e.almeida

TL2 Member · Haarlem, NL

Based in the EU. Tracks what is available and funded locally, and dates every claim.

Joined 20 September 2024 · last posted 10d · groups: regional-eu

95 posts, newest first. Showing up to 150.

What a good consultation looks like from the other side Replied, post #60 · Clinical › Prescriber conversations · 18 Jul 2026 · 0 likes Where I would push back on the good consultation consensus is the confidence, not the direction. The direction looks right. The confidence is borrowed.
Journal club: what we got wrong in an earlier session Replied, post #89 · Evidence › Journal club · 16 Jul 2026 · 9 likes Sessions on negative or null results are consistently the most instructive and the hardest to get anyone to attend.
[2026 update] Does a peptide degrade silently, with no visual change? Replied, post #87 · Practice › Storage & stability · 13 Jul 2026 · 0 likes Building on post #84 rather than restating it. An honest declaration on peptide: I have a prior here and it is strong enough that you should weight what I say downward.…
Official shortage notices and what they authorise Replied, post #120 · Access › Shortages · 21 Jun 2026 · 13 likes Reports that a pharmacy has stock are the least durable information on the site and are still worth posting with a date. Someone should write this up properly, and it…
Why cagrilintide alone is discussed so much less than in combination — does this still… Replied, post #11 · Compounds › Cagrilintide & amylin analogues · 19 Jun 2026 · 1 like Agreed, and I will stop repeating the version of this I had been repeating.
Naming conventions for research peptides and the confusion they cause Replied, post #17 · Compounds › Other compounds · 18 Jun 2026 · 1 like Fragment compounds — where the material is part of a larger natural protein — should be identified by sequence rather than by name, because the naming in this space is…
Revisiting: How this community labels and discusses unrefereed work Replied, post #3 · Evidence › Preprints · 17 Jun 2026 · 10 likes Agreed, and I will stop repeating the version of this I had been repeating.
Coming back to: Specificity, linearity, accuracy, precision, range, robustness — with… Replied, post #50 · Analytics › Method validation · 11 Jun 2026 · 23 likes On post #48 — agreed on the reasoning, with one qualification. Specificity is the first question: does the method separate the analyte from everything reasonably…
Second pass at: Metformin co-administration and additive GI effects Replied, post #121 · Practice › Interactions · 7 Jun 2026 · 0 likes If someone has run Metformin co-administration properly I would rather read that than my own reconstruction of it. Posting mine only because the thread has gone quiet.
A certificate whose chromatogram axes do not match its stated method — one year on Replied, post #42 · Sourcing › Red flags · 4 Jun 2026 · 1 like The strongest single signal available cheaply is what happens when you ask a technical question. A quantitative answer inside a working day is difficult to fake at…
Semaglutide and gastric emptying — the mechanism behind most of the side-effect profile Replied, post #43 · Compounds › Semaglutide · 29 May 2026 · 21 likes Solutions of semaglutide can look faintly opalescent without anything being wrong. Visible particulate, fibres or frank cloudiness are a different observation entirely…
Coming back to: Solubility limits and what a cloudy solution is telling you Replied, post #25 · Pharmacology › Formulation chemistry · 23 May 2026 · 0 likes Fill volume and headspace: the amount of solution in a vial and the air above it affect how much the solution is exposed to oxygen during storage. Less headspace means…
Spreadsheets: an appreciation — what changed since Replied, post #44 · Lounge › Off topic · 16 May 2026 · 0 likes I would call the community position on Spreadsheets likely rather than established, and I would be comfortable defending that hedge.
An 18-month record including the parts that went badly Replied, post #16 · Outcomes › Progress reports · 14 May 2026 · 3 likes Post #14 and I disagree about the size of the effect, not about the direction. I would put moderate confidence on the mainstream reading of 18-month record and no more.…
Blind submission and why it changes minds — the long version Replied, post #53 · Sourcing › Independent verification · 2 May 2026 · 19 likes On post #49 — agreed on the reasoning, with one qualification. I think the Blind submission question is answerable and has not been answered, which is a more optimistic…
A widely repeated interaction claim that turns out to be unsupported — what changed since Replied, post #36 · Practice › Interactions · 2 May 2026 · 10 likes Adding the boring version of widely repeated interaction claim, because the interesting version keeps getting posted and the boring one is usually right. Check the…
Revisiting: A field-by-field walk through a certificate of analysis Replied, post #4 · Analytics › COA interpretation · 27 Apr 2026 · 7 likes A chromatogram supplied as a small image is legible for peak shape and not for baseline detail. That is enough to sanity-check an integration and not enough to…
[2026 update] What a purity-only report leaves out Replied, post #97 · Sourcing › Independent verification · 20 Apr 2026 · 0 likes Acknowledging rather than arguing. The reasoning holds as far as I can follow it.
0.3 mL versus 0.5 mL versus 1 mL barrels: resolution matters Replied, post #11 · Devices › Syringes & needles · 9 Apr 2026 · 11 likes Post #8 answers the question as asked. The question underneath it is different. U-100 means the barrel is graduated for a solution containing one hundred units of…
Grapefruit: why this class is not the class that cares Replied, post #123 · Practice › Interactions · 5 Apr 2026 · 13 likes SGLT2 inhibitors: frequently co-administered and relevant to renal and cardiovascular discussion, not to interactions. There is no pharmacokinetic interaction of concern.
Second pass at: Submitting a sample: the process end to end Replied, post #16 · Sourcing › Independent verification · 26 Mar 2026 · 1 like Post #12 put the caveat in the right place and I want to underline it. On Submitting a sample, I would rather understate and be corrected upward than overstate and be…
Why the titration planner refuses to produce a schedule below a floor Replied, post #51 · Data & Tools › Calculators · 19 Mar 2026 · 15 likes Useful. I have added it to my own notes with the date on it.
What "marked as solution" means and who gets to mark it — does this still hold? Replied, post #55 · Start Here › Welcome · 19 Mar 2026 · 10 likes Adding a note of thanks rather than an opinion. I did not know most of that.
Type 2 diabetes and the largest part of the evidence base — does this still hold? Started this topic · Clinical › Comorbidities · 15 Mar 2026 · 8 likes Type 2 diabetes and the largest part of the evidence base — does this still hold? I have a specific reason for asking rather than idle curiosity, and the context is…
Measurement error in home scales, with a worked standard deviation — the long version Replied, post #48 · Research Methods › Statistics · 8 Mar 2026 · 0 likes One caution on Measurement error in home scales: everything above assumes the underlying documentation is what it claims to be. That assumption is doing real work and…
Follow-up: Evidence quality in the secretagogue literature: an honest assessment Replied, post #17 · Compounds › Secretagogues & GH axis · 3 Mar 2026 · 0 likes Source for the Evidence quality figure, since it was asked for. It is in the discussion rather than the abstract, which is why the version circulating is stronger than…
Interpreting a result that disagrees with the supplier's certificate Replied, post #145 · Sourcing › Independent verification · 2 Mar 2026 · 23 likes Building on post #144 rather than restating it. The number people quote for interpreting a result is a central estimate presented without its interval, and the interval…
[2026 update] Confounding by indication, explained with a concrete example Replied, post #95 · Evidence › Study critique · 28 Feb 2026 · 0 likes Building consensus on which criticisms matter: if everyone agrees that the sample size is small but only you think that affects the conclusion, maybe your criticism is…
Clearance pathways and what renal impairment changes Replied, post #9 · Pharmacology › Pharmacokinetics · 24 Feb 2026 · 7 likes Moving an injection by a day changes the concentration-time profile very little at these half-lives. It can change when somebody notices symptoms, which is a different…
Research-use-only labelling: what it means and what it does not Replied, post #107 · Sourcing › Regulatory · 23 Feb 2026 · 0 likes Post #105 put the caveat in the right place and I want to underline it. Nothing in this subcategory is legal advice, and the members who work in regulated environments…
Choosing which test to pay for, given a fixed budget Replied, post #2 · Sourcing › Independent verification · 20 Feb 2026 · 8 likes It does not extend to lots nobody has seen, it is not a recommendation, and it says nothing about anything other than what was measured. Genuinely open to being wrong…
Second pass at: Adsorptive losses at low concentration, and why dilute solutions are… Replied, post #35 · Practice › Storage & stability · 7 Feb 2026 · 5 likes Post #33 describes the usual case. This is about the unusual one. Refrigeration slows degradation. Repeated warming and cooling is worse than continuous refrigeration.…
Dead volume across syringe and needle combinations Replied, post #61 · Devices › Syringes & needles · 26 Jan 2026 · 2 likes Taking post #60 at face value and following it one step further. A detachable luer needle plus hub can retain enough volume to matter. Whether it matters to you depends…
Second pass at: Pregnancy and pregnancy planning: contraindication and washout Replied, post #80 · Clinical › Special populations · 25 Jan 2026 · 8 likes Summarising the Pregnancy and pregnancy planning thread so far, since it is long and the answer is buried: the first reply has the method, the fourth has the correction…
Journal club: PIONEER 6 as a safety trial Replied, post #13 · Evidence › Journal club · 6 Jan 2026 · 11 likes Where I part company with post #9, and it is a narrow parting. PIONEER 6 (N Engl J Med 2019): Cardiovascular safety trial for oral semaglutide, not efficacy.…
[2026 update] Publication patterns in the BPC-157 literature, examined Replied, post #3 · Compounds › Repair & healing peptides · 2 Jan 2026 · 21 likes Everything in the opening post holds. The case it does not cover is the one I have. Nothing in this subcategory is medical advice and several members here are…
What to include when your question involves a chromatogram Replied, post #12 · Start Here › How to Ask · 31 Dec 2025 · 1 like Post #8 put the caveat in the right place and I want to underline it. If your question has a deadline — a parcel in transit, a delivery you have to accept or refuse —…
AOD-9604 and the fragment hypothesis, revisited Replied, post #38 · Compounds › Other compounds · 27 Dec 2025 · 24 likes Picking up post #36: that is the part I would want checked first. Thymosin alpha-1 has a regulatory history in several jurisdictions and a real clinical literature,…
How to read a phase 2 result without treating it as a phase 3 result Replied, post #33 · Compounds › Retatrutide · 25 Dec 2025 · 9 likes Narrowing post #30, because the general version has more than one answer. Phase 2 sample sizes are not adequate for safety characterisation of a novel triple agonist.…
Dizziness on standing and the electrolyte explanation — does this still hold? Replied, post #24 · Practice › Side effects · 12 Dec 2025 · 0 likes Adding the measurement that post #23 says would settle it. Second-hand on Dizziness on standing, so weight it accordingly — someone whose method I trust told me this…
Semaglutide half-life: where the 165 to 184 hour figure comes from Replied, post #59 · Compounds › Semaglutide · 1 Dec 2025 · 0 likes Semaglutide half-life 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…
Reading an interaction checker output critically Replied, post #44 · Practice › Interactions · 16 Nov 2025 · 0 likes I read post #40 twice before replying, because I had assumed the opposite. Alcohol is not contraindicated in the labelling and it does irritate a stomach that is…
New subcategory: rationale and scope Replied, post #115 · Meta › Announcements · 25 Oct 2025 · 15 likes On new subcategory, I would rather understate and be corrected upward than overstate and be quoted. That is a house style here and it is a good one.
The anatomy of a question that gets answered within an hour — the long version Replied, post #19 · Start Here › How to Ask · 23 Oct 2025 · 0 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…
SURMOUNT-4 and what withdrawal data does and does not tell an individual — one year on Replied, post #46 · Compounds › Tirzepatide · 21 Oct 2025 · 5 likes Weight reduction figures from SURMOUNT-1 are frequently quoted without the trial's duration attached. A mean change at 72 weeks and a mean change at 40 weeks are…
Pinch or no pinch, and how needle length changes the answer Replied, post #116 · Practice › Administration · 18 Oct 2025 · 28 likes Confirming post #114 from a second method, which matters more than confirming it from a second person. I changed my mind about pinch after someone here asked me for the…
A preprint whose numbers changed substantially at publication Replied, post #51 · Evidence › Preprints · 13 Sep 2025 · 5 likes Post #48 is right about the mechanism and I think understates the practical bit. Screening on a preprint server is minimal and is not review. It filters obvious…
Aggregated purity results across four services, with caveats — a second dataset Replied, post #79 · Data & Tools › Datasets · 9 Sep 2025 · 1 like Where a value is derived rather than measured, mark it. Derived columns get treated as observations the moment the file leaves your hands.
Research-use-only labelling: what it means and what it does not Replied, post #30 · Sourcing › Regulatory · 5 Sep 2025 · 0 likes A definition problem is doing most of the work in this research-use-only labelling discussion. Once the term is pinned down I suspect the disagreement mostly goes away…
When to stop reading forums, including this one Replied, post #22 · Wellbeing › Mental health · 5 Sep 2025 · 5 likes Where a member is finding this hard, the useful reply is usually a question rather than an answer, and this subcategory does that well. I would want to see it done…
Temperature loggers worth the money Replied, post #25 · Devices › Cold chain · 2 Sep 2025 · 16 likes Insulation performance depends on the mass of the coolant more than on the thickness of the box. A large pack in a modest box outperforms a small pack in a good one. I…
[2026 update] What the GIP component of tirzepatide is thought to contribute, and how… Replied, post #109 · Compounds › Tirzepatide · 20 Aug 2025 · 11 likes Research-use-only tirzepatide is not approved for human use and is not made to pharmaceutical standards. Anyone discussing it here is describing what they did, not…
An emergency department visit, described afterwards Replied, post #56 · Safety › Adverse events · 20 Aug 2025 · 0 likes I have been on both sides of the emergency department visit argument in this category within eighteen months, which should tell you how strong the evidence for either…
Coming back to: A community side-effect dataset, with its response rate and biases Replied, post #10 · Data & Tools › Datasets · 14 Aug 2025 · 22 likes Bias toward positive outcomes: datasets collected by members are biased toward people who found the compounds useful. People who did not respond do not return. People…
[2026 update] What we do not know about retatrutide, listed explicitly Replied, post #46 · Compounds › Retatrutide · 13 Aug 2025 · 0 likes Where I part company with post #42, and it is a narrow parting. Anyone deciding on the basis of what is published should know that what is published is a phase 2…
[2026 update] Journal club: is percentage weight change the right endpoint? Replied, post #6 · Evidence › Journal club · 9 Aug 2025 · 0 likes Second this, and I would have said it less carefully.
"Should I double up?" — answered once, at length, calmly Replied, post #10 · Practice › Administration · 4 Aug 2025 · 6 likes This follows post #7 rather than contradicting it. Nothing in this subcategory is medical advice and none of it is a substitute for a demonstration from somebody…
How to research a compound with no human data without deceiving yourself Replied, post #71 · Compounds › Other compounds · 2 Aug 2025 · 14 likes Solubility varies far more across this subcategory than within the incretins. A compound that needs a specific diluent or a specific pH is not being difficult; it has a…
Follow-up: The decimal-point error, and the habit that catches it Replied, post #27 · Practice › Reconstitution · 18 Jul 2025 · 14 likes The claim about decimal-point error upthread is stronger than its source supports. I have read the source. The source says "associated with" and the post says "causes".
A field-by-field walk through a certificate of analysis Replied, post #61 · Analytics › COA interpretation · 16 Jul 2025 · 13 likes "Not less than 98 per cent" is a specification. "98.3 per cent" is a result. A certificate carrying only the first has not told you what was measured. The variance…
Journal club: SURMOUNT-1, read without the press release Replied, post #157 · Evidence › Journal club · 12 Jul 2025 · 14 likes Where the group cannot agree, record the disagreement rather than resolving it by seniority. The recorded disagreement is more honest and more useful later. A…
Coming back to: Nausea profile of amylin analogues compared with GLP-1 agonists Replied, post #47 · Compounds › Cagrilintide & amylin analogues · 11 Jul 2025 · 6 likes Post #44 is right about the mechanism and I think understates the practical bit. My understanding of Nausea profile of amylin analogues is a few years old and may have…
Whether an aggregate is worth publishing at all: a disputed topic Replied, post #22 · Data & Tools › Datasets · 2 Jul 2025 · 0 likes Post #19 put the caveat in the right place and I want to underline it. Where the whether an aggregate discussion usually stalls is that nobody wants to say "I do not…
Comparing my trajectory with the trial curves, carefully Replied, post #12 · Outcomes › Progress reports · 8 Jun 2025 · 0 likes Maintenance series are the ones this subcategory needs most and receives least. The interesting questions all change once loss stops.
Second pass at: Pharmacy supply in the UK and the questions you will be asked Replied, post #42 · Regional › UK & Ireland · 2 Jun 2025 · 0 likes Useful. I had the fact and not the reason, which turns out to be the important half.
Antibiotics and a course of something with delayed emptying Replied, post #38 · Practice › Interactions · 10 May 2025 · 1 like Oral medications versus time: if you take an oral medication 30 minutes before semaglutide (which slows gastric emptying), the delayed stomach emptying affects when and…
Adjudicated events and why the definition matters — the long version Replied, post #115 · Evidence › Trials · 23 Apr 2025 · 6 likes I read post #113 twice before replying, because I had assumed the opposite. Absolute and relative effects answer different questions. Write down the event rate in each…
Requesting a page: what makes a good request Replied, post #56 · Documentation › Wiki requests · 13 Apr 2025 · 24 likes I had written a reply contradicting post #52 and deleted it. Here is what survived. Name a willing maintainer in the request. Point three of the criteria stops more…
A certificate with no method stated: what can you conclude? Replied, post #48 · Analytics › COA interpretation · 9 Apr 2025 · 24 likes An itemised related-substances table with retention times says considerably more about the synthesis than a single total. A total tells you how much is not the main…
Preservatives: function, testing, and limits Replied, post #27 · Pharmacology › Formulation chemistry · 2 Apr 2025 · 0 likes On preservatives I would separate what is worth knowing from what is worth acting on. The first list is long and the second is short, and conflating them is how threads…
Why cagrilintide alone is discussed so much less than in combination Replied, post #78 · Compounds › Cagrilintide & amylin analogues · 31 Mar 2025 · 0 likes Comparing an amylin analogue to an incretin agonist on weight change alone misses that they were developed to be used together rather than instead of each other.
A certificate with no method stated: what can you conclude? Replied, post #9 · Analytics › COA interpretation · 30 Mar 2025 · 11 likes Reading old certificates: if a certificate is dated years ago, the lot it describes might be old. That is not automatically a problem but it is worth noting. Fresh…
Assessing a warm arrival: the decision process Replied, post #18 · Sourcing › Logistics · 24 Mar 2025 · 0 likes The question underneath assessing a warm arrival is usually "how would I tell?" rather than "what is true?", and that one has a method attached to it. Write down what…
Maintainer handover: how it works Replied, post #57 · Meta › Wiki maintenance · 17 Mar 2025 · 24 likes Cross-referencing: if two pages should reference each other but do not, suggesting the cross-reference helps the maintainer see the connection. That has been true for…
Biased agonism: a real phenomenon, an over-used explanation Replied, post #103 · Pharmacology › Receptor biology · 15 Mar 2025 · 1 like Post #101 put the caveat in the right place and I want to underline it. GIP receptor signalling: the glucose-dependent insulinotropic peptide receptor (GIP) is involved…
Counter-ion form: the field almost nobody reports — one year on Replied, post #82 · Analytics › COA interpretation · 14 Mar 2025 · 11 likes I read post #80 twice before replying, because I had assumed the opposite. I have been on both sides of the Counter-ion form argument in this category within eighteen…
Anaesthesia and elective surgery: the aspiration question — does this still hold? Replied, post #27 · Practice › Interactions · 6 Mar 2025 · 5 likes Coming back to post #26, because the follow-up matters more than the original answer. Having read the whole Anaesthesia and elective surgery thread before replying: the…
Revisiting: What a well-designed human trial of a secretagogue would look like Replied, post #69 · Compounds › Secretagogues & GH axis · 4 Feb 2025 · 27 likes Adding the measurement that post #68 says would settle it. Hexarelin and the earlier peptidyl secretagogues have more published human data than the newer ones and a…
Canadian access and provincial variation Replied, post #48 · Regional › North America · 3 Feb 2025 · 19 likes This is the first time the answer has come with its own limits attached. Appreciated.
Semaglutide half-life: where the 165 to 184 hour figure comes from — what changed since Replied, post #95 · Compounds › Semaglutide · 29 Jan 2025 · 6 likes Discontinuation rates in the trials are worth reading alongside efficacy and almost never are. A large mean effect in a population where a meaningful fraction stopped…
A page that has drifted out of date and needs a maintainer Replied, post #47 · Documentation › Wiki requests · 3 Jan 2025 · 1 like A document with no maintainer becomes wrong quietly, which is worse than not existing, because it carries the authority of a maintained page. If this contradicts…
Revisiting: Holding a dose indefinitely: is there a documented downside? Replied, post #17 · Practice › Dosing & titration · 16 Dec 2024 · 30 likes Dose equivalence between different incretin analogues is a weak concept. The molecules differ in structure, half-life, receptor selectivity, and in what has been…
Transit times by route, from a logged dataset — the long version Replied, post #38 · Sourcing › Logistics · 12 Dec 2024 · 3 likes Post #35 is right about the mechanism and I think understates the practical bit. I would call the community position on Transit times likely rather than established,…
Journal club: SUSTAIN 6 and its retinopathy signal — does this still hold? Replied, post #11 · Evidence › Journal club · 9 Dec 2024 · 1 like Picking up post #8: that is the part I would want checked first. A definition problem is doing most of the work in this SUSTAIN 6 discussion. Once the term is pinned…
Second pass at: Choosing a concentration on purpose rather than by accident Replied, post #3 · Practice › Reconstitution · 1 Nov 2024 · 7 likes I had written a reply contradicting the opening post and deleted it. Here is what survived. Reconstituting a multi-strength kit: if a kit contains 5 mg, 10 mg, 15 mg…
Hypertension improvement and when medication needs revisiting — a second dataset Replied, post #17 · Clinical › Comorbidities · 11 Oct 2024 · 6 likes Everything in post #13 holds. The case it does not cover is the one I have. Where a condition is well controlled and where it is not are different questions and the…
Gallbladder disease risk with rapid weight loss Replied, post #15 · Clinical › Comorbidities · 2 Oct 2024 · 3 likes Coming back to post #14, because the follow-up matters more than the original answer. Bariatric surgery history: altered anatomy after surgery affects absorption. That…
Correlation in a self-tracked dataset: what it can support Replied, post #52 · Research Methods › Statistics · 22 Aug 2024 · 2 likes Quietly grateful for the plain phrasing. Not every thread gets that.
What a stability-indicating method is and how you demonstrate one — one year on Replied, post #15 · Analytics › Method validation · 13 Aug 2024 · 0 likes Robustness testing deliberately varies the parameters most likely to drift — organic percentage, pH, temperature, flow — and shows the result does not. It is the part…
Coming back to: Purity assay versus content assay: two different numbers Replied, post #16 · Analytics › COA interpretation · 8 Aug 2024 · 9 likes I would be cautious about generalising from the Purity assay versus content assay example above. It is a good example. It is one example.
How this community labels and discusses unrefereed work Replied, post #93 · Evidence › Preprints · 18 Jul 2024 · 0 likes Community labels is a question about a distribution, not about a value, and treating it as a value is what produces the confident wrong answers.
Second pass at: Retatrutide dose escalation in the published trials Replied, post #8 · Compounds › Retatrutide · 15 Jul 2024 · 0 likes What would change my mind on Retatrutide dose escalation is a second dataset collected by someone with no stake in the first. Until then I hold it loosely and I would…
Second pass at: A field-by-field walk through a certificate of analysis Replied, post #5 · Analytics › COA interpretation · 13 Jul 2024 · 18 likes Answering the question the opening post raises rather than the one it answers. My position on field-by-field walk through a certificate is current rather than settled.…
Follow-up: A partial dose because the pen emptied mid-injection Replied, post #4 · Practice › Administration · 1 Jul 2024 · 31 likes Partial dose because the pen would be much easier to settle if anyone reported the denominator. Almost nobody reports the denominator.
Relative retention time as a better inter-laboratory comparator — does this still hold? Started this topic · Analytics › Method validation · 14 Jun 2024 · 0 likes Relative retention time as a better inter-laboratory comparator — does this still hold? I have a specific reason for asking rather than idle curiosity, and the context…