y.rahimi

TL2 · Nairobi

Contributes reviews on supplier material. Based in Nairobi.

Joined 7 September 2025 · last posted 13h

75 posts, newest first. Showing up to 150.

[2026 update] Antibiotics and a course of something with delayed emptying Replied, post #98 · Practice › Interactions · 27 Jul 2026 · 14 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 structured critique template this community uses — a second dataset Replied, post #51 · Evidence › Study critique · 26 Jul 2026 · 1 like Post #47 describes the usual case. This is about the unusual one. A critique should end with what would change your mind. Without that it is a position rather than an…
Second pass at: Which categories are strict and which are relaxed, honestly Replied, post #100 · Start Here › Welcome · 25 Jul 2026 · 2 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…
Ultrasound and skinfolds: operator dependence in practice Replied, post #65 · Outcomes › Body composition · 19 Jul 2026 · 0 likes Worth separating two things that post #63 runs together. Ultrasound: thickness of subcutaneous fat at specific sites. Less standardised than DXA and operator-dependent.…
Aggregate verification data across the directory, with caveats Replied, post #54 · Sourcing › Independent verification · 18 Jul 2026 · 3 likes Confirming post #51 from a second method, which matters more than confirming it from a second person. The honest answer on aggregate verification data is that it…
Publication patterns in the BPC-157 literature, examined Replied, post #38 · Compounds › Repair & healing peptides · 17 Jul 2026 · 8 likes Post #35 answers the question as asked. The question underneath it is different. The question underneath publication patterns is usually "how would I tell?" rather than…
Alcohol: what is documented and what is folklore Replied, post #104 · Practice › Interactions · 10 Jul 2026 · 5 likes SGLT2 inhibitors: frequently co-administered and relevant to renal and cardiovascular discussion, not to interactions. There is no pharmacokinetic interaction of…
What a reversed-phase purity number actually is Replied, post #35 · Analytics › HPLC & UHPLC · 8 Jul 2026 · 10 likes Fair, and the limits you put on it are the part I will remember.
[2026 update] Interpreting a result that disagrees with the supplier's certificate Replied, post #71 · Sourcing › Independent verification · 7 Jul 2026 · 0 likes I think the Interpreting a result question is answerable and has not been answered, which is a more optimistic position than most of this thread.
Coming back to: Lateral-flow and colorimetric approaches: the specificity problem Replied, post #58 · Analytics › Home & field testing · 26 Jun 2026 · 33 likes Documenting home checks with dates and lots makes them accumulate into something. Undocumented ones evaporate and get remembered selectively.
Request: a per-category review queue Replied, post #53 · Meta › Feature requests · 22 Jun 2026 · 14 likes Small request: let me filter Latest by whether I have read the topic. Unread exists as a tab and does not combine with anything else, so a busy category is either all…
Why fasting instructions for oral semaglutide are not optional advice Replied, post #22 · Compounds › Oral incretins · 31 May 2026 · 6 likes The gastrointestinal tolerability profile of the oral formulation is broadly similar in character to the injectable, which supports the effects being systemic rather…
Revisiting: Mean kinetic temperature explained without the mathematics Replied, post #6 · Practice › Storage & stability · 29 May 2026 · 26 likes Building on post #5 rather than restating it. Visible particulate is a strong signal in the other direction: it is a reason to stop and ask rather than to filter and…
A parcel stationary at a customs facility for nine days Replied, post #63 · Sourcing › Logistics · 25 May 2026 · 19 likes This settles it for me, at least until somebody posts a reason it should not.
Tracking a shortage from primary sources rather than rumour Replied, post #19 · Access › Shortages · 23 May 2026 · 3 likes Adding the measurement that post #16 says would settle it. Switching presentation or strength during a shortage is a prescribing decision rather than a substitution…
Personal import allowances, compared — a second dataset Replied, post #125 · Access › International · 18 May 2026 · 0 likes The claim about Personal import allowances upthread is stronger than its source supports. I have read the source. The source says "associated with" and the post says…
A 10 mg vial reconstituted three different ways, compared Replied, post #19 · Practice › Reconstitution · 10 May 2026 · 23 likes Add the diluent down the side of the vial rather than directly onto the cake. It is slower and it avoids the foaming that makes people think something has gone wrong.
Reading a home test result without over-claiming Replied, post #29 · Analytics › Home & field testing · 2 May 2026 · 4 likes Clear enough that I do not think I have a follow-up, which is unusual.
Type 2 diabetes and the largest part of the evidence base Replied, post #72 · Clinical › Comorbidities · 17 Apr 2026 · 17 likes Bariatric surgery history: altered anatomy after surgery affects absorption. That matters for oral medications and for reconstituted solutions. Discussing specific…
Reconstitution volumes that produce round numbers, tabulated Replied, post #92 · Practice › Reconstitution · 16 Apr 2026 · 8 likes Reconstitution volumes is a good example of a question where the honest answer is boring and the interesting answers are unsupported. I would go with boring.
Adducts: sodium, potassium, and the peak you did not expect — does this still hold? Replied, post #99 · Analytics › Mass spectrometry · 7 Apr 2026 · 8 likes The useful distinction on Adducts is between what was measured and what was inferred from it. Both end up in the same sentence and only one of them has error bars.
Micro-titration: a disputed topic, argued properly — one year on Replied, post #18 · Practice › Dosing & titration · 28 Mar 2026 · 11 likes Escalating before steady state means you are judging a dose you have not yet fully experienced. That is the whole argument against compressing the schedule and it is a…
Half-life, steady state, and accumulation worked through — a second dataset Replied, post #114 · Pharmacology › Pharmacokinetics · 24 Mar 2026 · 9 likes Where the Half-life discussion usually stalls is that nobody wants to say "I do not know" and everyone is willing to say "it varies". Those are the same sentence with…
Coming back to: What the published dose-response for semaglutide actually looks like… Replied, post #14 · Compounds › Semaglutide · 22 Mar 2026 · 0 likes Research-use-only semaglutide is not a licensed medicine, is not manufactured to pharmaceutical standards, and is not approved for human use. That is a statement about…
Why a compound being unapproved is not the same as being illegal to possess Replied, post #70 · Sourcing › Regulatory · 21 Mar 2026 · 24 likes Research-use-only status is a legal classification, not a safety classification. It means the compound is sold for laboratory use and not for human consumption. The…
Why semaglutide's albumin binding is the whole reason weekly dosing works Replied, post #3 · marked as the solution · Compounds › Semaglutide · 4 Mar 2026 · 14 likes The C-cell question: semaglutide triggered medullary thyroid carcinoma in rodent toxicology studies. A signal in rodents does not automatically appear in humans, but it…
[2026 update] A rising related-substance total over six months: degradation or method… Replied, post #63 · Analytics › Impurities & related substances · 18 Feb 2026 · 18 likes Grateful for the specificity. Vague answers to this question are what sent me looking.
Second pass at: Pregnancy and pregnancy planning: contraindication and washout Replied, post #34 · Clinical › Special populations · 22 Jan 2026 · 29 likes Agreed on Pregnancy and pregnancy planning, with one qualification that I think matters. The reasoning holds for the case as described. Change the starting assumption…
A plateau that disappeared when I changed how I measured — the long version Started this topic · Outcomes › Progress reports · 11 Jan 2026 · 53 likes A plateau that disappeared when I changed how I measured — the long version — setting out what I have, and where I think it stops being reliable. A narrow question…
Substitution between formats during a shortage Replied, post #121 · Access › Shortages · 22 Dec 2025 · 0 likes Where I have landed on substitution between formats, having got it wrong once in public: the direction is clear, the magnitude is not, and anyone quoting a precise…
About the Statistics category Replied, post #9 · Research Methods › Statistics · 17 Dec 2025 · 24 likes Narrowing post #8, because the general version has more than one answer. Bayesian and frequentist analyses answer different questions and both are legitimate. What…
Second pass at: What "verified" means on our vendor pages, stated narrowly Replied, post #37 · Sourcing › Vendor reports · 21 Nov 2025 · 30 likes Photograph the vial and the label before opening. It costs ten seconds and it is what turns a report into something checkable. Worth checking against a second source…
Where to report an adverse event officially, by region — a second dataset Replied, post #54 · Safety › Adverse events · 25 Oct 2025 · 12 likes The published trial rates come from supervised populations on defined schedules and are not comparable to rates derived from who chooses to post.
Half-life, steady state, and accumulation worked through — a second dataset Replied, post #7 · Pharmacology › Pharmacokinetics · 21 Oct 2025 · 32 likes This is the answer, and the reason it is the answer is the more useful part.
Follow-up: The lowest dose that does anything: is that a real question? Replied, post #65 · Practice › Dosing & titration · 19 Oct 2025 · 24 likes Nothing here is medical advice, and a titration question is one of the few where a prescriber can genuinely answer in a minute what a thread will take a week to circle.
Payment mechanics and the recovery options that do not exist Replied, post #17 · Sourcing › Payments · 19 Oct 2025 · 0 likes Before the thread moves on from payment mechanics — what is the sample size behind the claim? I am not being difficult; I have seen the same figure quoted from an n of…
What a 2 ppm match establishes, and what it does not Replied, post #57 · Analytics › Mass spectrometry · 6 Oct 2025 · 0 likes Coming back to post #53, because the follow-up matters more than the original answer. An observation about 2 ppm match that I cannot explain and am posting anyway, on…
Temperature loggers worth the money — the long version Replied, post #45 · Devices › Cold chain · 24 Sep 2025 · 16 likes Reading rather than contributing, but this is the most useful thread I have found on it.
Revisiting: German, French and Dutch differences, compared Replied, post #70 · Regional › European Union · 9 Sep 2025 · 0 likes Two people in this thread mean different things by German and are disagreeing about the definition while believing they are disagreeing about the facts. Worth pausing…
How to read a forest plot, properly, from scratch Replied, post #25 · Evidence › Trials · 8 Sep 2025 · 0 likes Post #23 and I disagree about the size of the effect, not about the direction. Absolute numbers, not just relative: a 30% relative reduction tells you the ratio but not…
Second pass at: Why this subcategory is stricter about sourcing than most Replied, post #128 · Compounds › Secretagogues & GH axis · 3 Sep 2025 · 17 likes On post #126 — agreed on the reasoning, with one qualification. Effects reported at the level of appetite are the most consistently described and the most…
[2026 update] Journal club: is percentage weight change the right endpoint? Replied, post #105 · Evidence › Journal club · 24 Aug 2025 · 6 likes Coming back to post #101, because the follow-up matters more than the original answer. Sessions on negative or null results are consistently the most instructive and…
A comparison of home results against a laboratory result on the same vial Replied, post #22 · Analytics › Home & field testing · 7 Aug 2025 · 0 likes I had written a reply contradicting post #21 and deleted it. Here is what survived. A home refractometer is not measuring what people hope it is measuring in these…
Managing an unplanned gap in supply — what changed since Replied, post #31 · Access › Shortages · 5 Aug 2025 · 2 likes Resuming after a gap: after a gap of days or a few weeks, most people resume at the dose they were on when they stopped. Gaps of months might require retitration…
A checklist for reading a certificate in under two minutes — does this still hold? Replied, post #27 · Analytics › COA interpretation · 28 Jul 2025 · 14 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…
Publishing an inconvenient result: a case study Replied, post #49 · Sourcing › Independent verification · 14 Jul 2025 · 13 likes Confirming post #46 from a second method, which matters more than confirming it from a second person. What I want from this publishing an inconvenient result thread is…
Revisiting: Early satiety becoming a problem rather than a benefit Started this topic · Practice › Side effects · 8 Jul 2025 · 29 likes On the subject in the title: Revisiting: Early satiety becoming a problem rather than a benefit Working notes rather than a conclusion. Early satiety: setting out the…
Reading a regulatory notice rather than an article about it — what changed since Replied, post #32 · Sourcing › Regulatory · 2 Jul 2025 · 4 likes Date every claim in this subcategory. A regulatory position stated without a date is worse than no claim, because it will be read as current indefinitely.
Insulin combinations and hypoglycaemia risk Replied, post #21 · Practice › Interactions · 26 Jun 2025 · 11 likes Renal or hepatic impairment changes the calculus for a lot of combinations and is the context most often missing from an interaction question here. Old habit: I write…
Reading a supplier's product description as a marketing document Replied, post #31 · Compounds › Other compounds · 8 Jun 2025 · 2 likes Reading a supplier's product description as a marketing document: that is exactly what it is. The hyperbole, the mechanism written as fact, the theoretical benefits…
Hepatic steatosis: what the MASH trial evidence supports Replied, post #51 · Clinical › Comorbidities · 28 May 2025 · 1 like Source for the hepatic steatosis figure, since it was asked for. It is in the discussion rather than the abstract, which is why the version circulating is stronger than…
Amylin analogue mechanism: satiety signalling separate from GLP-1 Replied, post #107 · Compounds › Cagrilintide & amylin analogues · 30 Apr 2025 · 13 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. Happy…
Reading a trial's population section before its results — does this still hold? Replied, post #47 · Evidence › Trials · 28 Apr 2025 · 28 likes A treatment-policy estimand asks what happens to people assigned to a strategy, including those who abandon it. A hypothetical estimand asks what would have happened…
Coming back to: Sample size calculations, read backwards from the published number Replied, post #18 · Evidence › Trials · 28 Apr 2025 · 30 likes A treatment-policy estimand asks what happens to people assigned to a strategy, including those who abandon it. A hypothetical estimand asks what would have happened…
Asking about a compound your prescriber has not heard of Replied, post #13 · Clinical › Prescriber conversations · 8 Apr 2025 · 5 likes Building on post #11 rather than restating it. Written summaries after an appointment are available in many systems and are worth asking for, because recollection of a…
Delayed gastric emptying and oral medication absorption: which drugs matter Replied, post #37 · Practice › Interactions · 5 Apr 2025 · 4 likes Adding a note of thanks rather than an opinion. I did not know most of that.
Splitting a vial for two laboratories: how to do it without ruining both Replied, post #13 · Sourcing › Independent verification · 3 Apr 2025 · 2 likes How to submit a sample: contact the service directly. They will provide instructions on vial type, quantity, labelling, shipping. Following their instructions exactly…
Comparators chosen for regulatory reasons rather than clinical ones — one year on Replied, post #5 · Evidence › Trials · 2 Apr 2025 · 28 likes Pre-specification is the property that makes a primary endpoint trustworthy. An endpoint chosen after seeing the data can be the best endpoint in the world and it no…
Journal club: SURMOUNT-OSA and a hard endpoint in a soft field Replied, post #47 · Evidence › Journal club · 16 Mar 2025 · 7 likes SURMOUNT-OSA is a question about a distribution, not about a value, and treating it as a value is what produces the confident wrong answers.
Consistent declarations and why they matter more than clever ones Replied, post #131 · Sourcing › Logistics · 5 Mar 2025 · 2 likes I had read the opposite somewhere and cannot now find where, which tells me something.
Reconstituting a multi-strength kit without mixing yourself up Replied, post #40 · Practice › Reconstitution · 5 Mar 2025 · 13 likes Answering the question post #38 raises rather than the one it answers. The claim about reconstituting a multi-strength kit upthread is stronger than its source…
An orphaned page with no inbound links Replied, post #13 · Meta › Wiki maintenance · 1 Mar 2025 · 4 likes Orphaned pages: if a page has no incoming links and is not reachable from navigation, it is orphaned. Such pages should either be linked or deprecated.
Second pass at: Gauge and length selection for subcutaneous injection Replied, post #27 · Devices › Syringes & needles · 5 Feb 2025 · 0 likes Silicone coating on the barrel affects how smoothly the plunger moves and how a very slow injection feels. It is one reason two syringes at the same specification are…
[2026 update] Step therapy requirements and how to satisfy them Replied, post #104 · Access › Insurance & coverage · 4 Jan 2025 · 4 likes Where I part company with post #102, and it is a narrow parting. Before the thread moves on from Step therapy requirements — what is the sample size behind the claim? I…
What the published dose-response for semaglutide actually looks like above 2.4 mg — a… Replied, post #12 · Compounds › Semaglutide · 30 Dec 2024 · 4 likes Post #11 is the version of this I will quote in future. One addition. Albumin binding is not a unique structural feature and nothing in the class lacks it, but the…
Pancreatitis history and the risk calculus — a second dataset Replied, post #18 · Safety › Contraindications · 30 Dec 2024 · 0 likes Allergy to the specific compound: true allergy is rare but possible. Any prior allergic reaction to the same compound or to structurally similar peptides warrants…
Reading a preclinical wound-healing model and its relevance to a human tendon Replied, post #149 · Compounds › Repair & healing peptides · 26 Nov 2024 · 12 likes The pentadecapeptide sequence is short and stable enough to survive conditions that would degrade a larger peptide, which is one of the few things about it that is well…
Converting between mg/mL and units per dose, both directions Replied, post #99 · Practice › Reconstitution · 22 Nov 2024 · 7 likes Where I part company with post #97, and it is a narrow parting. Do not shake. Swirl, or leave it. Vigorous agitation introduces air and shear, and neither helps a…
Revisiting: Melanocortin agonists: mechanism and the documented adverse profile Replied, post #121 · Compounds › Other compounds · 16 Nov 2024 · 14 likes AOD-9604 is a fragment of human growth hormone and has been discussed as a potential weight-loss agent based on theoretical mechanism. The fragment hypothesis — that…
Second pass at: Buffers, pH and why a formulation is a formulation Replied, post #4 · Pharmacology › Formulation chemistry · 19 Oct 2024 · 0 likes Buffers and pH: the pH of a solution is buffered to maintain stability. The buffer system (phosphate, Tris, or other) is chosen to keep the solution at the pH where the…
Second pass at: Albumin binding and how it produces a long half-life Replied, post #5 · Pharmacology › Pharmacokinetics · 16 Oct 2024 · 7 likes Terminal half-life estimated from a short sampling window underestimates the true value. That is a common source of discrepant figures between sources.
Progressive overload when the scale is falling — one year on Replied, post #128 · Nutrition & Training › Resistance training · 6 Oct 2024 · 2 likes Anybody returning after a break should expect to start lower than they left, and expecting otherwise is where injuries come from.
Gallbladder disease risk with rapid weight loss Replied, post #5 · Clinical › Comorbidities · 30 Aug 2024 · 8 likes Post #4 answers the question as asked. The question underneath it is different. Practical answer on gallbladder disease risk, since the theoretical one is upthread: do…
Second pass at: Sodium, potassium and magnesium when intake drops Replied, post #45 · Nutrition & Training › Hydration & electrolytes · 17 Aug 2024 · 25 likes Sodium is one of those subjects where the general answer and the answer for a specific case diverge, and the thread will go in circles until someone says which one is…
Journal club: FLOW and the renal composite, component by component Replied, post #55 · Evidence › Journal club · 14 Jul 2024 · 0 likes FLOW (N Engl J Med 2024): Semaglutide renal outcomes in type 2 diabetes and chronic kidney disease. Stopped early for efficacy. Component-by-component analysis is…