p.diallo

TL2 · Uppsala

Contributes reviews on supplier material. Based in Uppsala.

Joined 21 January 2025 · last posted 3d

88 posts, newest first. Showing up to 150.

Seven-day rolling means and why weekly readings mislead Replied, post #104 · Outcomes › Progress reports · 25 Jul 2026 · 0 likes Agreed, and I will stop repeating the version of this I had been repeating.
What consumer-accessible tests can and cannot determine — a second dataset Replied, post #119 · Analytics › Home & field testing · 24 Jul 2026 · 0 likes Post #117 put the caveat in the right place and I want to underline it. On consumer-accessible tests, I would rather understate and be corrected upward than overstate…
What a reversed-phase purity number actually is Replied, post #86 · Analytics › HPLC & UHPLC · 23 Jul 2026 · 0 likes Post #84 answers the question as asked. The question underneath it is different. System suitability is not paperwork. If the replicate injections failed, the run did…
What a certificate commits its issuer to Replied, post #78 · Analytics › COA interpretation · 22 Jul 2026 · 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.
Coming back to: A structured critique template this community uses Replied, post #63 · Evidence › Study critique · 19 Jul 2026 · 0 likes Filing a mild objection to the consensus on structured critique template. Mild because I might be wrong; an objection because nobody has addressed the case that does…
Aggregate verification data across the directory, with caveats Replied, post #50 · Sourcing › Independent verification · 16 Jul 2026 · 1 like I read post #48 twice before replying, because I had assumed the opposite. The record shows what was measured. Everything beyond that is inference and this site tries…
Follow-up: Search filters: what is missing Replied, post #139 · Meta › Site feedback · 25 Jun 2026 · 1 like Thank you for the correction. I would rather find out here than later.
Forced degradation studies: designing one that is informative Replied, post #83 · Analytics › Method validation · 24 Jun 2026 · 24 likes Narrowing post #80, because the general version has more than one answer. Specificity: the method can distinguish the intended compound from related impurities and…
Revisiting: What pooling buys you and what it destroys Replied, post #64 · Evidence › Meta-analyses · 22 Jun 2026 · 18 likes Individual participant data pooling is a much stronger design than aggregate pooling and is rare because it requires cooperation rather than a search.
What I would want from a home test that does not exist yet — what changed since Replied, post #49 · Analytics › Home & field testing · 10 Jun 2026 · 0 likes The arithmetic in post #46 is right; the assumption feeding it is the part to check. A test that gives a yes or no on the presence of peptide bonds is answering a…
A widely repeated interaction claim that turns out to be unsupported — what changed since Replied, post #60 · Practice › Interactions · 8 Jun 2026 · 0 likes Insulin and sulfonylureas are the interaction that the labelling in this class flags most explicitly, because the risk is additive glucose lowering. That is a…
A reconstituted vial's beyond-use date and the reasoning behind common figures Replied, post #62 · Practice › Storage & stability · 6 Jun 2026 · 0 likes Where I part company with post #60, and it is a narrow parting. Vial integrity: once a vial is entered with a needle repeatedly, the rubber closure degrades and the…
A calculator that gives a right answer to the wrong question Replied, post #25 · Data & Tools › Calculators · 3 Jun 2026 · 3 likes Reconstitution calculator: enter vial mass, final volume target, and the calculator tells you concentration and syringe mark for a given dose. Useful for…
An appeal that succeeded, with the letter structure — the long version Replied, post #25 · Access › Insurance & coverage · 28 May 2026 · 3 likes I read post #23 twice before replying, because I had assumed the opposite. Formulary status: the list of covered medications and the tier (how much you pay) they are…
Measurement error in home scales, with a worked standard deviation — the long version Replied, post #95 · Research Methods › Statistics · 4 May 2026 · 27 likes Relative risk and odds ratios: both compare the rate in one group to the rate in another. Relative risk is easier to understand. Odds ratios are standard in many…
The headache that turns out to be dehydration — the long version Replied, post #29 · Nutrition & Training › Hydration & electrolytes · 1 May 2026 · 6 likes Where a laboratory result exists, quoting it with the reference interval makes the discussion tractable. Without it the thread is guesswork. This has been discussed…
An 18-month record including the parts that went badly Replied, post #4 · Outcomes › Progress reports · 25 Apr 2026 · 0 likes Post #3 is right about the mechanism and I think understates the practical bit. Maintenance series are the ones this subcategory needs most and receives least. The…
Coming back to: Half-life, steady state, and accumulation worked through Replied, post #19 · Pharmacology › Pharmacokinetics · 17 Apr 2026 · 11 likes Half-life determines how quickly concentration approaches steady state and does not determine what the steady-state concentration is. Dose and clearance determine that.…
Why the titration planner refuses to produce a schedule below a floor Replied, post #62 · Data & Tools › Calculators · 16 Apr 2026 · 1 like Post #58 describes the usual case. This is about the unusual one. Reporting rather than recommending, on titration planner refuses. What happened is above. Whether it…
Journal club: indirect comparison between two programmes, defended and attacked Replied, post #29 · Evidence › Journal club · 12 Apr 2026 · 8 likes The number people quote for indirect comparison is a central estimate presented without its interval, and the interval is wide enough that the estimate is nearly…
[2026 update] What a purity-only report leaves out Replied, post #46 · Sourcing › Independent verification · 7 Mar 2026 · 0 likes Speaking only to purity-only 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…
Revisiting: Liver enzymes drifting down and what that usually means Replied, post #8 · Clinical › Bloodwork · 1 Mar 2026 · 3 likes Repeat before acting is standard practice for an isolated abnormal result on most analytes, and it is standard for a reason.
[2026 update] Regional warehouse stock versus direct despatch Replied, post #7 · Sourcing › Logistics · 26 Feb 2026 · 0 likes On post #5 — agreed on the reasoning, with one qualification. On Regional warehouse stock versus direct, the part that usually goes wrong is that the question is asked…
Coming back to: Reading a supplier's product description as a marketing document Replied, post #25 · Compounds › Other compounds · 15 Feb 2026 · 6 likes On post #22 — agreed on the reasoning, with one qualification. Thymosin alpha-1 has a regulatory history in several jurisdictions and a real clinical literature, which…
Interpreting a result that disagrees with the supplier's certificate Replied, post #114 · Sourcing › Independent verification · 8 Feb 2026 · 21 likes Blind sampling: submitting without the laboratory or seller knowing the source removes the two easiest ways for a result to be shaped: selective submission and…
[2026 update] Buffers, pH and why a formulation is a formulation Started this topic · Pharmacology › Formulation chemistry · 2 Feb 2026 · 35 likes Posting this under the heading it deserves: Buffers, pH and why a formulation is a formulation Everything below is what sits behind that. A formulation question rather…
What I would record differently if I started again — the long version Replied, post #25 · Outcomes › Progress reports · 28 Jan 2026 · 12 likes On post #21 — agreed on the reasoning, with one qualification. Plateaus and resets: if weight loss stalls and then resumes, that is ordinary. It is not evidence that…
A genuinely late dose: what the labelling says and what people do — what changed since Replied, post #14 · Practice › Administration · 23 Jan 2026 · 25 likes Post #10 put the caveat in the right place and I want to underline it. A site rotation scheme that actually works: abdomen, outer thigh, back of arm, outer hip. Rotate…
Run-in periods and the population they select Replied, post #54 · Evidence › Trials · 22 Jan 2026 · 31 likes Narrowing post #51, because the general version has more than one answer. Population narrowness: most trials in this class enrolled fairly specific groups. Baseline…
Pharmacy supply in the UK and the questions you will be asked Replied, post #14 · Regional › UK & Ireland · 19 Jan 2026 · 0 likes Narrowing post #11, because the general version has more than one answer. Importing for personal use: importing a prescription-only medicine without a prescription is…
A partial dose because the pen emptied mid-injection Replied, post #87 · Practice › Administration · 10 Jan 2026 · 1 like Coming back to post #83, because the follow-up matters more than the original answer. If you have to inject at a different time of day than usual, that is a much…
Second pass at: I joined for one answer and stayed for a year — what changed my mind Replied, post #2 · marked as the solution · Start Here › Welcome · 1 Jan 2026 · 17 likes On the reading order question specifically: start with the how-to-ask materials in this category, then read the one to three subcategories where your main questions…
Second pass at: What pooling buys you and what it destroys Replied, post #6 · Evidence › Meta-analyses · 1 Jan 2026 · 2 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…
Pen mechanics when the cartridge is nearly empty — does this still hold? Replied, post #35 · Devices › Pens & autoinjectors · 27 Dec 2025 · 4 likes Travel with a pen raises a cold-chain question and a documentation question. The second is the one people forget until an airport.
Common supplements people ask about, assessed one at a time — a second dataset Replied, post #24 · Practice › Interactions · 23 Dec 2025 · 0 likes Metformin: commonly co-administered and relevant to gastrointestinal tolerability. Gastrointestinal side effects can overlap and additive. Taking them separately or…
Interpreting a result that disagrees with the supplier's certificate Replied, post #49 · Sourcing › Independent verification · 20 Dec 2025 · 16 likes A supplier's own certificate is not independent. It can be posted, it is useful, and it is labelled for what it is. That has held every time I have looked, which is not…
A widely repeated interaction claim that turns out to be unsupported Replied, post #12 · Practice › Interactions · 16 Dec 2025 · 8 likes Post #11 is right about the mechanism and I think understates the practical bit. A supplement is a drug for interaction purposes, and the fact that it is sold without a…
The decimal-point error, and the habit that catches it Replied, post #65 · Practice › Reconstitution · 16 Dec 2025 · 12 likes Post #61 describes the usual case. This is about the unusual one. Where I have landed on decimal-point error, having got it wrong once in public: the direction is…
Persistent vomiting and the threshold for seeking help Replied, post #81 · Safety › Adverse events · 3 Dec 2025 · 0 likes What I would want before treating persistent vomiting as settled: the method, the sample, and whether anyone tried to find the opposite result. Two of the three are…
Appeal templates and why they are deliberately unemotional Replied, post #25 · Access › Insurance & coverage · 3 Dec 2025 · 0 likes Post #22 answers the question as asked. The question underneath it is different. On appeal templates, I would rather understate and be corrected upward than overstate…
[2026 update] What steady state means for the decision to escalate Replied, post #129 · Practice › Dosing & titration · 18 Nov 2025 · 0 likes The documentation on steady state is better than this thread and I say that as someone who has posted in the thread.
Follow-up: The decimal-point error, and the habit that catches it Replied, post #99 · Practice › Reconstitution · 15 Nov 2025 · 0 likes Coming back to post #96, because the follow-up matters more than the original answer. The most useful thing anyone has posted about decimal-point error in this category…
Non-inferiority margins: how they are chosen and how they are abused Replied, post #14 · Evidence › Trials · 12 Nov 2025 · 15 likes Post #12 is right about the mechanism and I think understates the practical bit. Absolute and relative effects answer different questions. Write down the event rate in…
Why an oral GLP-1 agonist is a formulation achievement more than a chemistry one Replied, post #39 · Compounds › Oral incretins · 11 Nov 2025 · 31 likes Why administration conditions matter for oral semaglutide and not for injectables: the oral formulation depends on a transient pH effect in the stomach. Anything that…
Tirzepatide and nausea: is the profile genuinely different or just differently reported? Replied, post #22 · Compounds › Tirzepatide · 11 Nov 2025 · 9 likes I had written a reply contradicting post #18 and deleted it. Here is what survived. A note on scope: what I am saying about tirzepatide and nausea applies to the case…
Stepping down deliberately, and how to do it without losing progress Replied, post #12 · Practice › Dosing & titration · 7 Nov 2025 · 30 likes Useful. I have added it to my own notes with the date on it.
Temperature loggers worth the money — the long version Replied, post #62 · Devices › Cold chain · 24 Oct 2025 · 0 likes Answering the question post #58 raises rather than the one it answers. A phase-change pack holds a defined temperature while it changes state and then behaves like…
Payment mechanics and the recovery options that do not exist Replied, post #38 · Sourcing › Payments · 20 Oct 2025 · 0 likes I read the earlier replies on payment mechanics twice before writing this, because I had assumed the opposite and wanted to be sure I was disagreeing with what was said…
New subcategory: rationale and scope Replied, post #70 · Meta › Announcements · 20 Oct 2025 · 33 likes New subcategory sits at the boundary between what this community can usefully discuss and what it cannot, and I think it falls on the discussable side, narrowly.
Compounds this community declines to help with, and why Replied, post #64 · Compounds › Other compounds · 5 Oct 2025 · 16 likes Several compounds discussed here have no published human pharmacokinetics at all. That means half-life claims in circulation were derived from an animal model or from…
Second pass at: The mass-error checker and its intended scope Replied, post #23 · Data & Tools › Calculators · 23 Sep 2025 · 11 likes Thank you for the correction. I would rather find out here than later.
Detection wavelength and why 214 nm and 280 nm disagree Replied, post #48 · Analytics › HPLC & UHPLC · 14 Sep 2025 · 0 likes Post #44 put the caveat in the right place and I want to underline it. An honest declaration on detection wavelength: I have a prior here and it is strong enough that…
The most useful thing you learned here that was not the answer you came for — a second… Replied, post #35 · Lounge › Off topic · 13 Sep 2025 · 13 likes Lounge question, no agenda: does anyone else keep a physical notebook for this rather than a file? Mine is more use than anything I have typed, and I cannot entirely…
When a preprint is the best available evidence and we say so Replied, post #139 · Evidence › Preprints · 4 Sep 2025 · 9 likes If you cite a preprint in a maintained document here, the convention is to label it in the sentence and to note the check date. The document review will catch the…
Are there stupid questions here? A staff answer, at length Replied, post #98 · Start Here › Welcome · 21 Aug 2025 · 2 likes Welcome. The orientation materials are pinned at the top of this category and they take about an hour. They answer most of the questions a new member has and they save…
Coming back to: Sample size calculations, read backwards from the published number Replied, post #77 · Evidence › Trials · 20 Aug 2025 · 6 likes No notes. Posting so the count is not one.
Revisiting: Reading a denial letter as a specification for your appeal Replied, post #83 · Access › Insurance & coverage · 17 Aug 2025 · 2 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…
Checking someone else's arithmetic: a worked example thread Replied, post #67 · Practice › Reconstitution · 14 Jul 2025 · 23 likes Do not shake. Swirl, or leave it. Vigorous agitation introduces air and shear, and neither helps a peptide go into solution any faster than patience does. It took me…
How to read a forest plot, properly, from scratch Replied, post #2 · Evidence › Trials · 1 Jul 2025 · 23 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),…
A report I filed that turned out to be wrong, and the correction Replied, post #111 · Sourcing › Vendor reports · 19 Jun 2025 · 0 likes Post #109 and I disagree about the size of the effect, not about the direction. Do not adjust a reported figure. Post what the laboratory said and put your…
Which panel is worth repeating and which is worth ignoring Replied, post #39 · Clinical › Bloodwork · 15 Jun 2025 · 32 likes Repeat before acting is standard practice for an isolated abnormal result on most analytes, and it is standard for a reason.
The CagriSema phase 2 paper and what a fixed combination buys — the long version Replied, post #22 · Compounds › Cagrilintide & amylin analogues · 5 Jun 2025 · 0 likes Narrowing post #21, because the general version has more than one answer. The honest summary of the evidence base: a coherent mechanism, good phase 2 data in…
Travel coolers and how long they really hold — the long version Replied, post #12 · Devices › Cold chain · 21 May 2025 · 17 likes A parcel sitting in a vehicle or a depot in a hot month is the excursion that matters and the one nobody sees. Delivery timing is part of the cold chain.
A 10 mg vial reconstituted three different ways, compared — the long version Replied, post #56 · Practice › Reconstitution · 21 May 2025 · 5 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…
Second pass at: A history of disordered eating: proceeding carefully Replied, post #51 · Wellbeing › Mental health · 15 May 2025 · 10 likes Eating-disorder history is raised here regularly and is the case where guidance most consistently recommends specialist involvement.
Adjudicated events and why the definition matters — the long version Replied, post #65 · Evidence › Trials · 25 Mar 2025 · 29 likes Answering the question post #61 raises rather than the one it answers. The reason Adjudicated events keeps being re-asked is that the answer is conditional and people…
Why cagrilintide alone is discussed so much less than in combination Replied, post #18 · Compounds › Cagrilintide & amylin analogues · 23 Mar 2025 · 27 likes Cagrilintide alone is discussed less than in combination because the published data is almost entirely from combination trials. The phase 2 combination data was…
Reading order for a first week here, and what to skip until later Replied, post #39 · Start Here › Welcome · 16 Mar 2025 · 5 likes The tag pages are usually a better entry point than the categories for a first read. A tag cuts across categories, so following one shows you how the same subject is…
Oxidation and deamidation mass shifts, tabulated Replied, post #71 · Analytics › Mass spectrometry · 13 Mar 2025 · 0 likes Helpful, and short, which on this subject is harder than long.
Why quantitation is the hard part, not detection Replied, post #7 · Analytics › Home & field testing · 12 Mar 2025 · 23 likes No disagreement from me. Posting only so the question does not look ignored.
Adducts: sodium, potassium, and the peak you did not expect Replied, post #32 · Analytics › Mass spectrometry · 11 Mar 2025 · 0 likes One caution on adducts: everything above assumes the underlying documentation is what it claims to be. That assumption is doing real work and is rarely stated.
Research-use-only status: what it means legally and practically — a second dataset Replied, post #109 · Compounds › Other compounds · 8 Mar 2025 · 4 likes Post #107 answers the question as asked. The question underneath it is different. Research-use-only status is a legal classification, not a safety classification. It…
Journal club: SURMOUNT-OSA and a hard endpoint in a soft field Replied, post #28 · Evidence › Journal club · 7 Mar 2025 · 10 likes Posting my SURMOUNT-OSA numbers with the method attached so they can be discounted properly. Uncontrolled, unblinded, and collected by someone who wanted a particular…
Charge states for a 4 kDa peptide, worked through Replied, post #6 · Analytics › Mass spectrometry · 2 Mar 2025 · 4 likes Post #4 describes the usual case. This is about the unusual one. Charge states looks different depending on whether you are reading the primary literature or the…
Research-use-only labelling: what it means and what it does not — the long version Replied, post #86 · Sourcing › Regulatory · 16 Feb 2025 · 25 likes On Research-use-only labelling the community has more anecdote than the confidence in this thread implies, and I include my own contribution in that.
Research-use-only status: what it means legally and practically — a second dataset Replied, post #91 · Compounds › Other compounds · 16 Feb 2025 · 8 likes Narrowing post #89, because the general version has more than one answer. Practical experience of Research-use-only status, offered as one case with the conditions…
Transit times by route, from a logged dataset — the long version Replied, post #58 · Sourcing › Logistics · 9 Feb 2025 · 0 likes Customs outcomes are not predictable at the level of an individual parcel. What is predictable is that consistent, accurate declarations correlate with fewer…
Second pass at: Regression to the mean in progress reports Replied, post #25 · Research Methods › Statistics · 15 Jan 2025 · 1 like 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. That is all…
Fixed versus detachable needles: the trade-offs Replied, post #68 · Devices › Syringes & needles · 24 Dec 2024 · 2 likes Post #64 put the caveat in the right place and I want to underline it. Fixed versus detachable needles: insulin syringes usually have fixed needles (no dead volume loss…
A page that has drifted out of date and needs a maintainer Replied, post #27 · Documentation › Wiki requests · 10 Nov 2024 · 0 likes Adding the measurement that post #24 says would settle it. Accessibility feedback: if you have trouble accessing or reading a maintained page (screen reader issues,…
Follow-up: Where the four-week escalation interval comes from, and what it is not Replied, post #87 · Practice › Dosing & titration · 20 Oct 2024 · 30 likes I had written a reply contradicting post #83 and deleted it. Here is what survived. Dose and effect are not linear across the studied range for every compound in this…
Follow-up: Tirzepatide's shorter half-life and its one practical consequence Replied, post #3 · Compounds › Tirzepatide · 19 Oct 2024 · 0 likes Gastrointestinal effects were comparable in character to the GLP-1 monoagonists across the programme. Individual reports here vary in both directions, which is what you…
Second pass at: Hoarding and why it makes a shortage worse Replied, post #72 · Access › Shortages · 11 Oct 2024 · 0 likes Reports that a pharmacy has stock are the least durable information on the site and are still worth posting with a date.
PIONEER 6 cardiovascular safety, read as a safety trial rather than an efficacy one —… Replied, post #19 · Compounds › Oral incretins · 9 Sep 2024 · 8 likes Missed doses behave differently for a daily oral than for a weekly injection. With a short interval you are near a trough rather than perturbing a slowly moving…
Follow-up: Dead volume across syringe and needle combinations Replied, post #28 · Devices › Syringes & needles · 30 Aug 2024 · 18 likes Needle length for subcutaneous delivery is a question about tissue depth and injection angle together. Short needles at ninety degrees and longer ones at an angle reach…
Second pass at: Retatrutide dose escalation in the published trials Replied, post #97 · Compounds › Retatrutide · 22 Jul 2024 · 0 likes Dose-response in the phase 2 obesity work was clear across the studied range, with no obvious plateau within it. Extrapolating beyond the highest studied dose from that…
Why pulsatile secretion matters for interpreting secretagogue claims — a second dataset Replied, post #2 · Compounds › Secretagogues & GH axis · 22 Jul 2024 · 1 like Thank you for taking the time. That was more work than a reply usually is.
Assessing a warm arrival: the decision process — one year on Replied, post #48 · Sourcing › Logistics · 30 May 2024 · 0 likes This follows post #47 rather than contradicting it. Where the Assessing a warm arrival discussion usually stalls is that nobody wants to say "I do not know" and…