Lundqvist

TL2 Member · Timișoara, RO

Practical questions, practical answers. Not interested in speculation without a source.

Joined 9 August 2025 · last posted 2d

82 posts, newest first. Showing up to 150.

Seven-day rolling means and why weekly readings mislead Replied, post #115 · Outcomes › Progress reports · 26 Jul 2026 · 0 likes My understanding of seven-day rolling is a few years old and may have been superseded. If it has been, I would genuinely like to know rather than keep repeating it.
Conditions that change the calculus rather than forbidding it Replied, post #31 · Safety › Contraindications · 19 Jul 2026 · 0 likes Pregnancy appears in the labelling for this class and the position is stated explicitly rather than left to inference.
Athletes in weight-category sports: a different risk calculus Replied, post #29 · Clinical › Special populations · 17 Jul 2026 · 0 likes On post #27 — agreed on the reasoning, with one qualification. Extrapolating a point estimate to somebody well outside the enrolled range should be described as an…
Revisiting: Protein density versus volume when you cannot eat much Replied, post #71 · Nutrition & Training › Protein & intake · 16 Jul 2026 · 0 likes What tends to work is front-loading the day, prioritising density over volume, and treating it as a solvable problem rather than an inconvenience. That is the version I…
Peak-to-trough ratio at steady state for a weekly agent — the long version Replied, post #51 · Pharmacology › Pharmacokinetics · 15 Jul 2026 · 0 likes Loading doses are not used in this class and the pharmacokinetic reason is tolerability rather than efficacy. A loading dose would reach steady state faster and would…
Sleep apnoea improving and the equipment implications Replied, post #13 · Wellbeing › Sleep · 9 Jul 2026 · 6 likes Adding the measurement that post #10 says would settle it. Fatigue during the day and poor sleep at night are different problems with different causes and get merged in…
Follow-up: Prior authorisation: what the criteria usually require Replied, post #51 · Access › Insurance & coverage · 3 Jul 2026 · 3 likes Formulary changes happen on a published schedule, so a denial now may be answering criteria that change shortly.
[2026 update] Regional warehouse stock versus direct despatch Replied, post #115 · Sourcing › Logistics · 27 Jun 2026 · 0 likes Two people in this thread mean different things by Regional warehouse stock versus direct and are disagreeing about the definition while believing they are disagreeing…
Revisiting: Journal club: SURMOUNT-OSA and a hard endpoint in a soft field Replied, post #57 · Evidence › Journal club · 24 Jun 2026 · 0 likes Taking post #56 at face value and following it one step further. A note on scope: what I am saying about SURMOUNT-OSA applies to the case in the first post and I would…
Second pass at: Programming during a large energy deficit Replied, post #22 · Nutrition & Training › Resistance training · 11 Jun 2026 · 0 likes I had written a reply contradicting post #20 and deleted it. Here is what survived. The reason Programming during a large energy is hard to answer is that the obvious…
Coming back to: Lateral-flow and colorimetric approaches: the specificity problem Replied, post #44 · Analytics › Home & field testing · 10 Jun 2026 · 1 like Post #40 and I disagree about the size of the effect, not about the direction. Where I would push back on the Lateral-flow and colorimetric approaches consensus is the…
Injection timing and sleep disruption Started this topic · Wellbeing › Sleep · 21 May 2026 · 3 likes Posting this under the heading it deserves: Injection timing and sleep disruption Everything below is what sits behind that. Injection timing and sleep disruption:…
Revisiting: The arithmetic of an intermediate dose between two label steps Replied, post #33 · Practice › Dosing & titration · 19 May 2026 · 27 likes Steady state means the plasma concentration is stable from dose to dose. That happens around 4 to 5 half-lives. Before that, the concentration is rising with each dose.…
A plateau that disappeared when I changed how I measured — the long version Replied, post #35 · Outcomes › Progress reports · 7 May 2026 · 7 likes Reporting rather than recommending, on plateau. What happened is above. Whether it should have is a different question and not one I am qualified to answer.
Reading a home test result without over-claiming Replied, post #33 · Analytics › Home & field testing · 6 May 2026 · 0 likes Narrowing post #30, because the general version has more than one answer. Reconstitution behaviour is a legitimate home observation. A cake that will not dissolve, a…
Type 2 diabetes and the largest part of the evidence base Replied, post #70 · Clinical › Comorbidities · 16 Apr 2026 · 2 likes A condition that affects nutrition or absorption changes the calculus around a treatment that reduces intake, and that interaction is mostly unstudied. Somebody will…
Gastro-oesophageal reflux: improving or worsening? Replied, post #35 · Clinical › Comorbidities · 12 Apr 2026 · 4 likes Post #34 answers the question as asked. The question underneath it is different. If you are new and reading this thread for the answer to gastro-oesophageal reflux: the…
Spike-and-recover accuracy for a peptide assay Replied, post #120 · Analytics › Method validation · 11 Apr 2026 · 15 likes Post #118 put the caveat in the right place and I want to underline it. Distinguishing three things in the spike-and-recover accuracy discussion that keep getting used…
Journal club: is percentage weight change the right endpoint? Replied, post #47 · Evidence › Journal club · 7 Apr 2026 · 0 likes STEP 1 (N Engl J Med 2021): The pivotal obesity trial for semaglutide and the reference point for most subsequent comparison. Mean weight reduction was substantially…
Spreadsheets: an appreciation — what changed since Replied, post #12 · Lounge › Off topic · 4 Apr 2026 · 0 likes That is true everywhere. The reference material that gets used is the material that answers a question you have at the moment you have it, and glamour has nothing to do…
A calculator that gives a right answer to the wrong question Replied, post #9 · Data & Tools › Calculators · 10 Mar 2026 · 10 likes Narrowing post #8, because the general version has more than one answer. Titration planning: a calculator that shows you the escalation schedule for different starting…
Measurement error in a self-reported exposure Replied, post #93 · Evidence › Study critique · 26 Feb 2026 · 0 likes Small correction to my own earlier position on measurement error. I had the units the wrong way round, which changes the conclusion by an order of magnitude and…
Absence of evidence and evidence of absence Replied, post #18 · Research Methods › Statistics · 19 Feb 2026 · 3 likes Nothing to add, except that this is the answer I would give if asked.
Mass error in ppm: the arithmetic and the caveat Replied, post #98 · Analytics › Mass spectrometry · 15 Feb 2026 · 0 likes Answering the question post #96 raises rather than the one it answers. Two sentences on mass error in ppm and then I will stop, because the rest is speculation and the…
Trifluoroacetate content and its consequences Replied, post #70 · Analytics › Impurities & related substances · 2 Feb 2026 · 0 likes What I can speak to on trifluoroacetate content is narrow, so I will keep it narrow rather than generalising from it. Beyond that boundary I do not know.
[2026 update] Confounding by indication, explained with a concrete example Replied, post #17 · Evidence › Study critique · 31 Jan 2026 · 0 likes Attrition is the failure mode most likely to invalidate a result and the least likely to be discussed. Differential attrition between arms is the specific thing to look…
Coming back to: Semaglutide in people without diabetes: what the evidence base looks like Replied, post #21 · Compounds › Semaglutide · 4 Jan 2026 · 20 likes The arithmetic in post #20 is right; the assumption feeding it is the part to check. On alcohol: the labelling does not contraindicate it, but it raises gastric…
Coming back to: Payment mechanics and the recovery options that do not exist Replied, post #10 · Sourcing › Payments · 3 Jan 2026 · 33 likes Where I part company with post #8, and it is a narrow parting. Recurring billing: if a supplier sets up recurring billing by default, understanding the terms for…
Gauge and length selection for subcutaneous injection Replied, post #50 · Devices › Syringes & needles · 14 Nov 2025 · 0 likes Sharps containers are a legal requirement for disposal in several jurisdictions and a sensible precaution everywhere. A rigid sealed container is the minimum. That is…
Follow-up: Constipation management, with a dietitian's contribution Replied, post #24 · Practice › Side effects · 13 Nov 2025 · 9 likes The most useful thing anyone has posted about Constipation management in this category was a table of what had been measured and by whom. That is what I would want again.
Where to report an adverse event officially, by region — a second dataset Replied, post #48 · Safety › Adverse events · 23 Oct 2025 · 32 likes On post #45 — agreed on the reasoning, with one qualification. Medullary thyroid carcinoma is the reason these compounds are contraindicated in people with personal or…
Sleep tracking data and its considerable limitations Replied, post #54 · Wellbeing › Sleep · 22 Oct 2025 · 28 likes Post #50 and I disagree about the size of the effect, not about the direction. Two sentences on sleep and then I will stop, because the rest is speculation and the…
Availability by country, dated, with primary sources Replied, post #24 · Access › International · 17 Oct 2025 · 1 like Answering the availability question as asked, then the question I think is meant. As asked: yes, with the qualification below. As meant: it depends on how the first…
Cross-border purchase rules within the EU Replied, post #21 · Regional › European Union · 8 Oct 2025 · 9 likes Cross-border purchase rules: buying a prescription in one EU country and bringing it home is complex. The substance is legal but crossing borders with it requires…
When a tidy document is a signal and when it is decoration Replied, post #11 · Analytics › COA interpretation · 4 Oct 2025 · 12 likes When a document puts the specification in the result column, it has told you the release criterion, not the measurement. Those are different claims and the second is…
Request: a diff view for wiki revisions — the long version Replied, post #50 · Meta › Feature requests · 2 Oct 2025 · 0 likes Post #46 describes the usual case. This is about the unusual one. Adding what did not work for me on diff view for wiki revisions, since the failures never get written…
Reverse causation in a cohort study of weight and outcome — a second dataset Replied, post #75 · Evidence › Study critique · 15 Sep 2025 · 0 likes Adding what did not work for me on Reverse causation, since the failures never get written up and they are half the useful information.
Regional warehouse stock versus direct despatch Replied, post #12 · Sourcing › Logistics · 7 Sep 2025 · 3 likes I have three months of notes on regional warehouse stock versus direct and the honest summary is that the trend is real and the week-to-week numbers are noise. I nearly…
Angle of injection and whether 90 degrees is always right Replied, post #18 · Practice › Administration · 4 Sep 2025 · 8 likes Thank you for taking the time. That was more work than a reply usually is.
Hepatic impairment and the absence of data Replied, post #23 · Clinical › Special populations · 30 Aug 2025 · 1 like Reporting rather than recommending, on hepatic impairment. What happened is above. Whether it should have is a different question and not one I am qualified to answer.
The most useful thing you learned here that was not the answer you came for — a second… Replied, post #11 · Lounge › Off topic · 29 Aug 2025 · 23 likes Newer drugs and mechanisms: when a new drug launches or a new mechanism is discovered, the Lounge is a place to discuss the news and speculate before hard data exists.
Revisiting: Reading a denial letter as a specification for your appeal Replied, post #96 · Access › Insurance & coverage · 27 Aug 2025 · 5 likes Taking post #94 at face value and following it one step further. Formulary status: the list of covered medications and the tier (how much you pay) they are on. Checking…
Are there stupid questions here? A staff answer, at length Replied, post #89 · Start Here › Welcome · 19 Aug 2025 · 0 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…
Pinch or no pinch, and how needle length changes the answer Replied, post #17 · Practice › Administration · 12 Aug 2025 · 1 like Right, and stated more narrowly than I would have dared to state it.
Criticising the method without criticising the authors — one year on Replied, post #16 · Evidence › Study critique · 9 Aug 2025 · 0 likes Narrowing post #14, because the general version has more than one answer. Defending a paper against criticism: if the authors respond, they might clarify something the…
[2026 update] Cardiovascular risk: reading the outcome trials as a set Replied, post #86 · Clinical › Comorbidities · 5 Aug 2025 · 0 likes Coming back to post #82, because the follow-up matters more than the original answer. Where a condition is well controlled and where it is not are different questions…
A ten-fold dose error caught before injection — one year on Replied, post #102 · Devices › Syringes & needles · 4 Aug 2025 · 0 likes Check what the graduations actually say rather than what you expect. A syringe marked in units and one marked in millilitres look similar at a glance and are not the…
Realistic expectations for strength while losing weight quickly Replied, post #9 · Nutrition & Training › Resistance training · 22 Jul 2025 · 0 likes Taking post #7 at face value and following it one step further. An update on my earlier realistic expectations for strength post: the pattern held for another six weeks…
About the Administration category Replied, post #4 · Practice › Administration · 12 Jul 2025 · 28 likes Suggestion for the wiki post above: it would be worth linking the two or three most-referenced topics in this category directly, since new members reliably ask for…
[2026 update] What we do not know about retatrutide, listed explicitly Replied, post #7 · Compounds › Retatrutide · 10 Jul 2025 · 16 likes This follows post #5 rather than contradicting it. What we do not know about retatrutide, listed explicitly: long-term safety, real-world response rates, the dose…
A comparison of home results against a laboratory result on the same vial Replied, post #11 · Analytics › Home & field testing · 5 Jul 2025 · 0 likes Where I part company with post #9, and it is a narrow parting. Precision of home tests: most consumer-accessible devices are not precise to the level people want ("is…
Area percent versus weight percent: the confusion that causes most arguments — what… Replied, post #26 · Analytics › HPLC & UHPLC · 25 Jun 2025 · 3 likes Having read the whole Area percent versus weight percent thread before replying: the question in the first post has not actually been answered yet, and three of us have…
A checklist for reading a certificate in under two minutes — does this still hold? Replied, post #15 · Analytics › COA interpretation · 21 Jun 2025 · 0 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…
Coming back to: Semaglutide half-life: where the 165 to 184 hour figure comes from Replied, post #18 · Compounds › Semaglutide · 6 Jun 2025 · 11 likes The most useful reply I ever got about Semaglutide half-life was a request to state my units. It sounds like pedantry and it has saved me twice.
Coming back to: Getting a referral rather than a refusal Replied, post #16 · Clinical › Prescriber conversations · 30 May 2025 · 0 likes This follows post #13 rather than contradicting it. On Getting a referral, I would rather understate and be corrected upward than overstate and be quoted. That is a…
Coming back to: Why quantitation is the hard part, not detection Replied, post #10 · Analytics › Home & field testing · 27 Apr 2025 · 25 likes What I can speak to on quantitation is narrow, so I will keep it narrow rather than generalising from it. Beyond that boundary I do not know.
What SELECT changed about how semaglutide is discussed, and what it did not Replied, post #89 · Compounds › Semaglutide · 24 Apr 2025 · 6 likes On formulation: the licensed product is buffered and includes a preservative in the multi-dose presentation. A reconstituted research preparation matches neither, and…
A ten-fold dose error caught before injection Replied, post #19 · Devices › Syringes & needles · 10 Apr 2025 · 10 likes Marking my place. If it changes for me I will come back and say so.
Review: a draft on reconstitution arithmetic, with objections Replied, post #94 · Documentation › Doc review · 7 Apr 2025 · 0 likes A review date is a commitment rather than a formality, and a shorter cycle for a fast-moving subject is the whole point of setting it deliberately. That distinction has…
A promotion I argued against, and why I lost Replied, post #155 · Documentation › Doc review · 31 Mar 2025 · 0 likes Post #152 is right about the mechanism and I think understates the practical bit. The most useful review comment names a sentence and says what is wrong with it.…
Units, standards, and other things that quietly hold the world together Replied, post #3 · Lounge › Off topic · 21 Mar 2025 · 1 like Something I have wondered without ever asking: is there a good reason the vocabulary in this field is so inconsistent between suppliers? Half the disagreements here…
Asking about a compound your prescriber has not heard of Replied, post #2 · Clinical › Prescriber conversations · 18 Mar 2025 · 0 likes A question phrased as "what would you want to see before considering X" is answerable and is not a request for X. A partial answer, offered because a partial answer…
Biased agonism: a real phenomenon, an over-used explanation Replied, post #96 · Pharmacology › Receptor biology · 14 Mar 2025 · 16 likes Adding thanks rather than a view. I do not have a view worth the space.
Revisiting: Bug report: the reconstitution calculator and a rounding edge case Replied, post #110 · Data & Tools › Calculators · 1 Mar 2025 · 0 likes A saved calculation is worth more than a remembered one. Write down the inputs alongside the result, because the result alone is unverifiable a month later. Take the…
What we do not know about retatrutide, listed explicitly Replied, post #108 · Compounds › Retatrutide · 23 Feb 2025 · 13 likes Heart rate increased in a dose-dependent way in the phase 2 work. That is not a footnote — it is one of the specific things phase 3 exists to characterise, and it is…
Second pass at: Pharmacy supply in the UK and the questions you will be asked Replied, post #15 · Regional › UK & Ireland · 8 Feb 2025 · 16 likes That is a cleaner way of putting what I was circling around.
Protein density versus volume when you cannot eat much Replied, post #68 · Nutrition & Training › Protein & intake · 4 Feb 2025 · 0 likes Protein supplements: whey, casein, and plant-based protein powders can help hit targets when whole-food intake is limited by appetite. Protein quality (all essential…
Journal club: SURMOUNT-1, read without the press release Replied, post #54 · Evidence › Journal club · 3 Feb 2025 · 23 likes Agreed on SURMOUNT-1, with one qualification that I think matters. The reasoning holds for the case as described. Change the starting assumption and it does not, and…
Canadian access and provincial variation Replied, post #10 · Regional › North America · 22 Jan 2025 · 9 likes Compounded preparations and authorised products are different regulatory categories with different oversight, and conflating them produces most of the confusion here.
Oral semaglutide bioavailability and its variability between people — a second dataset Replied, post #23 · Compounds › Oral incretins · 25 Dec 2024 · 0 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…
[2026 update] How to read a forest plot, properly, from scratch Replied, post #52 · Evidence › Trials · 22 Dec 2024 · 27 likes Risk of bias: structured appraisal of internal validity. Key things to assess: randomisation method (was it truly random or could someone predict the next assignment),…
Time to steady state after a dose increase Replied, post #4 · Pharmacology › Pharmacokinetics · 2 Nov 2024 · 4 likes Metabolism for peptide drugs is proteolytic rather than hepatic in the usual sense, which is why the cytochrome interaction questions that dominate small-molecule…
US compounding rules and how they changed Replied, post #41 · Regional › North America · 26 Oct 2024 · 0 likes Appeals succeed more often than people expect when they answer the stated criterion point by point and include nothing else. A weak preference rather than a position.
Second pass at: Hoarding and why it makes a shortage worse Replied, post #63 · Access › Shortages · 11 Oct 2024 · 0 likes Shortage predictions: regulators and suppliers issue shortage alerts before they become acute. Checking the regulatory website for shortages gives you advance notice. I…
Research-use-only labelling: what it means and what it does not — the long version Replied, post #2 · Sourcing › Regulatory · 20 Sep 2024 · 3 likes Answering the question the opening post raises rather than the one it answers. An update on my earlier Research-use-only labelling post: the pattern held for another…
Second pass at: A field-by-field walk through a certificate of analysis Replied, post #45 · Analytics › COA interpretation · 4 Sep 2024 · 0 likes Peptide content and chromatographic purity are separate determinations and a certificate that reports only one has answered only one question. Content is the one that…
Why a preprint's supplementary material is often the best part Replied, post #6 · Evidence › Preprints · 29 Aug 2024 · 0 likes Version numbers on a preprint server matter. Citing version one of something now on version four is citing a document that has been superseded by its own authors.…
Coming back to: Preparing for an appointment: one page, three questions Replied, post #40 · Clinical › Prescriber conversations · 18 Aug 2024 · 1 like Post #39 answers the question as asked. The question underneath it is different. Preparing for an appointment: bring recent bloodwork, a list of current medications…
Coming back to: Pricing far outside the range, in either direction Replied, post #20 · Sourcing › Red flags · 31 Jul 2024 · 12 likes Second this, and I would have said it less carefully.
Guidelines revision: what changed and why Replied, post #135 · Meta › Announcements · 29 Jul 2024 · 25 likes Helpful, and easy to find again, which is half of what a good reply is.
Journal club: FLOW and the renal composite, component by component Replied, post #43 · Evidence › Journal club · 13 Jul 2024 · 11 likes Building on post #41 rather than restating it. Sessions on negative or null results are consistently the most instructive and the hardest to get anyone to attend.
Two sessions a week versus four: what the evidence supports — a second dataset Replied, post #7 · Nutrition & Training › Resistance training · 8 Jun 2024 · 0 likes The reports here that state the programme, the load and the timeframe are useful. The ones that state an outcome are not. The right answer here may simply be that it…