g.tamm

TL2 · Palermo

Contributes reviews on supplier material. Based in Palermo.

Joined 19 April 2025 · last posted 11h

83 posts, newest first. Showing up to 150.

Comparing my trajectory with the trial curves, carefully — a second dataset Replied, post #82 · Outcomes › Progress reports · 27 Jul 2026 · 0 likes Maintenance series are the ones this subcategory needs most and receives least. The interesting questions all change once loss stops.
Coming back to: Preparing for an appointment: one page, three questions Replied, post #45 · Clinical › Prescriber conversations · 24 Jul 2026 · 0 likes I read post #41 twice before replying, because I had assumed the opposite. Prescription logistics: confirm whether it will be filled locally, requires mail order, or…
Deletion sequences: expected mass shifts by residue — the long version Replied, post #21 · Analytics › Impurities & related substances · 23 Jul 2026 · 0 likes Oxidation at methionine or tryptophan adds sixteen per oxygen and typically elutes earlier. In aged material it is the modification that grows. I would be glad to be…
Request: a per-category review queue Replied, post #122 · Meta › Feature requests · 22 Jul 2026 · 8 likes Practical answer on per-category review queue, since the theoretical one is upthread: do the simplest check first, write down the result, and only then decide whether…
Hair shedding at month three: mechanism and time course — the long version Replied, post #49 · Practice › Side effects · 18 Jul 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…
Which categories are strict and which are relaxed, honestly Replied, post #25 · Start Here › Welcome · 18 Jul 2026 · 0 likes The Lounge is a real category rather than a dumping ground. The sourcing rule still applies there, which surprises people, but the register is looser and nobody minds a…
Semaglutide and gastric emptying — the mechanism behind most of the side-effect profile Replied, post #101 · Compounds › Semaglutide · 12 Jul 2026 · 0 likes Coming back to post #97, because the follow-up matters more than the original answer. On identity confirmation: a mass close to 4113.6 Da on the intact molecule is…
Receptor desensitisation as a tolerance hypothesis, and its weak evidence Replied, post #33 · Pharmacology › Receptor biology · 2 Jul 2026 · 5 likes Receptor occupancy required for a clinical effect is not the same as full occupancy, and dose-response curves flattening at the top is what you would expect from that.…
How shortages have affected compounding permissions Replied, post #5 · Access › Shortages · 29 Jun 2026 · 21 likes Where I part company with the opening post, and it is a narrow parting. Patient advocacy during shortages: some advocacy groups advocate for patients during shortages.…
Personal or family history of medullary thyroid carcinoma Replied, post #14 · Safety › Contraindications · 25 Jun 2026 · 0 likes I had written a reply contradicting post #12 and deleted it. Here is what survived. Allergy to the specific compound: true allergy is rare but possible. Any prior…
Journal club: STEP 1 and the treatment-policy estimand — does this still hold? Replied, post #47 · Evidence › Journal club · 21 Jun 2026 · 2 likes Reading back through, this was answered upthread and I missed it. My fault.
Revisiting: The report format the maintainers ask for, and why each field is there Replied, post #86 · Sourcing › Vendor reports · 18 Jun 2026 · 10 likes Post #82 put the caveat in the right place and I want to underline it. Dosing and purity: a vial that is 99% pure might contain 80% of its label claim if the other mass…
Carryover and the ghost peak from last week's standard — what changed since Replied, post #28 · Analytics › HPLC & UHPLC · 13 Jun 2026 · 0 likes Area percent is a proportion of absorbance, not a proportion of mass. Two species with different extinction coefficients at the detection wavelength contribute…
Second pass at: Sleep apnoea improving and the equipment implications Replied, post #55 · Wellbeing › Sleep · 9 Jun 2026 · 0 likes Answering the question post #51 raises rather than the one it answers. Fatigue during the day and poor sleep at night are different problems with different causes and…
Official shortage notices and what they authorise Replied, post #79 · Access › Shortages · 31 May 2026 · 5 likes Shortage-driven price movement is real and is a separate question from availability.
Tracking semaglutide's approved indications across jurisdictions, dated Replied, post #8 · Compounds › Semaglutide · 28 May 2026 · 31 likes Semaglutide versus liraglutide in STEP 8: semaglutide produced greater weight reduction and the discontinuation rates differed. But the trial was open-label for the…
Follow-up: Sleep quality changes during weight loss Replied, post #25 · Wellbeing › Sleep · 18 May 2026 · 9 likes Taking post #24 at face value and following it one step further. Sleep quality changes during weight is well covered in the tag pages, and the older discussions are…
GLP-1 receptor distribution: central and peripheral Replied, post #50 · Pharmacology › Receptor biology · 15 May 2026 · 2 likes Adding what did not work for me on GLP-1 receptor distribution, since the failures never get written up and they are half the useful information.
The 2.5 mg starting dose is not a therapeutic dose — why that matters Replied, post #118 · Compounds › Tirzepatide · 10 May 2026 · 11 likes Two claims get bundled together under 2.5 mg starting dose and they need separating. The descriptive one — this is what was observed — is usually well supported. The…
CJC-1295 with and without DAC: what the modification does Replied, post #29 · Compounds › Secretagogues & GH axis · 8 Apr 2026 · 2 likes Adding a reference point for CJC-1295. Mine is a single case, collected without controls, and I am posting the method alongside it so it can be discounted appropriately.
Coming back to: A community side-effect dataset, with its response rate and biases Replied, post #48 · Data & Tools › Datasets · 7 Apr 2026 · 0 likes Where a dataset is used to support a claim in a maintained document, the version used should be cited. Otherwise the document and the data drift apart silently.
[2026 update] Thyroid function tests during substantial weight change Replied, post #27 · Clinical › Bloodwork · 31 Mar 2026 · 20 likes I changed my mind about Thyroid function tests during substantial after someone here asked me for the source and I could not produce one. That is worth saying out loud…
A supplier who responds to a discrepancy with silence — what changed since Replied, post #22 · Sourcing › Red flags · 27 Mar 2026 · 26 likes The arithmetic in post #19 is right; the assumption feeding it is the part to check. The number people quote for supplier is a central estimate presented without its…
An ABAB design with a data table and honest limitations — a second dataset Replied, post #75 · Research Methods › N-of-1 designs · 17 Mar 2026 · 3 likes I had written a reply contradicting post #74 and deleted it. Here is what survived. Designing a personal experiment that could actually change your mind: that is the…
Second pass at: Where impurities in solid-phase peptide synthesis come from Replied, post #43 · Analytics › Impurities & related substances · 25 Feb 2026 · 0 likes The most useful reply I ever got about impurities in solid-phase peptide synthesis was a request to state my units. It sounds like pedantry and it has saved me twice.
Five questions in one post gets you one answer — how to split them Replied, post #16 · Start Here › How to Ask · 20 Feb 2026 · 0 likes Say what you want out of the answer. "I want to know whether to accept this delivery" and "I want to understand the chemistry" get very different and equally valid…
Why "dose equivalence" between different incretin analogues is a weak concept Replied, post #45 · Practice › Dosing & titration · 17 Feb 2026 · 2 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. Where…
Which panel is worth repeating and which is worth ignoring — a second dataset Replied, post #70 · Clinical › Bloodwork · 7 Feb 2026 · 5 likes The useful distinction on panel is between what was measured and what was inferred from it. Both end up in the same sentence and only one of them has error bars.
Coverage in the US: a map of the usual obstacles Replied, post #36 · Regional › North America · 14 Jan 2026 · 0 likes On coverage: the maintained page in the documentation commons covers the general case with citations and a review date, which is more reliable than any reply here…
Half-life, steady state, and accumulation worked through — a second dataset Replied, post #58 · Pharmacology › Pharmacokinetics · 12 Jan 2026 · 3 likes A pharmacokinetic model fitted to trial data describes the population studied. Applying it to somebody outside the enrolled range is an extrapolation, and the model…
The most useful thing you learned here that was not the answer you came for Replied, post #13 · Lounge › Off topic · 9 Jan 2026 · 29 likes Something I have wondered without ever asking: is there a good reason the vocabulary in this field is so inconsistent between suppliers? Half the disagreements here…
A partial dose because the pen emptied mid-injection Replied, post #9 · marked as the solution · Practice › Administration · 7 Jan 2026 · 8 likes Everything in post #5 holds. The case it does not cover is the one I have. If you have to inject at a different time of day than usual, that is a much smaller…
Documentation that appears only after payment Replied, post #95 · Sourcing › Red flags · 3 Dec 2025 · 2 likes Trying to state the documentation position in a way that someone who disagrees would recognise as fair, because I do not think the version in this thread passes that…
Heterogeneity as information rather than as a nuisance Replied, post #13 · Evidence › Meta-analyses · 1 Dec 2025 · 9 likes Where I part company with post #9, and it is a narrow parting. Study quality and weighting: some meta-analyses weight all studies equally; others weight by study size…
Second pass at: The topic list is dense — is that deliberate? Replied, post #5 · Meta › Site feedback · 20 Nov 2025 · 4 likes No notes. Posting so the count is not one.
Prescription requirements and telehealth models Replied, post #7 · Sourcing › Regulatory · 9 Nov 2025 · 28 likes Prescription requirements and telehealth models is worth one more sentence than it usually gets, and the sentence is the one about how the number was arrived at.
NHS criteria and how they are applied in practice — the long version Replied, post #15 · Regional › UK & Ireland · 3 Nov 2025 · 0 likes NHS access has been restricted by commissioning criteria, not by licensing. Specialist weight-management services in many areas require prior weight-loss attempts, BMI…
Sleep quality changes during weight loss — what changed since Replied, post #42 · Wellbeing › Sleep · 28 Oct 2025 · 0 likes Caffeine and alcohol both affect sleep architecture and both change during a period of reduced intake without anybody deciding to change them. I looked this up rather…
A calculator that gives a right answer to the wrong question — does this still hold? Replied, post #21 · Data & Tools › Calculators · 25 Oct 2025 · 8 likes Before the thread moves on from calculator — what is the sample size behind the claim? I am not being difficult; I have seen the same figure quoted from an n of four…
Follow-up: What a seizure notice actually says Replied, post #9 · Sourcing › Logistics · 24 Oct 2025 · 0 likes Split shipments reduce single-point risk and increase the number of transits. Which trade is right depends on what you are protecting against.
An orphaned page with no inbound links — the long version Replied, post #2 · Meta › Wiki maintenance · 7 Oct 2025 · 0 likes Requesting a review date change rather than a content change. This page is being read far more than it was and the annual cycle is now too slow for it. Take the…
Particulates in a reconstituted solution: identifying the likely source Replied, post #11 · Analytics › Impurities & related substances · 3 Oct 2025 · 0 likes Truncation products: fragments from incomplete synthesis or from degradation. They elute quite differently from the intact peptide because they are much smaller and…
Why oral semaglutide needs an absorption enhancer at all Replied, post #35 · Compounds › Oral incretins · 21 Sep 2025 · 3 likes This follows post #33 rather than contradicting it. Fasting instructions are not optional advice. Taking the tablet with food or with more than a sip of water…
A friction point in the promotion workflow Replied, post #9 · Meta › Site feedback · 2 Sep 2025 · 0 likes Where I part company with post #7, and it is a narrow parting. Reading this friction point thread as someone who came in with a fixed view: the third and seventh…
Semaglutide versus liraglutide head to head: reading STEP 8 carefully Replied, post #50 · Compounds › Semaglutide · 30 Aug 2025 · 11 likes On the injection-day question: the labelling for licensed semaglutide allows the day to be changed provided at least two days separate the two injections. That interval…
Coming back to: What published stability data actually covers, and what it does not Replied, post #126 · Practice › Storage & stability · 29 Aug 2025 · 0 likes What I would check first on published stability data actually covers is whether the thing being measured moved or whether the way of measuring it moved. Those look…
Hypertension improvement and when medication needs revisiting Replied, post #30 · Clinical › Comorbidities · 29 Aug 2025 · 11 likes If you are new and reading this thread for the answer to hypertension improvement: the answer is conditional, the conditions are in the third reply, and the rest of the…
[2026 update] Cold solution and stinging: the simplest fix Replied, post #9 · Practice › Administration · 15 Aug 2025 · 23 likes Cold solution and stinging: warming the vial in your hands for a minute before injection reduces the stinging sensation substantially. This is the simplest thing to try…
A request that was declined, and the reasoning — a second dataset Replied, post #77 · Documentation › Wiki requests · 13 Aug 2025 · 0 likes Say what would make the page wrong. A page whose failure conditions are stated is much easier to review honestly. It is the kind of thing that is obvious once and never…
Research-use-only labelling: what it means and what it does not Replied, post #19 · Sourcing › Regulatory · 6 Aug 2025 · 9 likes On post #17 — agreed on the reasoning, with one qualification. What I would want before treating research-use-only labelling as settled: the method, the sample, and…
Tracking that stops updating and then resumes — the long version Replied, post #3 · Sourcing › Logistics · 5 Aug 2025 · 20 likes Document outcomes rather than forecasting them. A forecast in this category reads as reassurance and is not one. I have changed my mind on this once already, so take it…
[2026 update] Cardiovascular risk: reading the outcome trials as a set Replied, post #78 · Clinical › Comorbidities · 24 Jul 2025 · 17 likes Cardiovascular disease: several compounds have cardiovascular outcome trials. SELECT was in people without diabetes; SUSTAIN 6 was in high-risk diabetes. Absolute…
Coming back to: An 18-month record including the parts that went badly Replied, post #83 · Outcomes › Progress reports · 21 Jul 2025 · 11 likes Post #80 is the version of this I will quote in future. One addition. 18-month record is a good example of a question where the honest answer is boring and the…
Sequence verification for an obscure compound: how it is done Replied, post #99 · Compounds › Other compounds · 20 Jul 2025 · 0 likes Fragment compounds — where the material is part of a larger natural protein — should be identified by sequence rather than by name, because the naming in this space is…
Thyroid function tests during substantial weight change Replied, post #2 · Clinical › Bloodwork · 7 Jul 2025 · 2 likes Marking my uncertainty on thyroid function tests during substantial explicitly. I am confident about the direction, much less confident about the size, and not…
Tirzepatide in type 2 diabetes: the SURPASS programme, summarised honestly Replied, post #129 · Compounds › Tirzepatide · 6 Jul 2025 · 0 likes The useful distinction on tirzepatide in type 2 diabetes is between what was measured and what was inferred from it. Both end up in the same sentence and only one of…
Counter-ion content and its effect on measured mass Replied, post #78 · Analytics › Mass spectrometry · 29 Jun 2025 · 32 likes Oxidation adds sixteen per oxygen and is the most common modification seen in aged material. Its presence in the spectrum is informative about handling as well as…
[2026 update] An appeal that failed, and what I would do differently Replied, post #46 · Access › Insurance & coverage · 10 Jun 2025 · 0 likes Where an exception process exists separately from an appeal, they are different routes with different criteria and using the wrong one loses time.
Second pass at: Trial registration and comparing the protocol with the paper Replied, post #21 · Evidence › Trials · 8 Jun 2025 · 15 likes The estimand: what the trial set out to estimate. Two trials can be identical in structure but estimate different things by using different handling rules for people…
Water content on a certificate and why it changes the arithmetic Replied, post #23 · Analytics › COA interpretation · 16 May 2025 · 7 likes A chromatogram supplied as a small image is legible for peak shape and not for baseline detail. That is enough to sanity-check an integration and not enough to…
Lean mass preservation: what the evidence supports Replied, post #16 · Outcomes › Body composition · 14 May 2025 · 22 likes Two questions I would want answered before drawing anything from the lean mass preservation data above: how were the cases selected, and what happened to the ones that…
Journal club: STEP 1 and the treatment-policy estimand — does this still hold? Replied, post #117 · Evidence › Journal club · 22 Apr 2025 · 23 likes Post #114 is right about the mechanism and I think understates the practical bit. Session format: read the paper before posting. The discussion is much better when…
Journal club: STEP 4 and what a withdrawal design can prove Replied, post #13 · Evidence › Journal club · 22 Mar 2025 · 7 likes Understood. Thank you for being specific about the limits of it.
One lot is one lot: when a report becomes a pattern — the long version Replied, post #61 · Sourcing › Vendor reports · 16 Mar 2025 · 20 likes Nothing to add, except that this is the answer I would give if asked.
Validating a method you did not develop — does this still hold? Replied, post #121 · Analytics › Method validation · 16 Mar 2025 · 23 likes Documented validation is what separates a number from an opinion expressed numerically. That is the whole reason to ask for the procedure identifier rather than the…
Delayed gastric emptying and oral medication absorption: which drugs matter Replied, post #5 · marked as the solution · Practice › Interactions · 2 Mar 2025 · 13 likes Post #2 is right about the mechanism and I think understates the practical bit. The most defensible general position in this subcategory: identify the plausible…
Pharmaceutical compounding rules, summarised from primary sources Replied, post #43 · Sourcing › Regulatory · 1 Mar 2025 · 0 likes If someone has run pharmaceutical compounding rules properly I would rather read that than my own reconstruction of it. Posting mine only because the thread has gone…
Biased agonism: a real phenomenon, an over-used explanation Replied, post #4 · Pharmacology › Receptor biology · 24 Feb 2025 · 17 likes The confident answers on biased agonism and the well-sourced answers are not the same answers, which is the most useful thing I have learned reading this category.
Scheduled maintenance and what will be unavailable Replied, post #48 · Meta › Announcements · 19 Feb 2025 · 0 likes Before the thread moves on from scheduled maintenance — what is the sample size behind the claim? I am not being difficult; I have seen the same figure quoted from an n…
Consistent declarations and why they matter more than clever ones Replied, post #7 · Sourcing › Logistics · 7 Feb 2025 · 3 likes Post #3 describes the usual case. This is about the unusual one. Consistent declarations has a well-known answer and a correct answer, and the interesting work is…
Feature request: should a dose-equivalence tool exist at all? Replied, post #14 · Data & Tools › Calculators · 16 Jan 2025 · 10 likes Significant figures in the output should not exceed what the inputs support. A concentration calculated from a nominal vial mass is not known to four decimal places.
Recovery when intake is low: what to cut first Replied, post #51 · Nutrition & Training › Resistance training · 12 Jan 2025 · 0 likes Frequency: three sessions per week of full-body training is easier to maintain than higher frequencies on an energy deficit. Consistency beats intensity when recovery…
A promotion I argued against, and why I lost Replied, post #52 · Documentation › Doc review · 6 Jan 2025 · 26 likes Review of promoted topics: when a topic is nominated for promotion to a maintained documentation page, the draft is posted here. Community review happens before…
Oxidation pathways for methionine and tryptophan Replied, post #33 · Analytics › Impurities & related substances · 28 Dec 2024 · 30 likes Where I part company with post #31, and it is a narrow parting. Oxidation pathways for methionine has a well-known answer and a correct answer, and the interesting work…
[2026 update] Step therapy requirements and how to satisfy them Replied, post #58 · Access › Insurance & coverage · 7 Dec 2024 · 0 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…
Coming back to: When to suspect the method rather than the sample Replied, post #29 · Analytics › Method validation · 5 Dec 2024 · 11 likes Post #25 and I disagree about the size of the effect, not about the direction. Where a pharmacopoeial monograph exists, a method that follows it inherits a great deal…
When to suspect the method rather than the sample Replied, post #44 · Analytics › Method validation · 1 Dec 2024 · 29 likes Understood. Thank you for being specific about the limits of it.
Requesting a page: what makes a good request — what changed since Replied, post #20 · Documentation › Wiki requests · 9 Oct 2024 · 0 likes Understood, and I withdraw the assumption I opened with.
Type 2 diabetes and the largest part of the evidence base — does this still hold? Replied, post #22 · Clinical › Comorbidities · 6 Oct 2024 · 0 likes The question underneath Type 2 diabetes is usually "how would I tell?" rather than "what is true?", and that one has a method attached to it. Write down what you would…
Splitting a vial for two laboratories: how to do it without ruining both — what changed… Replied, post #55 · Sourcing › Independent verification · 13 Sep 2024 · 6 likes On post #53 — agreed on the reasoning, with one qualification. The four services answer different questions. A documentation review cannot tell you what is in a vial…
Correlation in a self-tracked dataset: what it can support Replied, post #6 · Research Methods › Statistics · 20 Aug 2024 · 0 likes Correlation is a good example of a question where the honest answer is boring and the interesting answers are unsupported. I would go with boring.
Second pass at: Retatrutide dose escalation in the published trials Replied, post #113 · Compounds › Retatrutide · 24 Jul 2024 · 1 like Dose escalation in the published trials: the protocols started at lower doses and escalated by defined steps. The step sizes are documented and they may or may not…
How this community labels and discusses unrefereed work Replied, post #7 · Evidence › Preprints · 7 Jun 2024 · 3 likes Useful. I had the fact and not the reason, which turns out to be the important half.