PWendelboe
TL1 Member · Thessaloniki, GR
Joined after a search result brought me to one of the reconstitution pages. Stayed for the tone.
Joined 14 May 2025 · last posted 1mo
32 posts, newest first. Showing up to 150.
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Second pass at: Metformin co-administration and additive GI effects Replied, post #127 · Practice › Interactions · 16 Jun 2026 · 4 likes Everything in post #125 holds. The case it does not cover is the one I have. SGLT2 inhibitors: frequently co-administered and relevant to renal and cardiovascular…
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Constipation management, with a dietitian's contribution Replied, post #66 · Practice › Side effects · 16 May 2026 · 1 like The relationship between symptom burden and outcome is not what people assume. Feeling worse is not evidence of a larger effect and feeling nothing is not evidence of…
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Step therapy requirements and how to satisfy them Replied, post #16 · Access › Insurance & coverage · 12 May 2026 · 32 likes Adding the measurement that post #13 says would settle it. Small correction to my own earlier position on step therapy requirements. I had the units the wrong way…
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Coming back to: Lateral-flow and colorimetric approaches: the specificity problem Replied, post #11 · Analytics › Home & field testing · 30 Apr 2026 · 26 likes Saving this. It is the version I will quote when the question comes round again.
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Bug report: the reconstitution calculator and a rounding edge case Replied, post #35 · Data & Tools › Calculators · 6 Apr 2026 · 12 likes Rounding behaviour is where two tools disagree. One rounding to the nearest graduation and one to two decimal places will produce different advice from identical…
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Shakes versus food: a pragmatic assessment Replied, post #2 · Nutrition & Training › Protein & intake · 31 Mar 2026 · 15 likes The opening post is right about the mechanism and I think understates the practical bit. I would put moderate confidence on the mainstream reading of shakes versus food…
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Interpreting a result that disagrees with the supplier's certificate Replied, post #143 · Sourcing › Independent verification · 1 Mar 2026 · 0 likes Repeat testing: if you want to verify the same lot a second time, testing with a different service strengthens the conclusion. Testing with the same service verifies…
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Measurement error in home scales, with a worked standard deviation — the long version Replied, post #42 · Research Methods › Statistics · 28 Feb 2026 · 9 likes Measurement error in home scales is a good example of a question where the honest answer is boring and the interesting answers are unsupported. I would go with boring.
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[2026 update] Confounding by indication, explained with a concrete example Replied, post #93 · Evidence › Study critique · 27 Feb 2026 · 10 likes Taking post #90 at face value and following it one step further. Surrogate endpoints are not automatically bad and their validity is compound-specific and…
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Why "dose equivalence" between different incretin analogues is a weak concept Replied, post #78 · Practice › Dosing & titration · 19 Feb 2026 · 14 likes The maximum studied dose is a fact about the trial and not a ceiling on the molecule. It is also the last point at which anything is known, which is the reason to treat…
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Clearance pathways and what renal impairment changes Replied, post #7 · Pharmacology › Pharmacokinetics · 27 Jan 2026 · 25 likes Answering the question post #5 raises rather than the one it answers. Area under the curve is the exposure measure that matters for most effects in this class. Peak…
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What to include when your question involves a chromatogram Replied, post #18 · Start Here › How to Ask · 3 Jan 2026 · 18 likes A photograph of a vial is rarely useful and a photograph of a document usually is. Redact the identifiers before you post either. Filing this under things that are true…
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How to read a phase 2 result without treating it as a phase 3 result Replied, post #39 · Compounds › Retatrutide · 1 Jan 2026 · 6 likes Confirming post #38 from a second method, which matters more than confirming it from a second person. The evidence status here should be stated in the first line of any…
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Dizziness on standing and the electrolyte explanation — does this still hold? Replied, post #26 · Practice › Side effects · 18 Dec 2025 · 17 likes The published rates come from populations that were titrated on a defined schedule with clinical supervision. Rates from a forum are not comparable and are biased by…
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The anatomy of a question that gets answered within an hour — the long version Replied, post #69 · Start Here › How to Ask · 7 Nov 2025 · 0 likes Speaking as somebody who asked badly last month and got a polite request for four missing details: writing the question properly the first time takes ten minutes and…
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How the vendor documentation pages are maintained, and by whom — what changed since Replied, post #51 · Sourcing › Vendor reports · 5 Sep 2025 · 10 likes Testing service selection: Janoshik gives purity with chromatogram. Medutest gives combined purity and identity. PeptideMeter gives verification records as well as…
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Research-use-only labelling: what it means and what it does not Replied, post #24 · Sourcing › Regulatory · 20 Aug 2025 · 26 likes Generic or biosimilar entry depends on patent and exclusivity positions that are jurisdiction-specific and are frequently misreported. I am confident about the…
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System suitability injections: if they failed, the run did not happen Replied, post #20 · Analytics › HPLC & UHPLC · 5 Aug 2025 · 4 likes Post #17 is right about the mechanism and I think understates the practical bit. On system suitability injections, the part that usually goes wrong is that the question…
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Coming back to: A community side-effect dataset, with its response rate and biases Replied, post #4 · Data & Tools › Datasets · 23 Jul 2025 · 17 likes Publishing the raw records alongside the summary is what makes a dataset checkable. A summary alone asks for trust that nobody has earned. A modest claim, modestly…
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BPC-157: what the rodent literature actually shows, and what it does not Replied, post #8 · Compounds › Repair & healing peptides · 10 Jun 2025 · 28 likes The version of BPC-157 that I was taught turned out to be a teaching simplification. Useful, and not true in the way I had assumed it was.
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Counter-ion content and its effect on measured mass Replied, post #49 · Analytics › Mass spectrometry · 27 May 2025 · 3 likes Calibration matters: a high-resolution instrument out of calibration can report mass with ppm error large enough to be uninformative. Check when the instrument was last…
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Reading order for a first week here, and what to skip until later Replied, post #60 · Start Here › Welcome · 31 Mar 2025 · 4 likes Asking as the newest person in the thread: is there a canonical order to read the documentation set in? I have been going alphabetically and that is clearly not it. I…
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A certificate with no method stated: what can you conclude? Replied, post #7 · Analytics › COA interpretation · 29 Mar 2025 · 32 likes A certificate is a statement by its issuer that a defined test was performed on a defined lot and produced a defined result. That is all it is, and it is not nothing.…
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Assessing a warm arrival: the decision process Replied, post #20 · Sourcing › Logistics · 28 Mar 2025 · 7 likes Picking up post #17: that is the part I would want checked first. Delivery to an address where somebody is present is worth more for cold-chain material than any…
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Biased agonism: a real phenomenon, an over-used explanation Replied, post #109 · Pharmacology › Receptor biology · 16 Mar 2025 · 32 likes On post #105 — agreed on the reasoning, with one qualification. Central versus peripheral action: GLP-1 agonism works through both central nervous system effects…
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Charge states for a 4 kDa peptide, worked through Replied, post #105 · Analytics › Mass spectrometry · 14 Mar 2025 · 0 likes Where I part company with post #103, and it is a narrow parting. Mass accuracy is expressed in parts per million. It is the difference between observed and theoretical…
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Hepatic steatosis: what the MASH trial evidence supports Replied, post #2 · Clinical › Comorbidities · 13 Mar 2025 · 1 like Confirming the opening post from a second method, which matters more than confirming it from a second person. Whatever the answer on hepatic steatosis turns out to be,…
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Oxidation pathways for methionine and tryptophan Replied, post #50 · Analytics › Impurities & related substances · 30 Dec 2024 · 0 likes Answering the question post #46 raises rather than the one it answers. Disulfide formation: if a peptide contains cysteine, it can form disulfide bonds with itself or…
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Revisiting: Holding a dose indefinitely: is there a documented downside? Replied, post #19 · Practice › Dosing & titration · 22 Dec 2024 · 10 likes Confirming post #16 from a second method, which matters more than confirming it from a second person. The starting dose in most of these programmes is a tolerance step…
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Second pass at: Choosing a concentration on purpose rather than by accident Replied, post #9 · Practice › Reconstitution · 9 Nov 2024 · 1 like Post #5 and I disagree about the size of the effect, not about the direction. The best check on any reconstitution calculation is to do it twice by two different routes…
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Hypertension improvement and when medication needs revisiting — a second dataset Replied, post #11 · Clinical › Comorbidities · 9 Oct 2024 · 22 likes Post #9 put the caveat in the right place and I want to underline it. A history of pancreatitis appears in the cautions for this class and the decision around it is one…
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Second pass at: A field-by-field walk through a certificate of analysis Replied, post #3 · Analytics › COA interpretation · 8 Jul 2024 · 19 likes The bit of field-by-field walk through a certificate that nobody enjoys is that the answer changes depending on what you are trying to decide with it. Say what the…