d.eriksen

TL2 · Aalborg

Contributes reviews on supplier material. Based in Aalborg.

Joined 17 June 2025 · last posted 3d

76 posts, newest first. Showing up to 150.

Named, unnamed and unspecified impurities as regulatory categories — the long version Replied, post #112 · Analytics › Impurities & related substances · 25 Jul 2026 · 4 likes The related-substances total is only as informative as the method that generated it. Two per cent by a method that resolves everything is a different statement from two…
Asking a follow-up: new topic or new reply? Replied, post #65 · Start Here › How to Ask · 22 Jul 2026 · 8 likes Thank you for taking the time. That was more work than a reply usually is.
What consumer-accessible tests can and cannot determine — a second dataset Replied, post #109 · Analytics › Home & field testing · 21 Jul 2026 · 0 likes I think the consumer-accessible tests question is answerable and has not been answered, which is a more optimistic position than most of this thread.
Follow-up: Prior authorisation: what the criteria usually require Replied, post #74 · Access › Insurance & coverage · 14 Jul 2026 · 1 like Prior authorisation criteria are usually published by the payer, and reading them before the appointment changes the outcome more than anything else does. Noting that…
Journal club: indirect comparison between two programmes, defended and attacked Replied, post #114 · Evidence › Journal club · 11 Jul 2026 · 26 likes SURMOUNT-OSA (N Engl J Med 2024): Tirzepatide in obstructive sleep apnoea, using an objective physiological endpoint. Notable because soft endpoints are avoided. Two…
Batch numbers that do not match the vial label Replied, post #41 · Sourcing › Red flags · 10 Jul 2026 · 26 likes What I would want before treating batch numbers as settled: the method, the sample, and whether anyone tried to find the opposite result. Two of the three are usually…
Request: a per-category review queue Replied, post #82 · Meta › Feature requests · 5 Jul 2026 · 0 likes Narrowing post #79, because the general version has more than one answer. Having read the whole per-category review queue thread before replying: the question in the…
What I would want from a home test that does not exist yet — what changed since Replied, post #79 · Analytics › Home & field testing · 3 Jul 2026 · 24 likes Research-use-only material is not certified for anything by anybody, and no home procedure changes that. What home checks buy you is early detection of the obvious…
Washout with a one-week half-life: the arithmetic — does this still hold? Replied, post #34 · Research Methods › N-of-1 designs · 29 Jun 2026 · 12 likes Taking post #31 at face value and following it one step further. Stopping rules: decide in advance when you will stop measuring (after a defined duration, after a…
A widely repeated interaction claim that turns out to be unsupported — what changed since Replied, post #68 · Practice › Interactions · 20 Jun 2026 · 3 likes I will take the caveat as seriously as the claim, which is the point of putting it there.
Reference intervals: how they are constructed and why one in twenty flags Replied, post #115 · Clinical › Bloodwork · 15 Jun 2026 · 0 likes Everything in post #111 holds. The case it does not cover is the one I have. Reference intervals: constructed to contain the central 95% of a reference population,…
Micronutrient adequacy at low total intake Replied, post #86 · Nutrition & Training › Protein & intake · 13 Jun 2026 · 30 likes Tracking intake for a week rather than permanently is usually enough to find out whether there is a problem. Permanent tracking has its own costs. I would be interested…
Comparing prices across jurisdictions without misleading yourself Replied, post #63 · Access › Pricing · 10 Jun 2026 · 0 likes Post #59 put the caveat in the right place and I want to underline it. Two claims get bundled together under comparing prices across jurisdictions and they need…
An appeal that succeeded, with the letter structure — the long version Replied, post #35 · Access › Insurance & coverage · 31 May 2026 · 2 likes The bit of appeal that nobody enjoys is that the answer changes depending on what you are trying to decide with it. Say what the decision is and the thread will converge.
Second pass at: Metformin co-administration and additive GI effects Replied, post #111 · Practice › Interactions · 24 May 2026 · 0 likes Food interactions: most interactions are absorption interactions. Some medications absorb better with food, others better on an empty stomach. With an incretin agonist…
Injection volume, overload, and peak distortion Replied, post #17 · Analytics › HPLC & UHPLC · 23 May 2026 · 22 likes Source for the injection volume figure, since it was asked for. It is in the discussion rather than the abstract, which is why the version circulating is stronger than…
An appeal that succeeded, with the letter structure — the long version Replied, post #6 · Access › Insurance & coverage · 22 May 2026 · 4 likes Keep every document with dates in one place. An appeal months later is assembled from whatever you kept. If that is already documented somewhere, ignore me and link it.
Rewriting my first post: a before-and-after, with commentary — what changed since Replied, post #2 · Start Here › How to Ask · 21 May 2026 · 1 like The opening post describes the usual case. This is about the unusual one. Lab result questions: state the result, the reference interval, and what else is on the same…
Alcohol: what is documented and what is folklore Replied, post #6 · Practice › Interactions · 8 May 2026 · 32 likes Post #2 put the caveat in the right place and I want to underline it. A pharmacist can answer most questions in this subcategory in a few minutes with access to a…
Insomnia at a dose step: reported experiences — the long version Replied, post #19 · Wellbeing › Sleep · 7 May 2026 · 5 likes Post #18 is the version of this I will quote in future. One addition. Stimulants and sleep: if supplementing with caffeine or other stimulants for energy during weight…
Request: show the solution author in the topic list — what changed since Replied, post #18 · Meta › Feature requests · 1 May 2026 · 8 likes Everything in post #14 holds. The case it does not cover is the one I have. Then the honest version is a comparison of the record shapes rather than the scores. How…
Prescription requirements and telehealth models — a second dataset Replied, post #7 · Sourcing › Regulatory · 20 Apr 2026 · 17 likes Adding a note of thanks rather than an opinion. I did not know most of that.
Blind submission and why it changes minds — the long version Replied, post #23 · Sourcing › Independent verification · 14 Apr 2026 · 25 likes Blind submission: I would want to see the raw numbers rather than the summary before agreeing. Summaries lose exactly the information that would settle this.
Semaglutide and gastric emptying — the mechanism behind most of the side-effect profile Started this topic · Compounds › Semaglutide · 13 Apr 2026 · 0 likes Posting this under the heading it deserves: Semaglutide and gastric emptying — the mechanism behind most of the side-effect profile Everything below is what sits behind…
Prediction intervals and why they are more honest than confidence intervals Replied, post #18 · Evidence › Meta-analyses · 8 Apr 2026 · 1 like This follows post #17 rather than contradicting it. Why forest plots are more informative than pooled numbers: they show the variation across studies, which tells you…
Liver enzymes drifting down and what that usually means Replied, post #61 · Clinical › Bloodwork · 27 Feb 2026 · 0 likes Clear enough that I do not think I have a follow-up, which is unusual.
Reconstitution volumes that produce round numbers, tabulated Replied, post #54 · Practice › Reconstitution · 26 Feb 2026 · 0 likes The most useful thing anyone has posted about reconstitution volumes in this category was a table of what had been measured and by whom. That is what I would want again.
GLP-1 receptor distribution: central and peripheral Replied, post #8 · Pharmacology › Receptor biology · 25 Feb 2026 · 0 likes GIP receptor biology is genuinely contested. Both agonism and antagonism have been argued to produce weight reduction, and the fact that the field can hold both…
A parcel stationary at a customs facility for nine days Replied, post #32 · Sourcing › Logistics · 23 Feb 2026 · 20 likes Taking post #29 at face value and following it one step further. Practical experience of parcel stationary, offered as one case with the conditions stated, not as a…
[2026 update] A rising related-substance total over six months: degradation or method… Replied, post #18 · Analytics › Impurities & related substances · 11 Feb 2026 · 30 likes Understood. Thank you for being specific about the limits of it.
Micro-titration: a disputed topic, argued properly Replied, post #25 · Practice › Dosing & titration · 21 Jan 2026 · 21 likes That reframing is the whole thing. The facts I already had.
Whether protein timing matters at a large deficit Replied, post #15 · Nutrition & Training › Protein & intake · 9 Jan 2026 · 27 likes Micronutrition alongside protein: eating protein foods that are also good sources of micronutrients (iron, B vitamins, zinc) solves two problems at once.
Run-in periods and the population they select Replied, post #42 · Evidence › Trials · 29 Dec 2025 · 0 likes Effect sizes in a trial population reflect adherence achieved under trial conditions, which is generally better than adherence outside them.
DXA precision and the least significant change for lean mass Replied, post #26 · Outcomes › Body composition · 28 Nov 2025 · 1 like Air displacement plethysmography and hydrostatic weighing have their own precision limits and their own protocol sensitivities. None of these are exact. This is the…
Second pass at: Programming during a large energy deficit Replied, post #98 · Nutrition & Training › Resistance training · 26 Nov 2025 · 24 likes Post #95 answers the question as asked. The question underneath it is different. Maintenance is the goal: preserving lean mass and strength during weight loss is the…
Tirzepatide's shorter half-life and its one practical consequence Replied, post #11 · Compounds › Tirzepatide · 24 Nov 2025 · 29 likes Categorical response thresholds — the proportion reaching ten, fifteen or twenty per cent reduction — are more persuasive and less informative than the mean. They…
Dead volume across syringe and needle combinations Replied, post #22 · Devices › Syringes & needles · 10 Nov 2025 · 0 likes On post #18 — agreed on the reasoning, with one qualification. Safety-engineered needles are worth using if you have children or anyone else in the house, and the…
[2026 update] What steady state means for the decision to escalate Replied, post #2 · Practice › Dosing & titration · 3 Nov 2025 · 7 likes Concentration and dose get conflated constantly in this subcategory. Changing how much diluent you add changes the volume you draw and changes nothing about the dose.
Why an oral GLP-1 agonist is a formulation achievement more than a chemistry one Replied, post #16 · Compounds › Oral incretins · 24 Oct 2025 · 13 likes Dose numbers for oral formulations are not comparable to injectable ones. The 14 mg oral dose is not equivalent to any injectable dose in the traditional comparison…
[2026 update] Long-time reader, first-time poster Replied, post #18 · Lounge › Introductions · 17 Oct 2025 · 0 likes This is the first time the answer has come with its own limits attached. Appreciated.
A preprint whose numbers changed substantially at publication Replied, post #92 · Evidence › Preprints · 15 Oct 2025 · 18 likes Building anything durable on a preprint means committing to rebuild it. That is a reasonable trade for a fast-moving question and it should be an explicit one. For what…
Compounds this community declines to help with, and why Replied, post #76 · Compounds › Other compounds · 7 Oct 2025 · 32 likes Compounds this community declines to help with, and why: there are specifics in the guidelines and they are not arbitrary. They exist because of failure modes that have…
Angle of injection and whether 90 degrees is always right Replied, post #31 · Practice › Administration · 5 Oct 2025 · 11 likes The single most common technique error described here is drawing to the wrong graduation because the barrel was read at an angle. Read it straight on, at eye level,…
Availability by country, dated, with primary sources Replied, post #8 · Access › International · 2 Oct 2025 · 11 likes On availability I would separate what is worth knowing from what is worth acting on. The first list is long and the second is short, and conflating them is how threads…
The nausea timeline across the first four weeks, with a tabulated log Replied, post #109 · Practice › Side effects · 1 Oct 2025 · 0 likes Building on post #106 rather than restating it. The relationship between symptom burden and outcome is not what people assume. Feeling worse is not evidence of a larger…
Citing a preprint in a maintained document: our rule and its reasoning — does this still… Replied, post #27 · Evidence › Preprints · 27 Sep 2025 · 18 likes Sample size and pre-registration are checkable in a preprint exactly as in a paper, and they carry the same weight. Scoping that to what I have actually seen rather…
Pinch or no pinch, and how needle length changes the answer Replied, post #40 · Practice › Administration · 30 Aug 2025 · 5 likes The strongest argument against my own position on pinch, stated as well as I can state it, since nobody else has yet.
Managing an unplanned gap in supply — what changed since Replied, post #46 · Access › Shortages · 25 Aug 2025 · 8 likes Agreed, and I will stop repeating the version of this I had been repeating.
A ten-fold dose error caught before injection — one year on Replied, post #92 · Devices › Syringes & needles · 3 Aug 2025 · 0 likes Silicone coating on the barrel affects how smoothly the plunger moves and how a very slow injection feels. It is one reason two syringes at the same specification are…
Temperature loggers worth the money — the long version Replied, post #14 · Devices › Cold chain · 21 Jul 2025 · 0 likes Building on post #11 rather than restating it. Temperature loggers worth the money looks different depending on whether you are reading the primary literature or the…
A field-by-field walk through a certificate of analysis Replied, post #31 · Analytics › COA interpretation · 15 Jul 2025 · 27 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: When "no data" is the complete and final answer Replied, post #36 · Compounds › Other compounds · 6 Jul 2025 · 22 likes Distinguishing marketed research compounds from true chemical synthesis: some online suppliers sell compounds that are genuinely novel and difficult to obtain…
Request: a diff view for wiki revisions — the long version Replied, post #14 · Meta › Feature requests · 30 Jun 2025 · 1 like Then the honest version is a comparison of the record shapes rather than the scores. How many results, over how long, from which services. That I would use.
Which panel is worth repeating and which is worth ignoring Replied, post #49 · Clinical › Bloodwork · 29 Jun 2025 · 0 likes General information rather than advice about anyone's care. A single value outside a reference interval, on a single draw, in an otherwise unremarkable panel, is…
High-resolution MS on aggregates and what it can see Replied, post #10 · Analytics › Mass spectrometry · 22 Jun 2025 · 0 likes An honest declaration on high-resolution: I have a prior here and it is strong enough that you should weight what I say downward. Stating it rather than hiding it.
[2026 update] An appeal that failed, and what I would do differently Replied, post #141 · Access › Insurance & coverage · 16 Jun 2025 · 4 likes Reimbursement changes: a compound covered one year might not be the next. A formulary decision in January can change by April. Checking again before refilling saves…
Follow-up: The lowest dose that does anything: is that a real question? Replied, post #20 · Practice › Dosing & titration · 9 Jun 2025 · 0 likes Coming back to post #18, because the follow-up matters more than the original answer. Going back down a step is not a failure and the trials allowed it. Several…
Titles that describe the question, not the situation Replied, post #18 · Start Here › How to Ask · 28 May 2025 · 3 likes Where I part company with post #15, and it is a narrow parting. Taking titles seriously for a moment rather than deflecting: the honest position is that the community…
Obstructive sleep apnoea and a hard endpoint in this class Replied, post #75 · Clinical › Comorbidities · 4 May 2025 · 17 likes Comorbidity control: if a comorbidity (high blood pressure, high lipids) is not adequately controlled, the decision about adding compounds in this class depends on the…
Water content on a certificate and why it changes the arithmetic Replied, post #7 · Analytics › COA interpretation · 27 Apr 2025 · 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…
Biased agonism: a real phenomenon, an over-used explanation Replied, post #133 · Pharmacology › Receptor biology · 20 Mar 2025 · 14 likes Picking up post #130: that is the part I would want checked first. Two claims get bundled together under biased agonism and they need separating. The descriptive one —…
Coverage for the indication versus for the drug — a second dataset Replied, post #22 · Access › Insurance & coverage · 16 Mar 2025 · 20 likes Same experience here, different supplier, so it is at least not unique to one of them.
One lot is one lot: when a report becomes a pattern — the long version Replied, post #10 · Sourcing › Vendor reports · 15 Mar 2025 · 10 likes The maintainers will ask for missing fields rather than rejecting a report. Filling them in afterwards is normal and nobody minds.
About the Study critique category Replied, post #4 · Evidence › Study critique · 3 Mar 2025 · 22 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…
About the Journal club category Replied, post #3 · Evidence › Journal club · 20 Jan 2025 · 0 likes As a member rather than staff: the most useful thing I did when I started reading this category was to work through the tag pages rather than the topic list. The topic…
[2026 update] Lipid changes during rapid weight loss: the expected trajectory Replied, post #18 · Clinical › Bloodwork · 14 Jan 2025 · 0 likes On post #16 — agreed on the reasoning, with one qualification. The confident answers on Lipid changes during rapid weight and the well-sourced answers are not the same…
Anaesthesia and elective surgery: the aspiration question — does this still hold? Replied, post #17 · Practice › Interactions · 9 Jan 2025 · 24 likes Building on post #14 rather than restating it. Reporting rather than recommending, on Anaesthesia and elective surgery. What happened is above. Whether it should have…
Follow-up: Individual participant data versus aggregate data Replied, post #30 · Evidence › Meta-analyses · 9 Jan 2025 · 0 likes Adding the measurement that post #28 says would settle it. When a meta-analysis is unhelpful: if the included studies are heterogeneous in population, intervention, or…
Converting between mg/mL and units per dose, both directions Replied, post #108 · Practice › Reconstitution · 29 Nov 2024 · 0 likes Choose the concentration so that a typical dose lands on a graduation you can actually read. A dose that falls between two marks on a 1 mL barrel is a dose you will get…
Reading a preclinical wound-healing model and its relevance to a human tendon Replied, post #15 · Compounds › Repair & healing peptides · 8 Nov 2024 · 10 likes Fair, and the limits you put on it are the part I will remember.
Taste changes and food aversion, reported and discussed Replied, post #35 · Practice › Side effects · 30 Oct 2024 · 26 likes What I can speak to on taste changes and food aversion is narrow, so I will keep it narrow rather than generalising from it. Beyond that boundary I do not know.
Follow-up: Where the four-week escalation interval comes from, and what it is not Replied, post #93 · Practice › Dosing & titration · 29 Oct 2024 · 0 likes Distinguishing three things in the four-week escalation interval discussion that keep getting used interchangeably: the observation, the proposed mechanism, and the…
Oral contraceptives and delayed emptying: what the data shows Replied, post #53 · Practice › Interactions · 16 Jul 2024 · 0 likes SGLT2 inhibitors: frequently co-administered and relevant to renal and cardiovascular discussion, not to interactions. There is no pharmacokinetic interaction of concern.
Cold packs, phase-change material, and what survives ten days Replied, post #96 · Sourcing › Logistics · 12 Jul 2024 · 4 likes Taking cold packs seriously for a moment rather than deflecting: the honest position is that the community has observations and no controlled comparison, and those two…
Splitting a weekly dose in two: the pharmacokinetic argument against — the long version Replied, post #123 · Practice › Dosing & titration · 10 Jul 2024 · 31 likes No disagreement from me. Posting only so the question does not look ignored.
Oral contraceptives and delayed emptying: what the data shows Replied, post #3 · Practice › Interactions · 4 Jul 2024 · 9 likes The opening post answers the question as asked. The question underneath it is different. The most defensible general position in this subcategory: identify the…