m.ferrand
TL1 Member · Geneva, CH
New member with a chemistry degree and no clinical experience whatsoever.
Joined 23 April 2025 · last posted 5d
30 posts, newest first. Showing up to 150.
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Revisiting: The best-written scientific paper you have read Replied, post #111 · Lounge › Off topic · 23 Jul 2026 · 15 likes That is the distinction I keep failing to hold on to. Written down now.
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Coming back to: Time to steady state after a dose increase Replied, post #106 · Pharmacology › Pharmacokinetics · 20 Jul 2026 · 32 likes Coming back to post #102, because the follow-up matters more than the original answer. The accumulation ratio for weekly dosing with a week-long half-life is around…
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Why the Start Here categories exist, and what they are not for Replied, post #4 · Start Here › Welcome · 16 Jul 2026 · 0 likes One more thing on Start that took me far too long to see: the two figures people quote are not measuring the same quantity. Once you notice that, the apparent…
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Osteoarthritis and mechanical versus metabolic improvement — one year on Replied, post #50 · Clinical › Comorbidities · 13 Jul 2026 · 1 like Everything in post #49 holds. The case it does not cover is the one I have. Since Osteoarthritis and mechanical versus metabolic keeps coming up, it should probably be…
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Private prescribing in the UK: what is actually involved Replied, post #48 · Regional › UK & Ireland · 26 Jun 2026 · 17 likes Worth separating two things that post #45 runs together. The failure mode on private prescribing is boring rather than dramatic. It is almost always the step everyone…
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Reused chromatograms across lots: how to spot it Replied, post #51 · Analytics › COA interpretation · 21 Jun 2026 · 1 like I read post #47 twice before replying, because I had assumed the opposite. The honest answer on reused chromatograms across lots is that it depends, and the useful part…
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[2026 update] Travelling with an injectable: documentation and practicalities Replied, post #23 · Access › International · 19 Jun 2026 · 19 likes Nothing here is legal advice, and in this subcategory that caveat is doing real work rather than sitting decoratively at the end. Marking that as an opinion rather than…
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Second pass at: Leak-back after withdrawal and whether you lost a meaningful dose Replied, post #19 · Practice › Administration · 12 Jun 2026 · 0 likes If you have to inject at a different time of day than usual, that is a much smaller perturbation than it feels for a weekly compound with a week-long half-life.…
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Tracking intake honestly when appetite is absent Replied, post #45 · Nutrition & Training › Protein & intake · 2 Jun 2026 · 0 likes Nothing here is medical or dietetic advice, and a dietitian is the professional this subcategory most often recommends.
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Peak-to-trough ratio at steady state for a weekly agent Replied, post #18 · Pharmacology › Pharmacokinetics · 31 May 2026 · 2 likes Area under the curve is the exposure measure that matters for most effects in this class. Peak concentration matters more for tolerability. If that reads as pedantic,…
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[2026 update] A vial that will not fully dissolve: what to check and in what order Replied, post #75 · Practice › Reconstitution · 27 May 2026 · 10 likes A vial that will not fully dissolve: check in order: is the diluent genuinely room temperature (some preservatives crystallise in cold), is the vial being warmed gently…
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Review: a draft on reconstitution arithmetic, with objections — one year on Replied, post #17 · Documentation › Doc review · 24 May 2026 · 1 like I think the draft on reconstitution arithmetic question is answerable and has not been answered, which is a more optimistic position than most of this thread.
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0.3 mL versus 0.5 mL versus 1 mL barrels: resolution matters Replied, post #49 · Devices › Syringes & needles · 23 May 2026 · 1 like Where I part company with post #45, and it is a narrow parting. U-100 means the barrel is graduated for a solution containing one hundred units of insulin per…
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Revisiting: The best-written scientific paper you have read Started this topic · Lounge › Off topic · 23 May 2026 · 2 likes Posting this under the heading it deserves: Revisiting: The best-written scientific paper you have read Everything below is what sits behind that. Asking about…
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Second pass at: Absence of evidence and evidence of absence Replied, post #2 · Research Methods › Statistics · 11 May 2026 · 19 likes Counterpoint on Absence of evidence, offered without confidence: the same observation is consistent with a much duller explanation, and nobody has ruled the dull one out.
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Contributing data without breaching anyone's privacy Replied, post #2 · Data & Tools › Datasets · 2 Mar 2026 · 0 likes The opening post is the version of this I will quote in future. One addition. Reproducibility: if sharing data, include enough context (compound, dose, timeframe,…
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Measurement error in a self-reported exposure Replied, post #34 · Evidence › Study critique · 23 Feb 2026 · 14 likes Picking up post #32: that is the part I would want checked first. I have been on both sides of the measurement error argument in this category within eighteen months,…
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Reading an interaction checker output critically Replied, post #119 · Practice › Interactions · 14 Feb 2026 · 0 likes Where a published interaction study exists it usually reports an area-under-curve ratio, and that number is far more informative than a yes-or-no answer. I looked this…
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Non-inferiority margins: how they are chosen and how they are abused — a second dataset Replied, post #28 · Evidence › Trials · 13 Feb 2026 · 8 likes Adding a data point of agreement rather than a data point.
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Temperature loggers worth the money — the long version Replied, post #107 · Devices › Cold chain · 5 Jan 2026 · 2 likes The bit of Temperature loggers worth the money that nobody enjoys is that the answer changes depending on what you are trying to decide with it. Say what the decision…
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Pen dose counters: what a click does and does not guarantee Replied, post #102 · Devices › Pens & autoinjectors · 19 Nov 2025 · 0 likes Nothing here is medical advice, and pen technique is the single easiest thing to have demonstrated in person rather than learned from a description. Where I would look…
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Older adults, sarcopenia risk, and the trade-off nobody quantifies — the long version Replied, post #50 · Clinical › Special populations · 12 Nov 2025 · 17 likes Post #48 answers the question as asked. The question underneath it is different. Adolescents: a distinct evidence base exists. The compounds are not approved for…
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Sleep tracking data and its considerable limitations Replied, post #111 · Wellbeing › Sleep · 28 Oct 2025 · 20 likes Gastrointestinal effects overnight: nausea or reflux or constipation at night can disrupt sleep. Dosing timing (morning versus evening) might help if nighttime GI…
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A ten-fold dose error caught before injection Replied, post #88 · Devices › Syringes & needles · 25 Aug 2025 · 0 likes Needle length for subcutaneous delivery is a question about tissue depth and injection angle together. Short needles at ninety degrees and longer ones at an angle reach…
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Airline travel with a temperature-sensitive injectable — what changed since Replied, post #60 · Devices › Cold chain · 7 Aug 2025 · 22 likes My experience of Airline travel contradicts the reply above. I am posting it as a data point rather than as a refutation, because one person's experience is exactly that.
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How to research a compound with no human data without deceiving yourself Replied, post #3 · Compounds › Other compounds · 29 Jul 2025 · 3 likes Narrowing post #2, because the general version has more than one answer. For any compound without a widely available reference standard, retention-time comparisons…
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The CagriSema phase 2 paper and what a fixed combination buys Replied, post #65 · Compounds › Cagrilintide & amylin analogues · 6 Jul 2025 · 1 like Taking post #63 at face value and following it one step further. Something worth flagging about cagrisema phase 2 paper: the strongest-sounding claims in this thread…
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Second pass at: How to research a compound with no human data without deceiving yourself Replied, post #32 · Compounds › Other compounds · 17 Mar 2025 · 32 likes Research use only, not approved for human use, and in this subcategory the compounds vary enormously in how much is known about them. It is worth establishing which end…
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Coming back to: When to suspect the method rather than the sample Replied, post #74 · Analytics › Method validation · 14 Dec 2024 · 26 likes Robustness: the method gives consistent results when minor parameters vary. Tested by deliberately varying pH, temperature, flow rate, and mobile phase composition…
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Blind submission and why it changes minds Replied, post #9 · Sourcing › Independent verification · 4 Jul 2024 · 1 like Grateful for the specificity. Vague answers to this question are what sent me looking.