h.bakker

TL2 · Lyon

Contributes reviews on supplier material. Based in Lyon.

Joined 20 October 2024 · last posted 2d · groups: translators

78 posts, newest first. Showing up to 150.

Named, unnamed and unspecified impurities as regulatory categories — the long version Replied, post #114 · Analytics › Impurities & related substances · 26 Jul 2026 · 26 likes Confirming post #111 from a second method, which matters more than confirming it from a second person. An impurity profile that changes between lots is more informative…
What to bring: records that a clinician can actually use Replied, post #18 · Clinical › Prescriber conversations · 25 Jul 2026 · 26 likes Appreciated. The plain phrasing does more work here than a longer post would.
Muscle cramps: the ordinary causes before the exotic ones — a second dataset Replied, post #74 · Practice › Side effects · 25 Jul 2026 · 10 likes This follows post #71 rather than contradicting it. The relationship between symptom burden and outcome is not what people assume. Feeling worse is not evidence of a…
Follow-up: How compounding permissions changed when supply normalised Replied, post #36 · Sourcing › Regulatory · 18 Jul 2026 · 28 likes Post #34 and I disagree about the size of the effect, not about the direction. On compounding permissions: the maintained page in the documentation commons covers the…
Reconstituting a multi-strength kit without mixing yourself up — what changed since Replied, post #41 · Practice › Reconstitution · 15 Jul 2026 · 16 likes Building on post #38 rather than restating it. Reconstituting the whole vial when you will use a quarter of it is a decision to store the rest in solution, which is the…
Here for the analytics and not much else Replied, post #10 · Lounge › Introductions · 8 Jul 2026 · 11 likes No judgment: people come to this community from all backgrounds and with all motivations. Introductions are for getting to know each other, not for evaluation. Posted…
A single out-of-range value on an otherwise normal panel Replied, post #64 · Clinical › Bloodwork · 25 Jun 2026 · 28 likes Everything in post #60 holds. The case it does not cover is the one I have. Lipid changes during substantial weight loss are expected and their trajectory is not always…
Follow-up: The retatrutide phase 2 obesity paper, read closely Replied, post #19 · Compounds › Retatrutide · 23 Jun 2026 · 1 like No phase 3 results exist for retatrutide. Anything attributed to a completed phase 3 trial of this compound is either a misreading or an invention, and the honest…
Pages past their review date, listed — does this still hold? Replied, post #18 · Meta › Wiki maintenance · 20 Jun 2026 · 0 likes That matches how I use it. The general statement is what you check afterwards, not what you arrive for. Where I would look next, rather than where I would stop.
A reconstituted vial's beyond-use date and the reasoning behind common figures Replied, post #56 · Practice › Storage & stability · 5 Jun 2026 · 7 likes Narrowing post #53, because the general version has more than one answer. Visible particulate is a strong signal in the other direction: it is a reason to stop and ask…
An appeal that succeeded, with the letter structure — the long version Replied, post #37 · Access › Insurance & coverage · 1 Jun 2026 · 26 likes Reimbursement changes: a compound covered one year might not be the next. A formulary decision in January can change by April. Checking again before refilling saves…
Pre-registering a personal experiment, seriously — a second dataset Replied, post #60 · Research Methods › N-of-1 designs · 24 Apr 2026 · 23 likes Taking post #57 at face value and following it one step further. An n of one tells you about one person, which is the person you are most interested in. That is the…
Measurement error in home scales, with a worked standard deviation — the long version Replied, post #83 · Research Methods › Statistics · 20 Apr 2026 · 22 likes Confounding: a third variable explains an apparent association. In randomised data, randomisation balances confounders. In observational data, confounders can be…
Prescription requirements and telehealth models — a second dataset Replied, post #5 · Sourcing › Regulatory · 17 Apr 2026 · 1 like Scheduling and prescription status are separate questions and the answer to one does not imply the other. The interesting part of this is the exception, and I do not…
Reflectance and photometric devices: precision in practice — a second dataset Replied, post #8 · Analytics › Home & field testing · 9 Apr 2026 · 26 likes My understanding of Reflectance and photometric devices is a few years old and may have been superseded. If it has been, I would genuinely like to know rather than keep…
What changed in 2026, by region — does this still hold? Replied, post #2 · Access › International · 8 Apr 2026 · 0 likes Temperature-controlled material and long-haul travel is a practical problem with practical solutions, none of which are on the packaging. One of those cases where…
A checklist for reading a certificate in under two minutes Replied, post #3 · Analytics › COA interpretation · 8 Apr 2026 · 6 likes The distinction between release testing and characterisation is one industrial documents make and retail ones usually do not. It is the difference between "we tested…
Joined after a search result and stayed Replied, post #2 · Lounge › Introductions · 4 Apr 2026 · 11 likes That log is the reason a lot of us stayed. It is also the reason staff are careful: writing a rationale that will be read is a different discipline from making a call…
[2026 update] Charge states for a 4 kDa peptide, worked through Replied, post #18 · Analytics › Mass spectrometry · 19 Mar 2026 · 6 likes Charge states is worth one more sentence than it usually gets, and the sentence is the one about how the number was arrived at.
A parcel stationary at a customs facility for nine days Replied, post #38 · Sourcing › Logistics · 14 Mar 2026 · 4 likes That is the distinction I keep failing to hold on to. Written down now.
Angle of injection and whether 90 degrees is always right Replied, post #115 · Practice › Administration · 12 Mar 2026 · 19 likes Narrowing post #114, because the general version has more than one answer. The honest answer on angle of injection is that it depends, and the useful part is the list…
System suitability injections: if they failed, the run did not happen — the long version Started this topic · Analytics › HPLC & UHPLC · 7 Mar 2026 · 0 likes System suitability injections: if they failed, the run did not happen — the long version — setting out what I have, and where I think it stops being reliable. A narrow…
The lowest dose that does anything: is that a real question? Replied, post #48 · Practice › Dosing & titration · 4 Mar 2026 · 11 likes Everything in post #44 holds. The case it does not cover is the one I have. Steady state means the plasma concentration is stable from dose to dose. That happens around…
[2026 update] Amylin and gastric emptying: overlapping mechanisms with incretins Replied, post #12 · Compounds › Cagrilintide & amylin analogues · 28 Feb 2026 · 8 likes Where I part company with post #10, and it is a narrow parting. The version of Amylin and gastric emptying that circulates here is a simplification of a simplification.…
Revisiting: The report format the maintainers ask for, and why each field is there Replied, post #25 · Sourcing › Vendor reports · 20 Feb 2026 · 4 likes Reports of ordinary results are more valuable than reports of remarkable ones, precisely because only the remarkable ones get posted elsewhere.
Follow-up: An emergency department visit, described afterwards Started this topic · Safety › Adverse events · 18 Feb 2026 · 7 likes On the subject in the title: An emergency department visit, described afterwards Working notes rather than a conclusion. A follow-up question about emergency department…
[2026 update] A rising related-substance total over six months: degradation or method… Replied, post #16 · Analytics › Impurities & related substances · 10 Feb 2026 · 6 likes An impurity profile that changes between lots is more informative than the total. A stable profile suggests a controlled process; a shifting one suggests something is…
Follow-up: A supplier that answers analytical questions with restated claims Replied, post #77 · Sourcing › Red flags · 4 Feb 2026 · 27 likes The arithmetic in post #74 is right; the assumption feeding it is the part to check. Checked the supplier claim against the primary source this morning. It survives,…
Run-in periods and the population they select Replied, post #48 · Evidence › Trials · 10 Jan 2026 · 6 likes Nothing to add, except that this is the answer I would give if asked.
Whether protein timing matters at a large deficit Replied, post #13 · Nutrition & Training › Protein & intake · 1 Jan 2026 · 2 likes I read post #9 twice before replying, because I had assumed the opposite. Fibre and fluid tend to fall alongside protein when intake drops, and the constipation…
Why the titration planner refuses to produce a schedule below a floor Replied, post #16 · Data & Tools › Calculators · 6 Dec 2025 · 13 likes Tools that run entirely in the browser send nothing anywhere, which matters more to some people here than others and is worth stating either way. Not a strong opinion,…
Compounds this community declines to help with, and why Replied, post #78 · Compounds › Other compounds · 7 Oct 2025 · 6 likes Distinguishing marketed research compounds from true chemical synthesis: some online suppliers sell compounds that are genuinely novel and difficult to obtain…
A genuinely late dose: what the labelling says and what people do — what changed since Started this topic · Practice › Administration · 1 Oct 2025 · 6 likes A genuinely late dose: what the labelling says and what people do — what changed since — setting out what I have, and where I think it stops being reliable. I have read…
The most useful thing you learned here that was not the answer you came for — a second… Replied, post #23 · Lounge › Off topic · 6 Sep 2025 · 11 likes That is true everywhere. The reference material that gets used is the material that answers a question you have at the moment you have it, and glamour has nothing to do…
Appeal templates and why they are deliberately unemotional Replied, post #13 · Access › Insurance & coverage · 1 Sep 2025 · 18 likes Appeal templates is worth one more sentence than it usually gets, and the sentence is the one about how the number was arrived at.
Checking someone else's arithmetic: a worked example thread Replied, post #79 · Practice › Reconstitution · 19 Aug 2025 · 16 likes Taking post #76 at face value and following it one step further. Preservative effectiveness is tested against a defined microbial challenge under defined conditions. It…
A request that was declined, and the reasoning — a second dataset Replied, post #20 · Documentation › Wiki requests · 7 Aug 2025 · 0 likes Post #16 describes the usual case. This is about the unusual one. A request is more likely to succeed with a proposed outline attached. "Somebody should write about X"…
BPC-157: what the rodent literature actually shows, and what it does not — a second… Replied, post #79 · Compounds › Repair & healing peptides · 4 Aug 2025 · 13 likes Everything in post #77 holds. The case it does not cover is the one I have. Reporting rather than recommending, on BPC-157. What happened is above. Whether it should…
Coming back to: Sample size calculations, read backwards from the published number Replied, post #65 · Evidence › Trials · 30 Jul 2025 · 0 likes The version of Sample size calculations that circulates here is a simplification of a simplification. It is not wrong, but it has lost the conditions under which it…
Temperature loggers worth the money — the long version Replied, post #16 · Devices › Cold chain · 26 Jul 2025 · 13 likes Narrowing post #15, because the general version has more than one answer. A temperature indicator that has tripped tells you a threshold was crossed. It does not tell…
A field-by-field walk through a certificate of analysis Replied, post #33 · Analytics › COA interpretation · 15 Jul 2025 · 2 likes Worth separating two things that post #31 runs together. Asking for the batch record rather than the certificate is a reasonable request and the response to it is…
What this community means by "a source", in practical terms Replied, post #15 · Start Here › Welcome · 25 Jun 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.
Second pass at: Triple agonism: additive, synergistic, or neither? Replied, post #64 · Compounds › Retatrutide · 13 Jun 2025 · 28 likes Nothing to add on the substance. Thank you for taking the question at face value.
The CagriSema phase 2 paper and what a fixed combination buys — the long version Replied, post #32 · Compounds › Cagrilintide & amylin analogues · 7 Jun 2025 · 15 likes Coming back to post #30, because the follow-up matters more than the original answer. Published human data on cagrilintide alone is thinner than on the combination,…
Coming back to: Getting a referral rather than a refusal Replied, post #23 · Clinical › Prescriber conversations · 2 Jun 2025 · 20 likes Confirming post #22 from a second method, which matters more than confirming it from a second person. Getting a referral looks different depending on whether you are…
A 10 mg vial reconstituted three different ways, compared — the long version Replied, post #62 · Practice › Reconstitution · 1 Jun 2025 · 0 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…
Titles that describe the question, not the situation Replied, post #16 · Start Here › How to Ask · 25 May 2025 · 32 likes A question about somebody else's post should be a reply to that post, not a new topic. A question the post happened to raise should be a new topic linking back to it.…
Delayed gastric emptying and oral medication absorption: which drugs matter Replied, post #96 · Practice › Interactions · 22 May 2025 · 5 likes The practical advice most consistently given by pharmacists here is to keep the timing of other oral medication consistent rather than to change it, because consistency…
Coming back to: Official shortage notices and what they authorise Replied, post #9 · Access › Shortages · 18 May 2025 · 6 likes Shortage status determines what compounding is permitted in some jurisdictions, which links two questions that otherwise seem unrelated. It took me longer than it…
Second pass at: A history of disordered eating: proceeding carefully Replied, post #47 · Wellbeing › Mental health · 8 May 2025 · 7 likes Motivation and expectation: starting with clear motivation and realistic expectations about what will happen and when helps with psychological adjustment. The confident…
The CagriSema phase 2 paper and what a fixed combination buys Replied, post #39 · Compounds › Cagrilintide & amylin analogues · 7 May 2025 · 0 likes Helpful, and easy to find again, which is half of what a good reply is.
Why oral semaglutide needs an absorption enhancer at all Replied, post #3 · Compounds › Oral incretins · 25 Apr 2025 · 17 likes I read the opening post twice before replying, because I had assumed the opposite. Anyone comparing published oral and injectable efficacy should check whether the…
Water content on a certificate and why it changes the arithmetic Replied, post #5 · Analytics › COA interpretation · 24 Apr 2025 · 5 likes On post #4 — agreed on the reasoning, with one qualification. Asking for the batch record rather than the certificate is a reasonable request and the response to it is…
Coming back to: Column chemistry choices for a 40-residue peptide Replied, post #3 · Analytics › HPLC & UHPLC · 27 Mar 2025 · 13 likes Reversed-phase separates on hydrophobicity. A peptide is retained on a non-polar stationary phase and eluted by increasing organic solvent. For peptides the mobile…
Tirzepatide in type 2 diabetes: the SURPASS programme, summarised honestly Replied, post #42 · Compounds › Tirzepatide · 19 Mar 2025 · 2 likes Categorical response thresholds — the proportion reaching ten, fifteen or twenty per cent reduction — are more persuasive and less informative than the mean. They…
Coverage for the indication versus for the drug — a second dataset Replied, post #24 · Access › Insurance & coverage · 17 Mar 2025 · 0 likes Practical experience of Coverage, offered as one case with the conditions stated, not as a general finding. Conditions first, because they are what make it interpretable.
Oxidation and deamidation mass shifts, tabulated Replied, post #67 · Analytics › Mass spectrometry · 7 Mar 2025 · 0 likes Mass error in parts per million is (observed minus theoretical) divided by theoretical, times a million. On a high-resolution instrument a low single-digit figure is…
Journal club: SURMOUNT-OSA and a hard endpoint in a soft field Replied, post #14 · Evidence › Journal club · 27 Feb 2025 · 7 likes Post #13 answers the question as asked. The question underneath it is different. The baseline characteristics table is the single most useful page for the questions…
Counter-ion form: the field almost nobody reports — one year on Replied, post #20 · Analytics › COA interpretation · 23 Feb 2025 · 0 likes Building on post #19 rather than restating it. Checked the Counter-ion form claim against the primary source this morning. It survives, with a narrower scope than the…
Cost per milligram, computed honestly across formats — the long version Replied, post #7 · Access › Pricing · 10 Feb 2025 · 23 likes I had written a reply contradicting post #5 and deleted it. Here is what survived. Compute cost per delivered dose at your dose if you want a number you can act on.…
Research-use-only labelling: what it means and what it does not — the long version Replied, post #80 · Sourcing › Regulatory · 7 Feb 2025 · 1 like A label change is a regulatory event with a date and a document. Citing the document is what makes a claim about labelling checkable.
[2026 update] Lipid changes during rapid weight loss: the expected trajectory Replied, post #45 · Clinical › Bloodwork · 5 Feb 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.
Obstructive sleep apnoea and a hard endpoint in this class Replied, post #6 · Clinical › Comorbidities · 30 Jan 2025 · 0 likes Filing a mild objection to the consensus on obstructive sleep apnoea. Mild because I might be wrong; an objection because nobody has addressed the case that does not fit.
A 5 mg vial and a 0.25 mg dose: the arithmetic in full — what changed since Replied, post #5 · Practice › Reconstitution · 19 Jan 2025 · 0 likes The arithmetic in post #4 is right; the assumption feeding it is the part to check. The decimal-point error: computing 5 mg / 2 mL as 0.25 mg/mL instead of 2.5 mg/mL is…
Transit times by route, from a logged dataset — the long version Replied, post #44 · Sourcing › Logistics · 30 Dec 2024 · 13 likes Good question, well framed, and I would like to see it answered properly.
Anxiety in the first weeks: drug, situation, or both Replied, post #31 · Wellbeing › Mental health · 26 Dec 2024 · 0 likes Everything in post #29 holds. The case it does not cover is the one I have. The confident answers on anxiety and the well-sourced answers are not the same answers,…
Fixed versus detachable needles: the trade-offs Replied, post #57 · Devices › Syringes & needles · 18 Dec 2024 · 3 likes Where I part company with post #53, and it is a narrow parting. U-100 means the barrel is graduated for a solution containing one hundred units of insulin per…
Promotion criteria, and the one that stops most nominations Replied, post #117 · Documentation › Doc review · 19 Nov 2024 · 1 like I had written a reply contradicting post #115 and deleted it. Here is what survived. Where the promotion criteria discussion usually stalls is that nobody wants to say…
Follow-up: Where the four-week escalation interval comes from, and what it is not Replied, post #95 · Practice › Dosing & titration · 1 Nov 2024 · 3 likes This follows post #94 rather than contradicting it. Concentration and dose get conflated constantly in this subcategory. Changing how much diluent you add changes the…
Second pass at: Hoarding and why it makes a shortage worse Replied, post #46 · Access › Shortages · 10 Oct 2024 · 20 likes Useful. I had the fact and not the reason, which turns out to be the important half.
Follow-up: Where the four-week escalation interval comes from, and what it is not Replied, post #76 · Practice › Dosing & titration · 4 Oct 2024 · 19 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.
SURPASS-2 and the comparator dose question that will not go away Replied, post #25 · Compounds › Tirzepatide · 30 Sep 2024 · 2 likes Same experience here, different supplier, so it is at least not unique to one of them.
Semaglutide half-life: where the 165 to 184 hour figure comes from — what changed since Started this topic · Compounds › Semaglutide · 17 Aug 2024 · 0 likes Posting this under the heading it deserves: Semaglutide half-life: where the 165 to 184 hour figure comes from — what changed since Everything below is what sits behind…
High-resolution MS on aggregates and what it can see — one year on Replied, post #17 · Analytics › Mass spectrometry · 13 Aug 2024 · 30 likes Resolution and mass accuracy are different specifications. An instrument can resolve two species and still assign their masses imprecisely, and the reverse is also…
Reporting a discrepancy without making an allegation Replied, post #5 · Sourcing › Vendor reports · 26 Jul 2024 · 24 likes My experience of reporting a discrepancy contradicts the reply above. I am posting it as a data point rather than as a refutation, because one person's experience is…
Second pass at: Retatrutide dose escalation in the published trials Replied, post #48 · Compounds › Retatrutide · 19 Jul 2024 · 0 likes Triple agonism: is the effect additive, synergistic, or neither? A phase 2 comparison of tirzepatide (dual) to retatrutide (triple) would answer that question. The…
Splitting a weekly dose in two: the pharmacokinetic argument against — the long version Replied, post #118 · Practice › Dosing & titration · 10 Jul 2024 · 1 like Splitting a weekly dose in two: the pharmacokinetic argument against is that you want the benefit of long half-life, which gives a slowly changing plasma level from a…
Follow-up: Oral contraceptives and delayed emptying: what the data shows Replied, post #3 · Practice › Interactions · 18 Jun 2024 · 28 likes Research-use-only compounds have no interaction data of any kind, because interaction studies are done on medicines being developed for use in people.