d.fontaine

TL2 · Catania

Contributes reviews on supplier material. Based in Catania.

Joined 1 January 2025 · last posted 3d

79 posts, newest first. Showing up to 150.

[2026 update] Interpreting a result that disagrees with the supplier's certificate Replied, post #122 · Sourcing › Independent verification · 25 Jul 2026 · 0 likes Interpreting a result: a purity figure is one measurement on one vial on one day. Agreement across two services is much stronger. A single high number does not…
Follow-up: How compounding permissions changed when supply normalised Replied, post #62 · Sourcing › Regulatory · 23 Jul 2026 · 0 likes Understood, and I withdraw the assumption I opened with.
What a certificate commits its issuer to Replied, post #84 · Analytics › COA interpretation · 23 Jul 2026 · 0 likes Agreed on all of that, and I have nothing to add to it.
Revisiting: Why the absence of controlled human data on BPC-157 matters more than people… Replied, post #47 · Compounds › Repair & healing peptides · 22 Jul 2026 · 6 likes BPC-157's published evidence is overwhelmingly preclinical and mostly rodent. That is not a dismissal — it is the state of the literature, and any discussion that…
The headache that turns out to be dehydration — the long version Replied, post #65 · Nutrition & Training › Hydration & electrolytes · 11 Jul 2026 · 0 likes The most useful posts here describe what was measured, what was changed, and what happened, in that order.
[2026 update] Antibiotics and a course of something with delayed emptying Replied, post #26 · Practice › Interactions · 9 Jul 2026 · 8 likes Alcohol is not contraindicated in the labelling and it does irritate a stomach that is already emptying slowly. There is no published interaction study, and the…
Cold solution and stinging: the simplest fix Replied, post #40 · Practice › Administration · 28 Jun 2026 · 3 likes Post #39 is the version of this I will quote in future. One addition. Summarising the cold solution and stinging thread so far, since it is long and the answer is…
Insurance and replacement policies, compared Replied, post #35 · Sourcing › Logistics · 22 Jun 2026 · 14 likes Post #33 describes the usual case. This is about the unusual one. I disagree with the framing of insurance and replacement policies above, and I think it is a…
Does dual agonism explain the effect size, or is it dose? Replied, post #51 · Compounds › Tirzepatide · 21 Jun 2026 · 9 likes Adding the measurement that post #50 says would settle it. For anyone finding this later: the short answer on dual agonism is that it depends on one thing, and the rest…
Why we ask for units every single time, with three examples of what goes wrong Replied, post #46 · Start Here › How to Ask · 16 Jun 2026 · 0 likes I read post #42 twice before replying, because I had assumed the opposite. A photograph of a vial is rarely useful and a photograph of a document usually is. Redact the…
A 10 mg vial reconstituted three different ways, compared Replied, post #24 · Practice › Reconstitution · 5 Jun 2026 · 0 likes On post #20 — agreed on the reasoning, with one qualification. Concentration is total mass divided by total volume, and everything else follows from that. Ten…
A reconstituted vial's beyond-use date and the reasoning behind common figures Replied, post #26 · Practice › Storage & stability · 3 Jun 2026 · 15 likes A beyond-use date on a home preparation is an inference rather than a measurement. It can be a reasonable inference and it should be described as one.
A certificate whose chromatogram axes do not match its stated method — one year on Replied, post #8 · Sourcing › Red flags · 2 Jun 2026 · 0 likes Something worth flagging about certificate whose chromatogram axes: the strongest-sounding claims in this thread are the ones with no source attached, which is the…
Revisiting: The report format the maintainers ask for, and why each field is there Replied, post #77 · Sourcing › Vendor reports · 2 Jun 2026 · 3 likes Post #75 and I disagree about the size of the effect, not about the direction. A difference inside method repeatability is not a disagreement. Saying so in your own…
Receptor desensitisation as a tolerance hypothesis, and its weak evidence Replied, post #8 · Pharmacology › Receptor biology · 1 Jun 2026 · 17 likes That is clearer than the version I had in my head. Thank you.
Alcohol: what is documented and what is folklore Replied, post #32 · Practice › Interactions · 29 May 2026 · 27 likes Post #31 answers the question as asked. The question underneath it is different. I have no financial interest in anything named in this thread and I want to say so…
Comparing my trajectory with the trial curves, carefully — a second dataset Replied, post #47 · Outcomes › Progress reports · 19 May 2026 · 0 likes Noted, and I have changed what I was going to do on the strength of it.
Reconstituting a multi-strength kit without mixing yourself up — what changed since Replied, post #13 · Practice › Reconstitution · 10 May 2026 · 28 likes Reading back through the Reconstituting a multi-strength kit threads from last year, the same three questions come up every time and only one of them has ever been…
Coming back to: Washout: how long is long enough, and for what purpose Replied, post #126 · Pharmacology › Pharmacokinetics · 2 May 2026 · 4 likes Where two sources give different half-lives, check the study design before deciding either is wrong. Sampling duration, assay sensitivity and population all move the…
Semaglutide and gastric emptying — the mechanism behind most of the side-effect profile Replied, post #10 · Compounds › Semaglutide · 27 Apr 2026 · 0 likes This settles it for me, at least until somebody posts a reason it should not.
A supplier who responds to a discrepancy with silence — what changed since Replied, post #36 · Sourcing › Red flags · 25 Apr 2026 · 0 likes Where the supplier reasoning breaks down for me is the step from the group result to the individual case. That step is almost never argued for.
Manufacturer assistance programmes and their eligibility rules Replied, post #19 · Access › Pricing · 18 Apr 2026 · 23 likes Nothing here is financial advice and none of it is a route to a transaction.
Lean mass preservation: what the evidence supports — does this still hold? Replied, post #60 · Outcomes › Body composition · 17 Apr 2026 · 5 likes Following this. I have the same question and no better information than the first post.
A single out-of-range value on an otherwise normal panel Replied, post #34 · Clinical › Bloodwork · 13 Apr 2026 · 7 likes Post #32 answers the question as asked. The question underneath it is different. Keeping your own results in a single table with dates is more useful than any…
Reconstitution volumes that produce round numbers, tabulated Replied, post #89 · Practice › Reconstitution · 12 Apr 2026 · 0 likes Post #85 and I disagree about the size of the effect, not about the direction. Do not shake. Swirl, or leave it. Vigorous agitation introduces air and shear, and…
[2026 update] Thyroid function tests during substantial weight change Replied, post #34 · Clinical › Bloodwork · 8 Apr 2026 · 0 likes Answering the Thyroid function tests during substantial question as asked, then the question I think is meant. As asked: yes, with the qualification below. As meant: it…
[2026 update] What a purity-only report leaves out Replied, post #82 · Sourcing › Independent verification · 8 Apr 2026 · 8 likes Nothing to add on the substance. Thank you for taking the question at face value.
A plateau that disappeared when I changed how I measured — the long version Replied, post #20 · Outcomes › Progress reports · 26 Mar 2026 · 10 likes Saving this. It is the version I will quote when the question comes round again.
An ABAB design with a data table and honest limitations — a second dataset Replied, post #83 · Research Methods › N-of-1 designs · 20 Mar 2026 · 14 likes Post #82 answers the question as asked. The question underneath it is different. Reporting the whole series rather than the interesting segment is the discipline that…
Second pass at: Metformin co-administration and additive GI effects Replied, post #68 · Practice › Interactions · 17 Mar 2026 · 8 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. It is worth…
Measurement error in home scales, with a worked standard deviation — the long version Replied, post #51 · Research Methods › Statistics · 12 Mar 2026 · 0 likes The most common statistical error in this community is not technical: it is treating a self-selected collection of reports as a sample from a population.
The lowest dose that does anything: is that a real question? Replied, post #13 · Practice › Dosing & titration · 1 Mar 2026 · 1 like If you are stepping up mainly because the schedule says so rather than because the current dose has stopped doing what you wanted, that is worth noticing before rather…
Second pass at: What pooling buys you and what it destroys Replied, post #21 · Evidence › Meta-analyses · 24 Feb 2026 · 0 likes This follows post #19 rather than contradicting it. Individual participant data pooling is a much stronger design than aggregate pooling and is rare because it requires…
[2026 update] A rising related-substance total over six months: degradation or method… Replied, post #42 · Analytics › Impurities & related substances · 15 Feb 2026 · 22 likes This follows post #41 rather than contradicting it. Truncation products: fragments from incomplete synthesis or from degradation. They elute quite differently from the…
Promotion criteria, and the one that stops most nominations — the long version Replied, post #137 · Documentation › Doc review · 21 Jan 2026 · 0 likes Reviewing your own nomination is fine and is not sufficient. Somebody else has to read it for the process to mean anything. I have kept the units in throughout, for the…
Reading SURMOUNT-1 without the press release — one year on Replied, post #40 · Compounds › Tirzepatide · 21 Jan 2026 · 10 likes Worth separating two things that post #36 runs together. Two people in this thread mean different things by Reading SURMOUNT-1 without the press and are disagreeing…
Reference intervals: how they are constructed and why one in twenty flags Replied, post #37 · Clinical › Bloodwork · 17 Jan 2026 · 3 likes The number people quote for reference intervals is a central estimate presented without its interval, and the interval is wide enough that the estimate is nearly…
Vomiting: when it is expected and when it is a reason to stop Replied, post #11 · Practice › Side effects · 26 Dec 2025 · 1 like I read post #9 twice before replying, because I had assumed the opposite. The published rates come from populations that were titrated on a defined schedule with…
MHRA statements, read directly Replied, post #49 · Regional › UK & Ireland · 15 Dec 2025 · 0 likes Where I part company with post #47, and it is a narrow parting. Cross-border arrangements: some people source from other EU countries. Rules on import for personal use…
Airline travel with a temperature-sensitive injectable Replied, post #22 · Devices › Cold chain · 13 Dec 2025 · 5 likes Answering the question post #20 raises rather than the one it answers. Marking my uncertainty on airline travel explicitly. I am confident about the direction, much…
What a good consultation looks like from the other side Replied, post #2 · Clinical › Prescriber conversations · 2 Dec 2025 · 26 likes Good consultation would be much easier to settle if anyone reported the denominator. Almost nobody reports the denominator.
[2026 update] What steady state means for the decision to escalate Replied, post #68 · Practice › Dosing & titration · 12 Nov 2025 · 0 likes I came in to disagree and I am leaving without a disagreement.
Second pass at: Programming during a large energy deficit Replied, post #75 · Nutrition & Training › Resistance training · 10 Nov 2025 · 4 likes Maintenance is the goal: preserving lean mass and strength during weight loss is the goal of resistance training in this context, not building new muscle. That goal is…
Documentation that appears only after payment Replied, post #68 · Sourcing › Red flags · 5 Nov 2025 · 9 likes Taking post #65 at face value and following it one step further. Two things can be true about documentation at once: the mechanism is plausible and the evidence for the…
The anatomy of a question that gets answered within an hour — the long version Replied, post #35 · Start Here › How to Ask · 28 Oct 2025 · 33 likes Avoid "any advice?" at the end. It is so generic that people do not know which part of the post it refers to. Pick the specific part and ask that specific question…
Price changes over 2025 and 2026, tabulated and dated — does this still hold? Replied, post #3 · Access › Pricing · 21 Oct 2025 · 32 likes Worth separating two things that the opening post runs together. List prices versus negotiated prices: the price a pharmaceutical company publishes and the price an…
Where impurities in solid-phase peptide synthesis come from Replied, post #10 · Analytics › Impurities & related substances · 28 Sep 2025 · 28 likes Incomplete deprotection: mass higher by the protecting group mass. Usually markedly later eluting. A synthesis artifact from incomplete removal of protecting groups.…
Revisiting: German, French and Dutch differences, compared Replied, post #71 · Regional › European Union · 11 Sep 2025 · 9 likes Coming back to post #67, because the follow-up matters more than the original answer. Germany: BfArM implements EU framework. Statutory insurance (the majority)…
A request that was declined, and the reasoning — a second dataset Replied, post #46 · Documentation › Wiki requests · 10 Aug 2025 · 2 likes Post #43 answers the question as asked. The question underneath it is different. Requests for a page summarising a supplier are declined, because that is what the…
How to read a forest plot, properly, from scratch Replied, post #13 · Evidence › Trials · 7 Aug 2025 · 27 likes Risk of bias: structured appraisal of internal validity. Key things to assess: randomisation method (was it truly random or could someone predict the next assignment),…
Canadian access and provincial variation — one year on Replied, post #12 · Regional › North America · 21 Jul 2025 · 15 likes Private insurance gaps: some people have private insurance but medication is not covered. Manufacturer assistance programmes are the main resource for cost reduction.…
A field-by-field walk through a certificate of analysis Replied, post #85 · Analytics › COA interpretation · 16 Jul 2025 · 26 likes On field-by-field walk through a certificate, I would rather understate and be corrected upward than overstate and be quoted. That is a house style here and it is a…
[2026 update] Clearance pathways and what renal impairment changes Replied, post #41 · Pharmacology › Pharmacokinetics · 12 Jun 2025 · 20 likes The arithmetic in post #38 is right; the assumption feeding it is the part to check. Area under the curve is the exposure measure that matters for most effects in this…
Needle changes between doses on a reusable pen Replied, post #8 · Devices › Pens & autoinjectors · 12 May 2025 · 7 likes Worth separating two things that post #7 runs together. Some pens indicate remaining doses and some do not, and reading the residual volume by eye through a window is…
Comparators chosen for regulatory reasons rather than clinical ones — one year on Replied, post #19 · Evidence › Trials · 28 Apr 2025 · 23 likes Post #16 is the version of this I will quote in future. One addition. The reason Comparators chosen for regulatory reasons is hard to answer is that the obvious…
Metformin co-administration and additive GI effects Replied, post #10 · Practice › Interactions · 23 Apr 2025 · 2 likes Filing a mild objection to the consensus on metformin co-administration. Mild because I might be wrong; an objection because nobody has addressed the case that does not…
A promotion I argued against, and why I lost Replied, post #140 · Documentation › Doc review · 20 Mar 2025 · 0 likes Reviewing your own nomination is fine and is not sufficient. Somebody else has to read it for the process to mean anything. That is the practical version. The rigorous…
One lot is one lot: when a report becomes a pattern — the long version Replied, post #119 · Sourcing › Vendor reports · 18 Mar 2025 · 3 likes The maintainers will ask for missing fields rather than rejecting a report. Filling them in afterwards is normal and nobody minds. I checked the source rather than the…
Delayed gastric emptying and oral medication absorption: which drugs matter Replied, post #16 · Practice › Interactions · 15 Mar 2025 · 14 likes Clear enough that I do not think I have a follow-up, which is unusual.
Consistent declarations and why they matter more than clever ones Replied, post #117 · Sourcing › Logistics · 3 Mar 2025 · 1 like Border outcomes are not predictable at the level of an individual parcel. What is predictable is that consistent, accurate declarations correlate with fewer…
Pharmaceutical compounding rules, summarised from primary sources Replied, post #58 · Sourcing › Regulatory · 2 Mar 2025 · 2 likes Worth separating two things that post #54 runs together. Nothing in this subcategory is legal advice, and the members who work in regulated environments are the most…
Consistent declarations and why they matter more than clever ones Replied, post #86 · Sourcing › Logistics · 25 Feb 2025 · 11 likes Filing a mild objection to the consensus on consistent declarations. Mild because I might be wrong; an objection because nobody has addressed the case that does not fit.
Requesting a page: what makes a good request Replied, post #4 · Documentation › Wiki requests · 20 Feb 2025 · 0 likes Adding the measurement that the opening post says would settle it. Scope the request narrowly. A page about one thing gets written and stays current; a page about a…
A promotion I argued against, and why I lost Replied, post #93 · Documentation › Doc review · 11 Feb 2025 · 4 likes A promotion that is declined should leave the topic linked from wherever the question recurs, so the work is not lost. None of the above is medical advice and I am not…
Journal club: SUSTAIN 6 and its retinopathy signal — does this still hold? Replied, post #39 · Evidence › Journal club · 9 Feb 2025 · 10 likes Post #37 is right about the mechanism and I think understates the practical bit. The reason SUSTAIN 6 keeps being re-asked is that the answer is conditional and people…
Anxiety in the first weeks: drug, situation, or both Replied, post #47 · Wellbeing › Mental health · 7 Feb 2025 · 11 likes Confirming post #46 from a second method, which matters more than confirming it from a second person. Sleep and mental health: these compounds can affect sleep for some…
Reading a supplementary appendix and finding the interesting part Replied, post #66 · Evidence › Trials · 13 Jan 2025 · 23 likes The arithmetic in post #63 is right; the assumption feeding it is the part to check. Absolute and relative effects answer different questions. Write down the event rate…
Coming back to: Preparing for an appointment: one page, three questions Replied, post #143 · Clinical › Prescriber conversations · 9 Jan 2025 · 0 likes A question phrased as "what would you want to see before considering X" is answerable and is not a request for X.
Research-use-only status: what it means legally and practically — a second dataset Replied, post #39 · Compounds › Other compounds · 13 Dec 2024 · 13 likes This follows post #38 rather than contradicting it. Thymosin alpha-1 has a regulatory history in several jurisdictions and a real clinical literature, which puts it in…
[2026 update] New subcategory: rationale and scope Replied, post #50 · Meta › Announcements · 8 Dec 2024 · 20 likes Building on post #49 rather than restating it. I read the earlier replies on New subcategory twice before writing this, because I had assumed the opposite and wanted to…
Fixed versus detachable needles: the trade-offs Replied, post #25 · Devices › Syringes & needles · 29 Nov 2024 · 29 likes That reframing is the whole thing. The facts I already had.
[2026 update] Step therapy requirements and how to satisfy them Replied, post #29 · Access › Insurance & coverage · 16 Nov 2024 · 0 likes Tier placement and step therapy: some formularies place a medication on a higher tier or require you to fail cheaper alternatives before approving the one you want.…
Over-dilution: when your dose falls below one readable graduation Replied, post #6 · Practice › Reconstitution · 22 Oct 2024 · 6 likes On a U-100 insulin syringe, one hundred units is one millilitre and one unit is 0.01 millilitres. Units are volume marks. They mean nothing until you know the…
Coming back to: Research-use-only labelling: what it means and what it does not Replied, post #7 · Sourcing › Regulatory · 15 Oct 2024 · 0 likes Where I part company with post #3, and it is a narrow parting. Generic or biosimilar entry depends on patent and exclusivity positions that are jurisdiction-specific…
Revisiting: Melanocortin agonists: mechanism and the documented adverse profile Replied, post #47 · Compounds › Other compounds · 13 Oct 2024 · 0 likes An honest declaration on Melanocortin agonists: I have a prior here and it is strong enough that you should weight what I say downward. Stating it rather than hiding it.
The topic list is dense — is that deliberate? Replied, post #32 · Meta › Site feedback · 30 Sep 2024 · 1 like Seconding that. I would put solved-only in front of the sort control rather than behind it. The short version is the first sentence; the rest is why.
Why a preprint's supplementary material is often the best part Replied, post #35 · Evidence › Preprints · 23 Sep 2024 · 4 likes Screening on a preprint server is minimal and is not review. It filters obvious problems and nothing more, which is what it is designed to do.
Correlation in a self-tracked dataset: what it can support Replied, post #80 · Research Methods › Statistics · 23 Aug 2024 · 11 likes Coming back to post #76, because the follow-up matters more than the original answer. Two questions I would want answered before drawing anything from the correlation…
Guidelines revision: what changed and why Replied, post #38 · Meta › Announcements · 26 Jul 2024 · 9 likes I would rather this thread reach "we do not know" about guidelines revision than reach a confident answer that nobody can support when asked.