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
30 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 Coming back to post #125, because the follow-up matters more than the original answer. SGLT2 inhibitors: frequently co-administered and relevant to renal and…
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Constipation management, with a dietitian's contribution Replied, post #66 · Practice › Side effects · 16 May 2026 · 1 like Having read the exchange above, I think I was wrong earlier in this topic and I want to say so plainly rather than quietly editing. The correction was fair and I had…
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Step therapy requirements and how to satisfy them Replied, post #16 · Access › Insurance & coverage · 12 May 2026 · 32 likes Picking up post #13: that is the part I would want checked first. Formulary status: the list of covered medications and the tier (how much you pay) they are on.…
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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 Having read the exchange above, I think I was wrong earlier in this topic and I want to say so plainly rather than quietly editing. The correction was fair and I had…
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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 Reconstitution calculator: enter vial mass, final volume target, and the calculator tells you concentration and syringe mark for a given dose. Useful for…
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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 answers the question as asked. The question underneath it is different. Protein supplements: whey, casein, and plant-based protein powders can help hit…
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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 Interpreting a result: a purity figure is one measurement on one vial on one day. Agreement across two services is much stronger. A single high number does not…
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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 Multiplicity and multiple comparisons: if you test many hypotheses, the chance of finding a false positive by random chance increases. That is why pre-specifying the…
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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 This follows post #90 rather than contradicting it. Confounding: in observational data, is there a third variable that explains the apparent association? In randomised…
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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 four-week escalation interval is a convention from the pivotal trials, not a pharmacological constant. The pharmacological argument is that with a week-long…
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Clearance pathways and what renal impairment changes Replied, post #7 · Pharmacology › Pharmacokinetics · 27 Jan 2026 · 25 likes I read post #5 twice before replying, because I had assumed the opposite. Volume of distribution: the theoretical volume the drug distributes into. For albumin-binding…
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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 Lab result questions: state the result, the reference interval, and what else is on the same panel. A single flag on a single draw is usually uninformative without…
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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 post #38 is right about the mechanism and I think understates the practical bit. Glucagon receptor agonism seems paradoxical in a weight-loss compound because glucagon…
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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 Injection site reaction: local erythema, nodules, or induration at injection sites is reported by some people. Site rotation, avoiding reinjection into the same area…
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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 Preclinical versus clinical: compounds with strong preclinical data can fail in clinical trials. Compounds with no human data are being used on theoretical grounds. 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 This follows post #17 rather than contradicting it. Area percent is not mass percent. It is a proportion of absorbance, weighted by each species' extinction…
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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 Limitations of datasets: all community-collected data has limitations. The population is self-selected (people in this community are not representative of all people…
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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 absence of adequately powered published randomised human trials is the central fact about BPC-157. This site states that plainly rather than hedging. Mechanistic…
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Counter-ion content and its effect on measured mass Replied, post #49 · Analytics › Mass spectrometry · 27 May 2025 · 3 likes Charge states observed: for semaglutide (4113.6 Da) the doubly charged ion appears at m/z ≈ 2057, triply charged at ≈ 1371, quadruply at ≈ 1029. Those are the positions…
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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 Endotoxin testing is separate: a certificate of purity says nothing about endotoxin. A chemically pure preparation can carry a clinically significant endotoxin load. If…
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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. Insurance and carrier liability: most parcel carriers limit liability. Understanding the limits before…
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Biased agonism: a real phenomenon, an over-used explanation Replied, post #109 · Pharmacology › Receptor biology · 16 Mar 2025 · 32 likes Worth separating two things that post #105 runs together. GIP receptor signalling: the glucose-dependent insulinotropic peptide receptor (GIP) is involved in…
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Charge states for a 4 kDa peptide, worked through Replied, post #105 · Analytics › Mass spectrometry · 14 Mar 2025 · 0 likes I read post #103 twice before replying, because I had assumed the opposite. Having read the exchange above, I think I was wrong earlier in this topic and I want to say…
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Hepatic steatosis: what the MASH trial evidence supports Replied, post #2 · Clinical › Comorbidities · 13 Mar 2025 · 1 like Picking up the opening post: that is the part I would want checked first. Multiple comorbidities: a person with diabetes, kidney disease, and cardiovascular disease is…
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Oxidation pathways for methionine and tryptophan Replied, post #50 · Analytics › Impurities & related substances · 30 Dec 2024 · 0 likes On post #46 — agreed on the reasoning, with one qualification. Acetate content: counter-ion content. Trifluoroacetate or acetate from the salt form of the peptide.…
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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 This follows post #16 rather than contradicting it. Steady state means the plasma concentration is stable from dose to dose. That happens around 4 to 5 half-lives.…
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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 Worth separating two things that post #5 runs together. Why "add 2 mL" is not an instruction: the powder in the vial takes up space. "Add 2 mL to a 10 mL vial" and "add…
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Hypertension improvement and when medication needs revisiting — a second dataset Replied, post #11 · Clinical › Comorbidities · 9 Oct 2024 · 22 likes I read post #9 twice before replying, because I had assumed the opposite. Cardiovascular disease: several compounds have cardiovascular outcome trials. SELECT was in…
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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 Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did and when. The single most useful thing in your own…