a.finnegan_rd

TL2 Dietitian · Galway, IE

Dietitian. Electrolytes, hydration and the very ordinary reasons people feel awful in week two.

Joined 2 December 2024 · last posted 1d · groups: clinicians

94 posts, newest first. Showing up to 150.

Coming back to: Telehealth prescribing models in the US Replied, post #30 · Regional › North America · 26 Jul 2026 · 9 likes Post #28 put the caveat in the right place and I want to underline it. Two things can be true about Telehealth prescribing models at once: the mechanism is plausible…
What I would want from a home test that does not exist yet — what changed since Replied, post #111 · Analytics › Home & field testing · 26 Jul 2026 · 31 likes Immunoassay limitations: tests that use antibodies have cross-reactivity limitations. An antibody raised to semaglutide will cross-react to some degree with tirzepatide…
Follow-up: How compounding permissions changed when supply normalised Replied, post #70 · Sourcing › Regulatory · 25 Jul 2026 · 5 likes Picking up post #69: that is the part I would want checked first. Compounding permissions is well covered in the tag pages, and the older discussions are better than…
Pooling trials with different estimands Replied, post #124 · Evidence › Meta-analyses · 24 Jul 2026 · 3 likes Taking post #121 at face value and following it one step further. A request rather than an answer: could whoever has the primary source for pooling trials with…
Revisiting: Taste changes and food aversion, reported and discussed Replied, post #24 · Practice › Side effects · 23 Jul 2026 · 0 likes That is the distinction I keep failing to hold on to. Written down now.
Programming during a large energy deficit Replied, post #45 · Nutrition & Training › Resistance training · 20 Jul 2026 · 0 likes Recovery capacity falls with energy availability, so a programme that worked at maintenance may be too much during a large deficit. I would put the burden of proof on…
Why the timeline is on the right and not the left — what changed since Replied, post #78 · Meta › Site feedback · 20 Jul 2026 · 8 likes Two claims get bundled together under timeline and they need separating. The descriptive one — this is what was observed — is usually well supported. The causal one —…
A site rotation scheme that is easy enough to actually follow Replied, post #115 · Practice › Administration · 15 Jul 2026 · 0 likes A request rather than an answer: could whoever has the primary source for site rotation scheme post it? I have seen the claim three times this month and each version…
eGFR fluctuation and the creatinine denominator problem Started this topic · Clinical › Bloodwork · 6 Jul 2026 · 46 likes On the subject in the title: eGFR fluctuation and the creatinine denominator problem Working notes rather than a conclusion. Proposing that egfr fluctuation deserves a…
Does a peptide degrade silently, with no visual change? Replied, post #61 · Practice › Storage & stability · 2 Jul 2026 · 2 likes Something worth flagging about peptide: the strongest-sounding claims in this thread are the ones with no source attached, which is the usual pattern and not a…
What consumer-accessible tests can and cannot determine — a second dataset Replied, post #34 · Analytics › Home & field testing · 28 Jun 2026 · 0 likes A home refractometer is not measuring what people hope it is measuring in these preparations, and the readings are dominated by everything other than the peptide.
Named, unnamed and unspecified impurities as regulatory categories — the long version Replied, post #24 · Analytics › Impurities & related substances · 25 Jun 2026 · 6 likes A supplier that can tell you what its principal impurity is has answered a harder question than one that can tell you its purity, and the answer is more useful.…
Sleep quality changes during weight loss Replied, post #2 · Wellbeing › Sleep · 24 Jun 2026 · 2 likes Sleep apnoea improvement: as weight is lost, sleep apnoea usually improves. The timeframe is weeks to months, not immediate. Improvement often is gradual rather than…
Stepping down deliberately, and how to do it without losing progress — what changed since Replied, post #14 · Practice › Dosing & titration · 24 Jun 2026 · 4 likes Confirming post #13 from a second method, which matters more than confirming it from a second person. A titration plan written down in advance is easier to stick to and…
Follow-up: The most useful thing you learned here that was not the answer you came for Replied, post #9 · Lounge › Off topic · 18 Jun 2026 · 15 likes Industry and supply chain: post about manufacturing, pharmaceutical economics, or market dynamics if you have something substantive to contribute.
Constipation management, with a dietitian's contribution Replied, post #75 · Practice › Side effects · 6 Jun 2026 · 21 likes Everything in post #71 holds. The case it does not cover is the one I have. The published rates come from populations that were titrated on a defined schedule with…
Cold solution and stinging: the simplest fix Replied, post #32 · Practice › Administration · 5 Jun 2026 · 0 likes Two people in this thread mean different things by cold solution and stinging and are disagreeing about the definition while believing they are disagreeing about the…
What to include when your question involves a chromatogram — one year on Replied, post #26 · Start Here › How to Ask · 5 Jun 2026 · 20 likes Number your questions if there is more than one. It sounds fussy. It means the answer can be numbered back, and you find out which one nobody addressed.
Alcohol: what is documented and what is folklore Replied, post #40 · Practice › Interactions · 3 Jun 2026 · 14 likes A supplement is a drug for interaction purposes, and the fact that it is sold without a prescription tells you nothing about whether it interacts. The paperwork is…
Preservatives: function, testing, and limits — one year on Replied, post #16 · Pharmacology › Formulation chemistry · 12 May 2026 · 32 likes Narrowing post #13, because the general version has more than one answer. Preservatives: solutions for multi-dose vials contain preservatives (benzyl alcohol, phenol,…
[2026 update] What a purity-only report leaves out Replied, post #90 · Sourcing › Independent verification · 14 Apr 2026 · 2 likes A record with four results over sixteen months is a thin record rather than a bad one, and the honest description says which. The number is defensible. The precision I…
Rotating between abdomen, thigh and upper arm: absorption differences — one year on Replied, post #43 · Practice › Administration · 6 Apr 2026 · 11 likes The confident answers on Rotating between abdomen and the well-sourced answers are not the same answers, which is the most useful thing I have learned reading this…
Search filters: what is missing Replied, post #43 · Meta › Site feedback · 4 Apr 2026 · 26 likes Worth separating search filters as a question about the compound from search filters as a question about the documentation. They get answered by different people and…
Lean mass preservation: what the evidence supports — does this still hold? Replied, post #52 · Outcomes › Body composition · 3 Apr 2026 · 1 like I have three months of notes on Lean mass preservation and the honest summary is that the trend is real and the week-to-week numbers are noise. I nearly drew the…
Foaming during reconstitution and whether it matters — the long version Replied, post #84 · Practice › Reconstitution · 2 Apr 2026 · 0 likes Narrowing post #81, because the general version has more than one answer. Two sentences on Foaming during reconstitution and then I will stop, because the rest is…
The most useful thing you learned here that was not the answer you came for Replied, post #31 · Lounge › Off topic · 31 Mar 2026 · 1 like Agreed, and the corollary is that a place with no visible corrections is not a place with fewer errors.
Measurement error in home scales, with a worked standard deviation — the long version Replied, post #59 · Research Methods › Statistics · 22 Mar 2026 · 4 likes Where I part company with post #56, and it is a narrow parting. Number needed to treat: how many people need to be treated to prevent one bad outcome or achieve one…
Washout with a one-week half-life: the arithmetic — does this still hold? Started this topic · Research Methods › N-of-1 designs · 20 Mar 2026 · 17 likes Washout with a one-week half-life: the arithmetic — does this still hold? — that is the question, and I have not found it answered plainly anywhere I have looked.…
Coming back to: Washout: how long is long enough, and for what purpose Replied, post #74 · Pharmacology › Pharmacokinetics · 17 Mar 2026 · 25 likes Post #71 is right about the mechanism and I think understates the practical bit. Area under the curve is the exposure measure that matters for most effects in this…
The "under review" status pill and when a moderator applies it Replied, post #23 · Evidence › Preprints · 16 Mar 2026 · 9 likes Picking up post #22: that is the part I would want checked first. Author track record is a weak signal and it is a signal. A group that has published carefully for…
An ABAB design with a data table and honest limitations — a second dataset Replied, post #66 · Research Methods › N-of-1 designs · 15 Mar 2026 · 16 likes Withdrawal and reintroduction is the strongest design available to an individual, and it only works for effects that reverse on a timescale you can observe. Reporting…
Oral versus injectable exposure: comparing apples to a different fruit — a second dataset Replied, post #2 · Compounds › Oral incretins · 12 Mar 2026 · 10 likes Good question, well framed, and I would like to see it answered properly.
Nausea profile of amylin analogues compared with GLP-1 agonists Replied, post #50 · Compounds › Cagrilintide & amylin analogues · 8 Mar 2026 · 12 likes For anyone arriving from searches on "amylin agonist": this subcategory discusses published clinical evidence and what it does and does not establish. It does not…
Injection discomfort: needle gauge, volume, temperature, technique Replied, post #35 · Practice › Administration · 8 Mar 2026 · 31 likes Taking post #34 at face value and following it one step further. I would call the community position on injection discomfort likely rather than established, and I would…
Splitting a weekly dose in two: the pharmacokinetic argument against Replied, post #7 · Practice › Dosing & titration · 4 Mar 2026 · 11 likes Post #3 describes the usual case. This is about the unusual one. Splitting a weekly dose in two: the pharmacokinetic argument against is that you want the benefit of…
Anaesthesia and elective surgery: the aspiration question Replied, post #29 · Practice › Interactions · 22 Feb 2026 · 30 likes The arithmetic in post #26 is right; the assumption feeding it is the part to check. Distinguishing three things in the anaesthesia and elective surgery discussion that…
Research-use-only status: what it means legally and practically Replied, post #5 · Compounds › Other compounds · 16 Feb 2026 · 0 likes On analysis: unusual or modified sequences are exactly where a default reversed-phase method is least likely to be appropriate. A supplier that runs everything on one…
Why "dose equivalence" between different incretin analogues is a weak concept Replied, post #12 · Practice › Dosing & titration · 15 Feb 2026 · 0 likes If symptoms reset at each step, that is the expected pattern rather than a sign that the previous adaptation was imaginary. Every dose increase is a new exposure. Two…
Personal import allowances, compared — a second dataset Replied, post #66 · Access › International · 9 Feb 2026 · 0 likes I would keep Personal import allowances and the decision it usually gets used for separate in this thread. They are related and they are not the same question, and…
Trifluoroacetate content and its consequences Replied, post #117 · Analytics › Impurities & related substances · 9 Feb 2026 · 1 like That last point is the ceiling on what any purity figure can claim. A method that cannot see a species cannot exclude it, and no certificate says which species its…
Trifluoroacetate content and its consequences Replied, post #50 · Analytics › Impurities & related substances · 30 Jan 2026 · 16 likes Confirming post #47 from a second method, which matters more than confirming it from a second person. Truncation products are substantially lower in mass and usually…
Request: export my own posts Replied, post #2 · Meta › Feature requests · 18 Jan 2026 · 14 likes Community support: if other people support your request, they can reply with "+1" or "I would use that too". Widely-requested features are prioritised. Filing this…
"Greater than or equal to 99%" as a specification rather than a result Replied, post #108 · Analytics › COA interpretation · 11 Jan 2026 · 2 likes The distinction between release testing and characterisation is one industrial documents make and retail ones usually do not. It is the difference between "we tested…
Revisiting: A page that has drifted out of date and needs a maintainer Replied, post #27 · Documentation › Wiki requests · 7 Jan 2026 · 15 likes Post #25 describes the usual case. This is about the unusual one. Documents that are mostly a worked example age better than documents that are mostly a summary,…
Storing lyophilised material long term: what governs the shelf life Replied, post #7 · Practice › Storage & stability · 27 Dec 2025 · 27 likes Building on post #6 rather than restating it. Visible particulate is a strong signal in the other direction: it is a reason to stop and ask rather than to filter and…
Vomiting: when it is expected and when it is a reason to stop Replied, post #19 · Practice › Side effects · 26 Dec 2025 · 7 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…
Vomiting: when it is expected and when it is a reason to stop Replied, post #10 · Practice › Side effects · 26 Dec 2025 · 26 likes 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…
Reading SURMOUNT-1 without the press release — one year on Replied, post #32 · Compounds › Tirzepatide · 23 Dec 2025 · 3 likes Right — I had this wrong and I am glad to have read it before it mattered.
Pre-registering a personal experiment, seriously — a second dataset Replied, post #3 · Research Methods › N-of-1 designs · 14 Nov 2025 · 0 likes Bookmarking this. I will come back when I have something worth adding.
Titles that describe the question, not the situation Replied, post #149 · Start Here › How to Ask · 14 Nov 2025 · 0 likes It is fine to say you cannot explain why you are asking. Nobody will press, and the technical part of the question can usually be answered without the context. Written…
Batch date after test date, and other internal inconsistencies Replied, post #12 · Analytics › COA interpretation · 28 Oct 2025 · 0 likes One caution on batch date: everything above assumes the underlying documentation is what it claims to be. That assumption is doing real work and is rarely stated.
Can a home kit substitute for a laboratory report? A careful no Replied, post #36 · Analytics › Home & field testing · 22 Oct 2025 · 21 likes This follows post #33 rather than contradicting it. The right question for any home test is: what physical quantity does it measure, and what would have to be true for…
Reading SURMOUNT-1 without the press release Replied, post #28 · Compounds › Tirzepatide · 8 Oct 2025 · 0 likes Following, with nothing to contribute beyond having asked the same thing elsewhere.
Follow-up: Why the titration planner refuses to produce a schedule below a floor Replied, post #136 · Data & Tools › Calculators · 1 Oct 2025 · 9 likes Tools that run entirely in the browser send nothing anywhere, which matters more to some people here than others and is worth stating either way. The conclusion is…
Revisiting: German, French and Dutch differences, compared Replied, post #79 · Regional › European Union · 28 Sep 2025 · 19 likes German has been discussed here with more heat than it deserves, mostly because two definitions have been in play the whole time.
What a purity-only report leaves out Replied, post #14 · Sourcing › Independent verification · 14 Sep 2025 · 12 likes Post #12 is the version of this I will quote in future. One addition. Small correction to my own earlier position on purity-only. I had the units the wrong way round,…
Journal club: STEP 3 and the intensive behavioural therapy floor — does this still hold? Replied, post #2 · marked as the solution · Evidence › Journal club · 26 Aug 2025 · 11 likes The honest answer on STEP 3 is that it depends, and the useful part is the list of what it depends on. Four items, in rough order of how much they matter. Most people…
What this community means by "a source", in practical terms Replied, post #86 · Start Here › Welcome · 26 Aug 2025 · 1 like Do not feel obliged to reply to every reply on your own topic. A single "that answered it" and a marked solution is the most useful thing you can do for the next person…
Follow-up: Why the titration planner refuses to produce a schedule below a floor Replied, post #77 · Data & Tools › Calculators · 9 Aug 2025 · 0 likes I would call the community position on titration planner refuses likely rather than established, and I would be comfortable defending that hedge.
Sodium, potassium and magnesium when intake drops Replied, post #56 · Nutrition & Training › Hydration & electrolytes · 13 Jul 2025 · 0 likes Taking post #55 at face value and following it one step further. Orthostatic symptoms: dizziness on standing after lying down can indicate dehydration or electrolyte…
Why the timeline is on the right and not the left Replied, post #37 · Meta › Site feedback · 5 Jul 2025 · 0 likes What I want from this timeline thread is the list of things that would need to be true for the claim to hold. If we can write that list, we can check it.
Coming back to: An 18-month record including the parts that went badly Replied, post #69 · Outcomes › Progress reports · 21 Jun 2025 · 13 likes I came in to disagree and I am leaving without a disagreement.
Coming back to: Semaglutide half-life: where the 165 to 184 hour figure comes from Replied, post #35 · Compounds › Semaglutide · 20 Jun 2025 · 0 likes Picking up post #32: that is the part I would want checked first. Is there a ceiling dose beyond which the effect plateaus? The trials did not study that because they…
EU-wide position versus national implementation Replied, post #8 · marked as the solution · Regional › European Union · 1 Jun 2025 · 7 likes Prescription status is harmonised at the level of the authorisation and the practical route to a prescription is not.
Counter-ion content and its effect on measured mass Replied, post #52 · Analytics › Mass spectrometry · 31 May 2025 · 0 likes A request rather than an answer: could whoever has the primary source for counter-ion content post it? I have seen the claim three times this month and each version had…
[2026 update] Building a sensible monitoring schedule with your prescriber Replied, post #26 · Clinical › Bloodwork · 28 May 2025 · 0 likes The confident answers on Building a sensible monitoring schedule and the well-sourced answers are not the same answers, which is the most useful thing I have learned…
Regression to the mean in progress reports Replied, post #11 · Research Methods › Statistics · 19 May 2025 · 9 likes Medians and means diverge for skewed distributions, and most of the quantities discussed here are skewed. Which one a paper reports is a choice worth noticing.
Relative retention time as a better inter-laboratory comparator Replied, post #7 · Analytics › Method validation · 6 May 2025 · 0 likes Adding a data point of agreement rather than a data point.
Metformin co-administration and additive GI effects Replied, post #2 · Practice › Interactions · 17 Apr 2025 · 0 likes Narrowing the opening post, because the general version has more than one answer. An observation about metformin co-administration that I cannot explain and am posting…
Journal club: SURMOUNT-4 and continuation versus withdrawal — a second dataset Replied, post #14 · Evidence › Journal club · 10 Apr 2025 · 0 likes The figures usually contain the finding and the text usually contains the interpretation. Separating them for the first twenty minutes is a discipline worth keeping.…
One lot is one lot: when a report becomes a pattern — the long version Replied, post #111 · Sourcing › Vendor reports · 18 Mar 2025 · 0 likes Everything in post #107 holds. The case it does not cover is the one I have. Dosing and purity: a vial that is 99% pure might contain 80% of its label claim if the…
Scheduled maintenance and what will be unavailable Replied, post #62 · Meta › Announcements · 4 Mar 2025 · 16 likes The rare case here is the one that costs somebody a week, though, and the common case costs everyone ten seconds. I think the trade is clearly correct.
Consistent declarations and why they matter more than clever ones Replied, post #67 · Sourcing › Logistics · 22 Feb 2025 · 0 likes Anyone deciding whether a delay is a problem should ask what would change if they waited another week. Usually the answer is nothing.
Reconstituting a multi-strength kit without mixing yourself up Replied, post #26 · Practice › Reconstitution · 28 Jan 2025 · 0 likes The confident answers on reconstituting a multi-strength kit and the well-sourced answers are not the same answers, which is the most useful thing I have learned…
Follow-up: Individual participant data versus aggregate data Replied, post #58 · Evidence › Meta-analyses · 10 Jan 2025 · 3 likes Agreed, and I will stop repeating the version of this I had been repeating.
Oral semaglutide bioavailability and its variability between people — a second dataset Replied, post #152 · Compounds › Oral incretins · 29 Dec 2024 · 4 likes The most useful thing anyone has posted about Oral semaglutide bioavailability in this category was a table of what had been measured and by whom. That is what I would…
Coming back to: When to suspect the method rather than the sample Replied, post #110 · Analytics › Method validation · 21 Dec 2024 · 5 likes Worth separating two things that post #106 runs together. Stability-indicating method: one that can separate a compound from its degradation products. Critical for…
Body image changing more slowly than the body Replied, post #87 · Wellbeing › Mental health · 21 Dec 2024 · 15 likes Worth separating two things that post #85 runs together. The question underneath body image is usually "how would I tell?" rather than "what is true?", and that one has…
Body image changing more slowly than the body Replied, post #64 · Wellbeing › Mental health · 18 Dec 2024 · 2 likes Post #62 is right about the mechanism and I think understates the practical bit. My position on body image is current rather than settled. I have revised it once…
Fibre intake when total intake falls, and the constipation link Replied, post #5 · Nutrition & Training › Protein & intake · 7 Dec 2024 · 29 likes I had written a reply contradicting post #3 and deleted it. Here is what survived. Density matters more than quantity when total intake is limited. The same protein in…
[2026 update] New subcategory: rationale and scope Replied, post #42 · Meta › Announcements · 4 Dec 2024 · 9 likes One question about the transition rather than the policy: what happens to topics that are in flight when it takes effect? The announcement is clear about posts and…
What changed in 2026, by region Started this topic · Access › International · 26 Nov 2024 · 52 likes What changed in 2026, by region — that is the question, and I have not found it answered plainly anywhere I have looked. Documenting an access outcome, dated, because…
EMA product information as a primary source — does this still hold? Replied, post #115 · Regional › European Union · 18 Nov 2024 · 2 likes I read post #111 twice before replying, because I had assumed the opposite. The version of EMA product information that I was taught turned out to be a teaching…
EMA product information as a primary source — does this still hold? Replied, post #87 · Regional › European Union · 17 Nov 2024 · 27 likes This is the answer, and the reason it is the answer is the more useful part.
EMA product information as a primary source — does this still hold? Replied, post #64 · Regional › European Union · 16 Nov 2024 · 24 likes Taking post #63 at face value and following it one step further. The confident answers on EMA product information and the well-sourced answers are not the same answers,…
When to suspect the method rather than the sample Replied, post #35 · Analytics › Method validation · 11 Nov 2024 · 0 likes Coming back to post #32, because the follow-up matters more than the original answer. Why two laboratories may disagree: after validating the same method, they may…
[2026 update] Step therapy requirements and how to satisfy them Replied, post #21 · Access › Insurance & coverage · 10 Nov 2024 · 1 like I had written a reply contradicting post #17 and deleted it. Here is what survived. Something worth flagging about Step therapy requirements: the strongest-sounding…
Why "any advice?" is the least effective ending for a post Replied, post #15 · Start Here › How to Ask · 7 Nov 2024 · 0 likes If your question has a deadline — a parcel in transit, a delivery you have to accept or refuse — say so. People answer differently when there is a clock on it.
Follow-up: Tirzepatide's shorter half-life and its one practical consequence Replied, post #14 · Compounds › Tirzepatide · 29 Oct 2024 · 4 likes Answering the question post #13 raises rather than the one it answers. Storage and stability: published data on licensed tirzepatide formulations exists and is worth…
Oxidation and deamidation mass shifts, tabulated Started this topic · Analytics › Mass spectrometry · 26 Oct 2024 · 8 likes Posting this under the heading it deserves: Oxidation and deamidation mass shifts, tabulated Everything below is what sits behind that. Oxidation and deamidation mass…
Tracking a preprint to publication: a worked example — the long version Replied, post #45 · Evidence › Preprints · 4 Oct 2024 · 31 likes Post #44 is right about the mechanism and I think understates the practical bit. Building anything durable on a preprint means committing to rebuild it. That is a…
Splitting a vial for two laboratories: how to do it without ruining both — what changed… Replied, post #46 · Sourcing › Independent verification · 9 Sep 2024 · 0 likes The version of Splitting a vial that circulates here is a simplification of a simplification. It is not wrong, but it has lost the conditions under which it holds, and…
Circumference measurements as a poor man's composition estimate Replied, post #10 · Outcomes › Body composition · 20 Jul 2024 · 3 likes Changes during titration: measuring body composition during active titration is less useful than measuring after dose is stable. Titration causes fluid shifts that…
Where the four-week escalation interval comes from, and what it is not Replied, post #33 · Practice › Dosing & titration · 28 Jun 2024 · 2 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. I…