h.ferrari

TL2 · Kuopio

Contributes reviews on supplier material. Based in Kuopio.

Joined 17 November 2024 · last posted 2d

82 posts, newest first. Showing up to 150.

Ultrasound and skinfolds: operator dependence in practice Replied, post #76 · Outcomes › Body composition · 26 Jul 2026 · 20 likes Adding a reference point for ultrasound and skinfolds. Mine is a single case, collected without controls, and I am posting the method alongside it so it can be…
Follow-up: How compounding permissions changed when supply normalised Replied, post #43 · Sourcing › Regulatory · 19 Jul 2026 · 0 likes Worth separating two things that post #39 runs together. Compounding permissions sits at the boundary between what this community can usefully discuss and what it…
Comparing my trajectory with the trial curves, carefully — a second dataset Replied, post #77 · Outcomes › Progress reports · 18 Jul 2026 · 0 likes Useful. I had the fact and not the reason, which turns out to be the important half.
Alcohol: what is documented and what is folklore Replied, post #117 · Practice › Interactions · 17 Jul 2026 · 21 likes I disagree with the framing of alcohol above, and I think it is a substantive disagreement rather than a terminological one. Setting out why, so it can be checked. The…
Journal club: SUSTAIN 6 and its retinopathy signal Replied, post #65 · Evidence › Journal club · 15 Jul 2026 · 0 likes What I would check first on SUSTAIN 6 is whether the thing being measured moved or whether the way of measuring it moved. Those look identical in a graph.
Athletes in weight-category sports: a different risk calculus Replied, post #22 · Clinical › Special populations · 12 Jul 2026 · 11 likes Agreed on athletes in weight-category sports, with one qualification that I think matters. The reasoning holds for the case as described. Change the starting assumption…
Coming back to: A community side-effect dataset, with its response rate and biases Replied, post #92 · Data & Tools › Datasets · 7 Jul 2026 · 8 likes The most useful dataset this community could hold is boring: lot, supplier, service, method, date, result. That is enough to answer most of the questions people ask…
Research-use-only status: what it means legally and practically Replied, post #65 · Compounds › Other compounds · 27 Jun 2026 · 4 likes Worth separating two things that post #61 runs together. Thymosin alpha-1 has a regulatory history in several jurisdictions and a real clinical literature, which puts…
Follow-up: Signs of dehydration worth acting on Started this topic · Safety › Adverse events · 18 Jun 2026 · 30 likes Posting this under the heading it deserves: Signs of dehydration worth acting on Everything below is what sits behind that. A follow-up question about Signs of…
Tracking a shortage from primary sources rather than rumour Replied, post #55 · Access › Shortages · 17 Jun 2026 · 0 likes The most useful contribution is a link to the current official notice rather than an account of one pharmacy. Written in the hope of being told what I have missed.
A reconstituted vial's beyond-use date and the reasoning behind common figures Replied, post #78 · Practice › Storage & stability · 7 Jun 2026 · 10 likes Picking up post #75: that is the part I would want checked first. Freezing a reconstituted peptide solution is not automatically protective. Freeze-thaw cycling is one…
Reading a home test result without over-claiming Replied, post #40 · Analytics › Home & field testing · 12 May 2026 · 0 likes Nothing available at home distinguishes a correct sequence from a closely related incorrect one. That gap is fundamental rather than a matter of kit quality. Worth…
Coming back to: What the published dose-response for semaglutide actually looks like… Replied, post #21 · Compounds › Semaglutide · 11 May 2026 · 5 likes Where I part company with post #19, and it is a narrow parting. Renal outcomes moved this compound out of the metabolic-only conversation. FLOW reported on kidney…
Coming back to: Why a preprint's supplementary material is often the best part Replied, post #44 · Evidence › Preprints · 3 May 2026 · 0 likes Peer review catches some things reliably — missing methods, unsupported conclusions, statistical mistakes of the obvious kind — and misses others routinely. Knowing…
Step therapy requirements and how to satisfy them Replied, post #6 · Access › Insurance & coverage · 25 Apr 2026 · 30 likes The confident answers on step therapy requirements and the well-sourced answers are not the same answers, which is the most useful thing I have learned reading this…
Why a compound being unapproved is not the same as being illegal to possess Replied, post #79 · Sourcing › Regulatory · 18 Apr 2026 · 8 likes Compounding and pharmacy rules: some jurisdictions allow a pharmacy to compound a drug that is not on the market under specific conditions. The conditions are strict…
Reference intervals: how they are constructed and why one in twenty flags Replied, post #82 · Clinical › Bloodwork · 17 Apr 2026 · 0 likes Time of day: some biomarkers vary across the day. Cortisol in the morning differs from cortisol in the evening. Comparing results from different times of day is…
Adducts: sodium, potassium, and the peak you did not expect — does this still hold? Replied, post #90 · Analytics › Mass spectrometry · 31 Mar 2026 · 27 likes Adding a reference point for Adducts. Mine is a single case, collected without controls, and I am posting the method alongside it so it can be discounted appropriately.
An ABAB design with a data table and honest limitations — a second dataset Replied, post #112 · Research Methods › N-of-1 designs · 28 Mar 2026 · 5 likes One more thing on ABAB design that took me far too long to see: the two figures people quote are not measuring the same quantity. Once you notice that, the apparent…
[2026 update] Composite endpoints and the component doing the work Replied, post #42 · Evidence › Trials · 24 Mar 2026 · 1 like Multiplicity and multiple comparisons: if a trial tests many hypotheses, the chance of a false positive on at least one by random chance increases. This is why…
Journal club: indirect comparison between two programmes, defended and attacked Replied, post #15 · Evidence › Journal club · 24 Mar 2026 · 26 likes This follows post #14 rather than contradicting it. The baseline characteristics table is the single most useful page for the questions that get asked here, because it…
Reference intervals: how they are constructed and why one in twenty flags Replied, post #63 · Clinical › Bloodwork · 12 Mar 2026 · 3 likes Reference intervals are constructed to contain the central ninety-five per cent of a reference population, so one healthy person in twenty falls outside one by…
Designing a personal experiment that could change your mind — one year on Replied, post #19 · Research Methods › N-of-1 designs · 10 Mar 2026 · 8 likes Following this. I have the same question and no better information than the first post.
A calculator that gives a right answer to the wrong question Replied, post #8 · Data & Tools › Calculators · 4 Mar 2026 · 1 like Taking calculator seriously for a moment rather than deflecting: the honest position is that the community has observations and no controlled comparison, and those two…
The lowest dose that does anything: is that a real question? Replied, post #35 · Practice › Dosing & titration · 3 Mar 2026 · 18 likes Going back down a step is not a failure and the trials allowed it. Several protocols permitted a return to the previous dose for tolerability and then a second attempt…
Five questions in one post gets you one answer — how to split them Replied, post #19 · Start Here › How to Ask · 25 Feb 2026 · 0 likes Five questions is well covered in the tag pages, and the older discussions are better than the recent ones because they were argued out properly. Worth twenty minutes…
[2026 update] A rising related-substance total over six months: degradation or method… Replied, post #78 · Analytics › Impurities & related substances · 20 Feb 2026 · 1 like The honest reading of a purity figure: it is an upper bound on how much of what the method could see was the intended species, under one integration convention, on one…
Chain of custody for a sample you posted yourself — one year on Replied, post #2 · Sourcing › Independent verification · 26 Jan 2026 · 18 likes A supplier's own certificate is not independent. It can be posted, it is useful, and it is labelled for what it is. It is the kind of thing that is obvious once and…
Trifluoroacetate content and its consequences Replied, post #4 · Analytics › Impurities & related substances · 21 Jan 2026 · 0 likes Aggregates may be a multiple of the monomer mass and may not elute at all under a standard method. What does not come off the column does not appear in the area…
Follow-up: A supplier that answers analytical questions with restated claims Replied, post #51 · Sourcing › Red flags · 15 Jan 2026 · 5 likes An honest declaration on supplier: I have a prior here and it is strong enough that you should weight what I say downward. Stating it rather than hiding it.
A parcel stationary at a customs facility for nine days Replied, post #16 · Sourcing › Logistics · 31 Dec 2025 · 31 likes Documentation after arrival: photograph the parcel and its contents on arrival. If something later turns out wrong (damage, loss, wrong item) you have evidence of the…
Documentation that appears only after payment Replied, post #103 · Sourcing › Red flags · 11 Dec 2025 · 0 likes The arithmetic on documentation is the easy part and it is where the errors are, which is an uncomfortable combination. Show your working and someone will catch it.
Tracking a preprint to publication: a worked example Replied, post #22 · Evidence › Preprints · 1 Dec 2025 · 0 likes Where a preprint contradicts a published trial, the prior should favour the trial. Where it extends one, the preprint can be genuinely useful.
Follow-up: The decimal-point error, and the habit that catches it Replied, post #110 · Practice › Reconstitution · 1 Dec 2025 · 13 likes Post #107 answers the question as asked. The question underneath it is different. Preservative effectiveness is tested against a defined microbial challenge under…
Why an oral GLP-1 agonist is a formulation achievement more than a chemistry one Replied, post #65 · Compounds › Oral incretins · 28 Nov 2025 · 2 likes Worth separating two things that post #61 runs together. Oral versus injectable exposure: comparing a 14 mg oral dose with a 0.5 mg injectable dose is comparing apples…
Substitution between formats during a shortage Replied, post #100 · Access › Shortages · 21 Nov 2025 · 0 likes Both are useful and different. The notice tells you the national position; the account tells you what is happening on the ground. Reading it back, the second half…
Search filters: what is missing Replied, post #4 · Meta › Site feedback · 19 Nov 2025 · 3 likes Picking up post #3: that is the part I would want checked first. Where I have landed on search filters, having got it wrong once in public: the direction is clear, the…
Second pass at: Programming during a large energy deficit Replied, post #85 · Nutrition & Training › Resistance training · 17 Nov 2025 · 8 likes Post-weight-loss training: once weight loss is complete and energy deficit ends, training can shift to building again. The transition from preservation mode to building…
Second pass at: Metformin co-administration and additive GI effects Replied, post #7 · Practice › Interactions · 17 Nov 2025 · 0 likes Nothing to add on the substance. Thank you for taking the question at face value.
EMA product information as a primary source Replied, post #50 · Regional › European Union · 10 Nov 2025 · 4 likes France: ANSM implements EU framework. Reimbursement has been narrower for weight management. Prescribing restrictions were applied during shortages, directing available…
Revisiting: Why tirzepatide titration schedules have more steps than semaglutide's Replied, post #15 · Compounds › Tirzepatide · 7 Nov 2025 · 1 like Comparisons between the tirzepatide and semaglutide programmes across trials rather than within one are weak. Different populations, different durations, different…
Cross-border purchase rules within the EU Replied, post #28 · Regional › European Union · 23 Oct 2025 · 2 likes On post #26 — agreed on the reasoning, with one qualification. Date every claim. Positions in this subcategory have moved repeatedly and the archive keeps posts…
A calculator that gives a right answer to the wrong question — does this still hold? Replied, post #19 · Data & Tools › Calculators · 17 Oct 2025 · 12 likes A request rather than an answer: could whoever has the primary source for calculator post it? I have seen the claim three times this month and each version had lost a…
Second pass at: Journal club: STEP 4 and what a withdrawal design can prove Replied, post #78 · Evidence › Journal club · 13 Oct 2025 · 19 likes What I would check first on STEP 4 is whether the thing being measured moved or whether the way of measuring it moved. Those look identical in a graph.
Documentation that appears only after payment Replied, post #45 · Sourcing › Red flags · 10 Oct 2025 · 1 like What I can speak to on documentation is narrow, so I will keep it narrow rather than generalising from it. Beyond that boundary I do not know.
How to read a forest plot, properly, from scratch Replied, post #36 · Evidence › Trials · 4 Oct 2025 · 15 likes A treatment-policy estimand asks what happens to people assigned to a strategy, including those who abandon it. A hypothetical estimand asks what would have happened…
Managing an unplanned gap in supply — what changed since Replied, post #75 · Access › Shortages · 30 Sep 2025 · 10 likes Worth separating two things that post #73 runs together. Device availability and compound availability are separate supply chains and the device is frequently the…
Thyroid function tests during substantial weight change Replied, post #61 · Clinical › Bloodwork · 14 Sep 2025 · 24 likes I think the thyroid function tests during substantial question is answerable and has not been answered, which is a more optimistic position than most of this thread.
[2026 update] Scheduled maintenance and what will be unavailable Replied, post #9 · Meta › Announcements · 1 Sep 2025 · 0 likes The edit is clearer. For anyone arriving now, read the edited version — the confusion in the replies above is about wording that no longer exists. Genuinely open to…
Comparing two chromatograms from different laboratories, properly Replied, post #7 · Analytics › HPLC & UHPLC · 31 Aug 2025 · 3 likes Carryover from a previous injection shows up as a small peak at the same retention time in a blank. A method report that includes a blank injection is telling you the…
The CagriSema phase 2 paper and what a fixed combination buys Replied, post #89 · Compounds › Cagrilintide & amylin analogues · 26 Aug 2025 · 17 likes Post #88 is the version of this I will quote in future. One addition. Published human data on cagrilintide alone is thinner than on the combination, which is the…
What a 2 ppm match establishes, and what it does not Replied, post #44 · Analytics › Mass spectrometry · 22 Aug 2025 · 0 likes Calibration state at the time of the run determines whether the ppm figure means anything. A report that states when the instrument was last calibrated is unusual and…
Travel coolers and how long they really hold Replied, post #38 · Devices › Cold chain · 3 Aug 2025 · 7 likes Narrowing post #37, because the general version has more than one answer. I read the earlier replies on travel coolers twice before writing this, because I had assumed…
A comparison of home results against a laboratory result on the same vial Replied, post #20 · Analytics › Home & field testing · 1 Aug 2025 · 12 likes Documenting home checks with dates and lots makes them accumulate into something. Undocumented ones evaporate and get remembered selectively.
A field-by-field walk through a certificate of analysis Replied, post #124 · Analytics › COA interpretation · 18 Jul 2025 · 4 likes Where I would push back on the field-by-field walk through a certificate consensus is the confidence, not the direction. The direction looks right. The confidence is…
Amylin analogue mechanism: satiety signalling separate from GLP-1 Replied, post #131 · Compounds › Cagrilintide & amylin analogues · 10 Jun 2025 · 11 likes No disagreement from me. Posting only so the question does not look ignored.
Follow-up: History of disordered eating and why it changes the conversation Replied, post #21 · Clinical › Special populations · 9 Jun 2025 · 5 likes Gastroparesis: pre-existing severe delayed gastric emptying can worsen with compounds that slow it further. Discussion with a clinician is prudent if this history…
Reading a supplier's product description as a marketing document Replied, post #22 · Compounds › Other compounds · 14 May 2025 · 14 likes Why catalogue breadth is not evidence of anything: a supplier listing 500 compounds does not make the 450 untested ones likely to work. It makes them untested compounds…
Reading a trial's population section before its results — does this still hold? Replied, post #59 · Evidence › Trials · 2 May 2025 · 1 like 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),…
Over-dilution: when your dose falls below one readable graduation Replied, post #18 · Practice › Reconstitution · 30 Mar 2025 · 9 likes Picking up post #15: that is the part I would want checked first. Arithmetic step by step: a 5 mg vial with 2 mL of diluent gives (5 mg) / (2 mL) = 2.5 mg/mL. On a…
Asking about a compound your prescriber has not heard of Replied, post #7 · Clinical › Prescriber conversations · 29 Mar 2025 · 9 likes Bringing a record of symptoms with dates and severities makes an assessment materially easier and is the single most useful preparation. I would want to see it done…
Coming back to: Oxidation and deamidation mass shifts, tabulated Started this topic · Analytics › Mass spectrometry · 28 Mar 2025 · 36 likes Oxidation and deamidation mass shifts, tabulated — setting out what I have, and where I think it stops being reliable. Reading back through what has been written here…
Delayed gastric emptying and oral medication absorption: which drugs matter Replied, post #24 · Practice › Interactions · 24 Mar 2025 · 9 likes The practical advice most consistently given by pharmacists here is to keep the timing of other oral medication consistent rather than to change it, because consistency…
Journal club: SURMOUNT-OSA and a hard endpoint in a soft field Replied, post #32 · Evidence › Journal club · 9 Mar 2025 · 0 likes This follows post #31 rather than contradicting it. A note on how SURMOUNT-OSA gets discussed rather than on SURMOUNT-OSA itself: the confident posts get the replies…
What to keep a record of at the point of payment Started this topic · Sourcing › Payments · 8 Mar 2025 · 46 likes What to keep a record of at the point of payment — that is the question, and I have not found it answered plainly anywhere I have looked. A payments question, with the…
Semaglutide half-life: where the 165 to 184 hour figure comes from — what changed since Replied, post #102 · Compounds › Semaglutide · 8 Feb 2025 · 5 likes Picking up post #101: that is the part I would want checked first. Semaglutide's structure is a modified backbone with a C18 diacid attached through a spacer. The…
Tirzepatide in type 2 diabetes: the SURPASS programme, summarised honestly Replied, post #11 · Compounds › Tirzepatide · 27 Jan 2025 · 2 likes Following this. I have the same question and no better information than the first post.
Second pass at: Certificates issued by the seller versus by a laboratory Replied, post #39 · Analytics › COA interpretation · 22 Jan 2025 · 8 likes Adding a note of thanks rather than an opinion. I did not know most of that.
Second pass at: Gauge and length selection for subcutaneous injection Replied, post #19 · Devices › Syringes & needles · 14 Jan 2025 · 1 like Where the Gauge and length selection reasoning breaks down for me is the step from the group result to the individual case. That step is almost never argued for.
Follow-up: Tirzepatide's shorter half-life and its one practical consequence Replied, post #77 · Compounds › Tirzepatide · 8 Dec 2024 · 29 likes Narrowing post #76, because the general version has more than one answer. Categorical response thresholds — the proportion reaching ten, fifteen or twenty per cent…
Washout with a one-week half-life: the arithmetic Replied, post #15 · Research Methods › N-of-1 designs · 25 Nov 2024 · 22 likes The number people quote for washout is a central estimate presented without its interval, and the interval is wide enough that the estimate is nearly uninformative on…
Revisiting: Melanocortin agonists: mechanism and the documented adverse profile Replied, post #137 · Compounds › Other compounds · 23 Nov 2024 · 1 like Melanocortin agonists sits at the boundary between what this community can usefully discuss and what it cannot, and I think it falls on the discussable side, narrowly.
Two sessions a week versus four: what the evidence supports Replied, post #8 · Nutrition & Training › Resistance training · 19 Nov 2024 · 4 likes A resistance stimulus during a deficit is the other half of the lean-tissue argument, and the evidence for it is reasonably strong. I would rather say I do not know…
Converting between mg/mL and units per dose, both directions Replied, post #90 · Practice › Reconstitution · 15 Nov 2024 · 26 likes I read post #86 twice before replying, because I had assumed the opposite. Preservative effectiveness is tested against a defined microbial challenge under defined…
US compounding rules and how they changed Replied, post #50 · Regional › North America · 31 Oct 2024 · 13 likes Shortage status determines what compounding is permitted in some jurisdictions, which is why the availability question and the compounding question are linked. The rule…
Research-use-only status: what it means legally and practically — a second dataset Replied, post #10 · Compounds › Other compounds · 28 Oct 2024 · 0 likes The arithmetic in post #8 is right; the assumption feeding it is the part to check. Thymosin alpha-1 has a regulatory history in several jurisdictions and a real…
Journal club: SURPASS-2 and the semaglutide 1 mg comparator Replied, post #73 · Evidence › Journal club · 14 Oct 2024 · 7 likes Coming back to post #69, because the follow-up matters more than the original answer. SURPASS-2 looks different depending on whether you are reading the primary…
Research-use-only labelling: what it means and what it does not — the long version Replied, post #9 · Sourcing › Regulatory · 9 Oct 2024 · 3 likes Picking up post #8: that is the part I would want checked first. Labelling and intended use: a compound sold as "research-use-only" does not change its pharmacology if…
Second pass at: Sodium, potassium and magnesium when intake drops Replied, post #56 · Nutrition & Training › Hydration & electrolytes · 24 Aug 2024 · 0 likes I read post #52 twice before replying, because I had assumed the opposite. Constipation and hydration: dehydration makes constipation worse. Increasing fluid intake is…
High-resolution MS on aggregates and what it can see — one year on Replied, post #22 · Analytics › Mass spectrometry · 14 Aug 2024 · 1 like Adding the measurement that post #21 says would settle it. What I would tell a new member reading about High-resolution for the first time: the confident posts are not…
Second pass at: Retatrutide dose escalation in the published trials Replied, post #120 · Compounds › Retatrutide · 24 Jul 2024 · 3 likes What we do not know about retatrutide, listed explicitly: long-term safety, real-world response rates, the dose response in diverse populations, whether the heart-rate…
Splitting a weekly dose in two: the pharmacokinetic argument against — the long version Replied, post #136 · Practice › Dosing & titration · 10 Jul 2024 · 17 likes Worth separating two things that post #132 runs together. If symptoms reset at each step, that is the expected pattern rather than a sign that the previous adaptation…