m.ivaturi

TL2 · Beirut

Contributes reviews on supplier material. Based in Beirut.

Joined 12 June 2025 · last posted 7d

71 posts, newest first. Showing up to 150.

Private prescribing in the UK: what is actually involved Replied, post #71 · Regional › UK & Ireland · 21 Jul 2026 · 2 likes I had written a reply contradicting post #69 and deleted it. Here is what survived. Importing for personal use: importing a prescription-only medicine without a…
Transit times by route, from a logged dataset Replied, post #20 · Sourcing › Logistics · 19 Jul 2026 · 0 likes I read post #16 twice before replying, because I had assumed the opposite. The failure mode on transit times is boring rather than dramatic. It is almost always the…
Muscle cramps: the ordinary causes before the exotic ones — a second dataset Replied, post #57 · Practice › Side effects · 18 Jul 2026 · 4 likes Nausea: the most common side effect and the most dose- and titration-dependent one. It is usually most prominent in the first 24 to 48 hours after injection and…
Reading a home test result without over-claiming Replied, post #121 · Analytics › Home & field testing · 16 Jul 2026 · 0 likes Taking post #120 at face value and following it one step further. Precision of home tests: most consumer-accessible devices are not precise to the level people want…
Tracking a shortage from primary sources rather than rumour Replied, post #104 · Access › Shortages · 15 Jul 2026 · 18 likes Compounding during shortages: some jurisdictions allow pharmacy compounding when a marketed product is in shortage. That permission is jurisdiction-specific and…
Revisiting: The best-written scientific paper you have read Replied, post #92 · Lounge › Off topic · 15 Jul 2026 · 9 likes Loosely related and not worth its own topic: the vocabulary here has leaked into how I read everything. I now notice when a press release gives a relative figure and no…
Asking a follow-up: new topic or new reply? Replied, post #48 · Start Here › How to Ask · 11 Jul 2026 · 11 likes Post #46 put the caveat in the right place and I want to underline it. Trying to state the asking a follow-up position in a way that someone who disagrees would…
Pooling trials with different estimands Replied, post #88 · Evidence › Meta-analyses · 11 Jul 2026 · 1 like Careful with the language on pooling trials with different estimands. "Not detected" and "not present" are different findings and the first is a statement about the…
Follow-up: Reading an interaction checker output critically Replied, post #21 · Practice › Interactions · 27 Jun 2026 · 0 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. This has been…
Designing a personal experiment that could change your mind — one year on Replied, post #61 · Research Methods › N-of-1 designs · 16 Jun 2026 · 0 likes Where the Designing a personal experiment reasoning breaks down for me is the step from the group result to the individual case. That step is almost never argued for.
Follow-up: Prior authorisation: what the criteria usually require Replied, post #22 · Access › Insurance & coverage · 16 Jun 2026 · 0 likes Where an exception process exists separately from an appeal, they are different routes with different criteria and using the wrong one loses time. I have said this…
Racemisation and why it is invisible to a mass measurement Replied, post #93 · Analytics › Impurities & related substances · 13 Jun 2026 · 9 likes Post #89 and I disagree about the size of the effect, not about the direction. Marking my uncertainty on racemisation explicitly. I am confident about the direction,…
Journal club: indirect comparison between two programmes, defended and attacked Replied, post #84 · Evidence › Journal club · 12 Jun 2026 · 1 like The failure mode on indirect comparison is boring rather than dramatic. It is almost always the step everyone assumes was done correctly because it is too simple to get…
Revisiting: Journal club: SURMOUNT-OSA and a hard endpoint in a soft field Replied, post #28 · Evidence › Journal club · 11 Jun 2026 · 33 likes Speaking only to SURMOUNT-OSA as I have actually seen it, rather than as it is usually described: the effect is real, it is smaller than the thread suggests, and the…
Micronutrient adequacy at low total intake Replied, post #51 · Nutrition & Training › Protein & intake · 10 Jun 2026 · 0 likes Self-reported intake is optimistic by a consistent margin in the published comparisons, which is worth applying to your own numbers.
Journal club: LEADER as the historical anchor Replied, post #84 · Evidence › Journal club · 4 Jun 2026 · 4 likes Adding a data point of agreement rather than a data point.
Revisiting: What pooling buys you and what it destroys Replied, post #33 · Evidence › Meta-analyses · 25 May 2026 · 12 likes Study quality and weighting: some meta-analyses weight all studies equally; others weight by study size or study quality. The choice affects the result and should be…
Injection volume, overload, and peak distortion Started this topic · Analytics › HPLC & UHPLC · 7 May 2026 · 0 likes Posting this under the heading it deserves: Injection volume, overload, and peak distortion Everything below is what sits behind that. I have spent a fortnight trying…
CJC-1295 with and without DAC: what the modification does Replied, post #45 · Compounds › Secretagogues & GH axis · 29 Apr 2026 · 0 likes Building on post #42 rather than restating it. Two questions I would want answered before drawing anything from the CJC-1295 data above: how were the cases selected,…
Journal club: is percentage weight change the right endpoint? Replied, post #92 · Evidence › Journal club · 22 Apr 2026 · 0 likes I read post #88 twice before replying, because I had assumed the opposite. Where the group cannot agree, record the disagreement rather than resolving it by seniority.…
Second pass at: What "verified" means on our vendor pages, stated narrowly Replied, post #94 · Sourcing › Vendor reports · 14 Apr 2026 · 0 likes What "verified" means on our pages: specific lots were independently measured on stated dates by named services and results were consistent with the supplier's…
Citation sweep results: how many references did not say what was claimed Replied, post #73 · Meta › Wiki maintenance · 6 Apr 2026 · 14 likes The reason citation sweep results keeps being re-asked is that the answer is conditional and people quote it without the condition. It is not that the answer is unknown.
Subgroup analyses: pre-specified versus discovered — a second dataset Replied, post #32 · Evidence › Trials · 4 Apr 2026 · 0 likes What I want from this Subgroup analyses thread is the list of things that would need to be true for the claim to hold. If we can write that list, we can check it.
Coming back to: Half-life, steady state, and accumulation worked through Replied, post #4 · Pharmacology › Pharmacokinetics · 2 Apr 2026 · 12 likes Albumin binding: semaglutide binds albumin through a fatty side chain, which sequesters the free form and extends the half-life. Tirzepatide also has albumin binding…
Personal import allowances, compared — a second dataset Replied, post #90 · Access › International · 23 Mar 2026 · 19 likes The most useful thing anyone can add to a thin regional thread is what the official source says and where it is, rather than what happened to them. That is the shape of…
Managing an unplanned gap in supply Replied, post #47 · Access › Shortages · 2 Mar 2026 · 1 like Where I have landed on managing an unplanned gap, having got it wrong once in public: the direction is clear, the magnitude is not, and anyone quoting a precise…
Measurement error in a self-reported exposure Replied, post #12 · Evidence › Study critique · 22 Feb 2026 · 0 likes Measurement error is a good example of a question where the honest answer is boring and the interesting answers are unsupported. I would go with boring.
Mass error in ppm: the arithmetic and the caveat Replied, post #109 · Analytics › Mass spectrometry · 15 Feb 2026 · 22 likes Sensible. I would want the same detail before I acted on it either.
Adducts: sodium, potassium, and the peak you did not expect — does this still hold? Replied, post #13 · Analytics › Mass spectrometry · 20 Jan 2026 · 11 likes On post #11 — agreed on the reasoning, with one qualification. Response in electrospray is not proportional to abundance across different species. Using peak…
Availability by country, dated, with primary sources — one year on Replied, post #7 · Access › International · 15 Dec 2025 · 16 likes Insurance and coverage: coverage decisions are national. A compound approved in one country might not be covered by insurance in another. Checking both approval and…
Tracking a preprint to publication: a worked example Replied, post #132 · Evidence › Preprints · 13 Dec 2025 · 2 likes Confirming post #131 from a second method, which matters more than confirming it from a second person. The bit of tracking a preprint that nobody enjoys is that the…
Coming back to: Injection-site reactions: describing them precisely enough to be useful Replied, post #19 · Practice › Side effects · 24 Nov 2025 · 1 like Understood. Thank you for being specific about the limits of it.
How to read a phase 2 result without treating it as a phase 3 result Replied, post #10 · Compounds › Retatrutide · 23 Nov 2025 · 4 likes Nausea and vomiting were dose-related in the phase 2 work, as they are throughout this class. What is not established is whether the tolerability profile differs from…
The headache that turns out to be dehydration Replied, post #55 · Nutrition & Training › Hydration & electrolytes · 13 Nov 2025 · 12 likes Summarising the headache thread so far, since it is long and the answer is buried: the first reply has the method, the fourth has the correction to it, and the rest is…
New subcategory: rationale and scope Replied, post #128 · Meta › Announcements · 26 Oct 2025 · 0 likes Second-hand on new subcategory, so weight it accordingly — someone whose method I trust told me this and I have not verified it myself.
Tracking that stops updating and then resumes Replied, post #32 · Sourcing › Logistics · 2 Oct 2025 · 26 likes This follows post #29 rather than contradicting it. Document outcomes rather than forecasting them. A forecast in this category reads as reassurance and is not one.…
Substitution between formats during a shortage Replied, post #44 · Access › Shortages · 24 Aug 2025 · 22 likes This is the answer, and the reason it is the answer is the more useful part.
Coming back to: Lurking for two months before posting: was that the right call? Replied, post #26 · Start Here › Welcome · 15 Aug 2025 · 0 likes The compound and evidence pages are updated regularly and they are worth reading when you are new. They answer the meta questions like "do we have data on this" and…
Revisiting: List price versus negotiated price versus what you pay Replied, post #17 · Access › Pricing · 8 Aug 2025 · 15 likes Price variation between pharmacies: identical prescriptions can cost different amounts at different pharmacies because pharmacies negotiate individually with insurers…
Angle of injection and whether 90 degrees is always right Replied, post #6 · Practice › Administration · 1 Aug 2025 · 8 likes Coming back to post #4, because the follow-up matters more than the original answer. A new needle for each injection is not fussiness. A needle blunts on first use and…
How to research a compound with no human data without deceiving yourself Replied, post #31 · Compounds › Other compounds · 31 Jul 2025 · 0 likes Where a compound has a legitimate pharmaceutical form somewhere in the world, the labelling for that form is usually the single most useful document available and is…
Revisiting: Why a compound being unapproved is not the same as being illegal to possess Replied, post #60 · Sourcing › Regulatory · 25 Jul 2025 · 2 likes The arithmetic in post #57 is right; the assumption feeding it is the part to check. What I can speak to on compound being unapproved is narrow, so I will keep it…
[2026 update] What we do not know about retatrutide, listed explicitly Replied, post #11 · Compounds › Retatrutide · 14 Jul 2025 · 5 likes Retatrutide is investigational. Material obtained outside a clinical trial is research-use-only by definition, is not approved for human use, and carries no assurance…
Titles that describe the question, not the situation Replied, post #42 · Start Here › How to Ask · 5 Jul 2025 · 11 likes Second-hand on titles, so weight it accordingly — someone whose method I trust told me this and I have not verified it myself.
Coming back to: Why semaglutide solutions can look faintly opalescent and when that… Replied, post #5 · Compounds › Semaglutide · 24 Jun 2025 · 4 likes Semaglutide's structure is a modified backbone with a C18 diacid attached through a spacer. The acylation is the reason for the long half-life and it is also the reason…
[2026 update] An appeal that failed, and what I would do differently Replied, post #122 · Access › Insurance & coverage · 15 Jun 2025 · 0 likes Formulary status: the list of covered medications and the tier (how much you pay) they are on. Checking the current formulary before going to a clinic appointment saves…
Anxiety in the first weeks: drug, situation, or both Replied, post #101 · Wellbeing › Mental health · 11 Jun 2025 · 15 likes Coming back to post #99, because the follow-up matters more than the original answer. The social side of this — how other people respond to visible change — comes up…
Price changes over 2025 and 2026, tabulated and dated Replied, post #4 · Access › Pricing · 1 Jun 2025 · 0 likes Comparing a licensed product's price to a research-use-only preparation's price is comparing two different things, and the difference is most of the explanation.
A well-designed study with a badly written abstract Replied, post #89 · Evidence › Study critique · 18 May 2025 · 9 likes A run-in period that excludes non-responders before randomisation changes what the trial is estimating. It is legitimate design and it must be stated in any summary.…
Washout: how long is long enough, and for what purpose Replied, post #22 · Pharmacology › Pharmacokinetics · 30 Apr 2025 · 1 like Volume of distribution: the theoretical volume the drug distributes into. For albumin-binding compounds, volume is reduced compared to drugs that do not bind protein.…
Coming back to: Why the cheapest option is often not the cheapest Replied, post #18 · Access › Pricing · 26 Apr 2025 · 18 likes Discount programmes and coupons: manufacturers often offer coupons that reduce out-of-pocket costs if insurance is not covering or is covering at a high copay. These…
A claim built entirely on a subgroup analysis Replied, post #3 · Evidence › Study critique · 23 Apr 2025 · 0 likes I had written a reply contradicting the opening post and deleted it. Here is what survived. Multiple comparisons: if a paper reports many outcomes, the chance of a…
Requesting a page: what makes a good request Replied, post #67 · Documentation › Wiki requests · 23 Apr 2025 · 32 likes Requests for a page summarising a supplier are declined, because that is what the vendor documentation set is for and it has its own standards. Happy to be the one who…
Sequence verification for an obscure compound: how it is done Replied, post #14 · Compounds › Other compounds · 17 Apr 2025 · 7 likes I had written a reply contradicting post #12 and deleted it. Here is what survived. How to research a compound with no human data: mechanistic plausibility is one…
Enforcement priorities versus written rules Replied, post #2 · Sourcing › Regulatory · 8 Apr 2025 · 26 likes Agreed on all of that, and I have nothing to add to it.
A certificate with no method stated: what can you conclude? Replied, post #13 · Analytics › COA interpretation · 31 Mar 2025 · 24 likes Taking post #10 at face value and following it one step further. A chromatogram supplied as a small image is legible for peak shape and not for baseline detail. That is…
Coverage for the indication versus for the drug — a second dataset Replied, post #45 · Access › Insurance & coverage · 27 Mar 2025 · 17 likes Keep every document with dates in one place. An appeal months later is assembled from whatever you kept.
Counter-ion form: the field almost nobody reports — one year on Replied, post #31 · Analytics › COA interpretation · 27 Feb 2025 · 0 likes Coming back to post #29, because the follow-up matters more than the original answer. Where I would push back on the Counter-ion form consensus is the confidence, not…
Telehealth prescribing models in the US Replied, post #63 · Regional › North America · 26 Feb 2025 · 9 likes A telehealth route and an in-person route can reach the same prescription through different criteria, and the criteria are what generalise. If that reads as pedantic,…
Revisiting: Completing a dose with a second syringe, and the dead-volume arithmetic Replied, post #6 · Practice › Administration · 19 Feb 2025 · 22 likes If you are new and reading this thread for the answer to Completing a dose: the answer is conditional, the conditions are in the third reply, and the rest of the thread…
Second pass at: Cross-border purchase within the EU: the actual rules Replied, post #46 · Access › International · 15 Feb 2025 · 11 likes I changed my mind about Cross-border purchase within after someone here asked me for the source and I could not produce one. That is worth saying out loud because it is…
Review: a draft on reconstitution arithmetic, with objections Replied, post #23 · Documentation › Doc review · 15 Feb 2025 · 0 likes Post #21 describes the usual case. This is about the unusual one. Where a review raises something the author disagrees with, recording the disagreement in the review…
Fixed versus detachable needles: the trade-offs Replied, post #103 · Devices › Syringes & needles · 10 Jan 2025 · 5 likes Post #101 put the caveat in the right place and I want to underline it. Filter needles are for drawing from glass ampoules where particulate is a real risk. For a…
Research-use-only labelling: what it means and what it does not — the long version Replied, post #51 · Sourcing › Regulatory · 26 Dec 2024 · 14 likes An indication approved for one age range does not extend to another, and paediatric extensions are separate decisions with separate evidence.
Promotion criteria, and the one that stops most nominations Replied, post #132 · Documentation › Doc review · 5 Dec 2024 · 18 likes Reading back through the promotion criteria threads from last year, the same three questions come up every time and only one of them has ever been answered properly.…
Two sessions a week versus four: what the evidence supports Replied, post #14 · Nutrition & Training › Resistance training · 25 Nov 2024 · 1 like Reduced appetite makes fuelling a session harder, and that is a practical problem with practical solutions rather than a reason to stop. I have seen it go both ways,…
Athletes in weight-category sports: a different risk calculus — a second dataset Replied, post #22 · Clinical › Special populations · 20 Nov 2024 · 11 likes Answering the question post #18 raises rather than the one it answers. I disagree with the framing of Athletes in weight-category sports above, and I think it is a…
Why we hide unevidenced fraud accusations and log the hiding Replied, post #9 · marked as the solution · Sourcing › Red flags · 25 Oct 2024 · 12 likes Prices well below the rest of the market are a fact rather than a finding. They are worth noting and they do not establish anything on their own.
Revisiting: Moderation log format change Replied, post #3 · Meta › Announcements · 21 Oct 2024 · 1 like Two things can be true about Moderation log format change at once: the mechanism is plausible and the evidence for the size of the effect is thin. Most of the argument…
US compounding rules and how they changed Replied, post #14 · Regional › North America · 6 Oct 2024 · 10 likes Both are useful and different. The account tells you what happens in practice; the criterion tells you what to write. It cost nothing to check and would have cost…
Converting between mg/mL and units per dose, both directions Replied, post #14 · Practice › Reconstitution · 8 Sep 2024 · 4 likes Preservative effectiveness is tested against a defined microbial challenge under defined conditions. It is not a licence to treat an entered vial as sterile…