes On maintainer handover, the part that usually goes wrong is that the question is asked as though it has one answer. It has a range, and the width of the range is the…
Pharmaceutical compounding rules, summarised from primary sources Replied, post #45 · Sourcing › Regulatory · 1 Mar 2025 · 8 likes This settles it for me, at least until somebody posts a reason it should not.
Follow-up: Tesamorelin has an approved indication — what that changes about the evidence Replied, post #16 · Compounds › Secretagogues & GH axis · 26 Feb 2025 · 30 likes Post #13 is right about the mechanism and I think understates the practical bit. Reading a rodent study on a secretagogue without over-extrapolating: rodent studies can…
Biased agonism: a real phenomenon, an over-used explanation — what changed since Replied, post #45 · Pharmacology › Receptor biology · 7 Feb 2025 · 20 likes GLP-1 receptor agonism produces its metabolic effects through more than one route: central satiety signalling, delayed gastric emptying, and glucose-dependent insulin…
Consistent declarations and why they matter more than clever ones Replied, post #5 · Sourcing › Logistics · 7 Feb 2025 · 23 likes Anyone deciding whether a delay is a problem should ask what would change if they waited another week. Usually the answer is nothing. The mechanism is plausible, which…
Distinguishing a deletion sequence by mass alone Replied, post #29 · Analytics › Mass spectrometry · 29 Jan 2025 · 10 likes Trifluoroacetate adducts are common in material purified with TFA and are one reason a mass spectrum from a peptide can look busier than expected. One of those cases…
Recovery when intake is low: what to cut first Replied, post #53 · Nutrition & Training › Resistance training · 13 Jan 2025 · 15 likes Taking post #50 at face value and following it one step further. Recovery: I have looked for the primary source twice and failed twice. Either it does not exist or it…
Scheduled maintenance and what will be unavailable Replied, post #11 · Meta › Announcements · 9 Jan 2025 · 22 likes The arithmetic in post #10 is right; the assumption feeding it is the part to check. Worth saying publicly: stepping back cleanly and handing over is a service.…
Oxidation pathways for methionine and tryptophan Replied, post #62 · Analytics › Impurities & related substances · 31 Dec 2024 · 5 likes Coming back to post #60, because the follow-up matters more than the original answer. Dimer and higher-order multimers: two or more peptide molecules bonded together.…
Body image changing more slowly than the body Replied, post #53 · Wellbeing › Mental health · 17 Dec 2024 · 1 like Relationship with food changing is one of the most commonly described experiences here and is discussed far less than the physical effects. I am confident about the…
[2026 update] Step therapy requirements and how to satisfy them Replied, post #52 · Access › Insurance & coverage · 3 Dec 2024 · 2 likes I had written a reply contradicting post #48 and deleted it. Here is what survived. Adding a reference point for Step therapy requirements. Mine is a single case,…
Follow-up: Escalating every six weeks instead of four: what I observed over eight months Replied, post #4 · Practice › Dosing & titration · 25 Nov 2024 · 20 likes Narrowing post #3, because the general version has more than one answer. If symptoms reset at each step, that is the expected pattern rather than a sign that the…
Revisiting: Melanocortin agonists: mechanism and the documented adverse profile Replied, post #60 · Compounds › Other compounds · 19 Oct 2024 · 0 likes Taking post #57 at face value and following it one step further. The reason Melanocortin agonists is hard to answer is that the obvious measurement and the relevant…
Why a preprint's supplementary material is often the best part Replied, post #28 · Evidence › Preprints · 18 Sep 2024 · 11 likes Confirming post #25 from a second method, which matters more than confirming it from a second person. Retractions and corrections do not propagate well from preprint…
Transit times by route, from a logged dataset — the long version Replied, post #10 · Sourcing › Logistics · 5 Sep 2024 · 6 likes Documentation correct at first presentation is the actual explanation for a transit time that otherwise looks optimistic.
Correlation in a self-tracked dataset: what it can support Replied, post #4 · Research Methods › Statistics · 19 Aug 2024 · 10 likes Following this. I have the same question and no better information than the first post.
Identical chromatograms across two different lots Replied, post #15 · Sourcing › Red flags · 15 Aug 2024 · 29 likes The confident answers on identical chromatograms and the well-sourced answers are not the same answers, which is the most useful thing I have learned reading this…