k.haddad

TL2 · Osijek

Contributes reviews on supplier material. Based in Osijek.

Joined 15 March 2025 · last posted 9d

85 posts, newest first. Showing up to 150.

Muscle cramps: the ordinary causes before the exotic ones — a second dataset Replied, post #60 · Practice › Side effects · 19 Jul 2026 · 18 likes Fatigue: commonly reported, frequently multifactorial. It is worth asking whether other factors have changed (sleep, training volume, diet adequacy, hydration) before…
Tracking a shortage from primary sources rather than rumour Replied, post #105 · Access › Shortages · 16 Jul 2026 · 0 likes Where the tracking a shortage reasoning breaks down for me is the step from the group result to the individual case. That step is almost never argued for.
Pooling trials with different estimands Replied, post #89 · Evidence › Meta-analyses · 11 Jul 2026 · 0 likes Overlapping populations across included trials inflate the apparent sample size. It happens more than people expect where the same programme reports multiple papers.…
What a certificate commits its issuer to — one year on Replied, post #105 · Analytics › COA interpretation · 8 Jul 2026 · 21 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…
Shakes versus food: a pragmatic assessment Replied, post #21 · Nutrition & Training › Protein & intake · 3 Jul 2026 · 0 likes Posting my shakes versus food numbers with the method attached so they can be discounted properly. Uncontrolled, unblinded, and collected by someone who wanted a…
Follow-up: Reading an interaction checker output critically Replied, post #24 · Practice › Interactions · 29 Jun 2026 · 1 like Confirming post #23 from a second method, which matters more than confirming it from a second person. Anticoagulants: no direct interaction with the compounds in this…
Type 2 diabetes and the largest part of the evidence base — does this still hold? Replied, post #17 · Clinical › Comorbidities · 27 Jun 2026 · 10 likes Where a condition is well controlled and where it is not are different questions and the published data rarely distinguishes them. The mechanism is plausible, which is…
Endotoxin and why it is a separate question from purity — what changed since Replied, post #57 · Analytics › Impurities & related substances · 25 Jun 2026 · 5 likes Where I part company with post #55, and it is a narrow parting. What I would tell a new member reading about Endotoxin for the first time: the confident posts are not…
[2026 update] Interpreting a result that disagrees with the supplier's certificate Replied, post #36 · Sourcing › Independent verification · 23 Jun 2026 · 8 likes Post #33 answers the question as asked. The question underneath it is different. Practical note on Interpreting a result: write down what you expect before you look.…
An appeal that succeeded, with the letter structure — the long version Replied, post #91 · Access › Insurance & coverage · 13 Jun 2026 · 3 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…
GHRH analogues versus ghrelin mimetics: different mechanisms, conflated discussion Replied, post #19 · Compounds › Secretagogues & GH axis · 7 Jun 2026 · 2 likes Answering the question post #15 raises rather than the one it answers. GHRH analogues versus ghrelin mimetics are often conflated but they are different mechanisms.…
[2026 update] Storing lyophilised material long term: what governs the shelf life Replied, post #126 · Practice › Storage & stability · 1 Jun 2026 · 4 likes Clarity is a weak test. A solution can lose a significant fraction of its active content to degradation or adsorption while remaining perfectly clear.
About the Comorbidities category Replied, post #3 · Clinical › Comorbidities · 29 May 2026 · 11 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…
Prescription portability between countries Replied, post #41 · Access › International · 23 May 2026 · 18 likes Genuine question rather than a rhetorical one: has anyone here actually observed prescription portability between countries, as opposed to read about it? The thread is…
Semaglutide and gastric emptying — the mechanism behind most of the side-effect profile Replied, post #12 · Compounds › Semaglutide · 29 Apr 2026 · 1 like I keep a log for semaglutide and gastric emptying specifically because my memory of it turned out to be systematically wrong in one direction. Six weeks of notes cost…
CJC-1295 with and without DAC: what the modification does Replied, post #42 · Compounds › Secretagogues & GH axis · 26 Apr 2026 · 2 likes Post #40 and I disagree about the size of the effect, not about the direction. Posting my CJC-1295 numbers with the method attached so they can be discounted properly.…
Subgroup analyses: pre-specified versus discovered — a second dataset Replied, post #44 · Evidence › Trials · 14 Apr 2026 · 4 likes The documentation on Subgroup analyses is better than this thread and I say that as someone who has posted in the thread.
[2026 update] 0.3 mL versus 0.5 mL versus 1 mL barrels: resolution matters Replied, post #13 · Devices › Syringes & needles · 6 Apr 2026 · 29 likes Post #11 and I disagree about the size of the effect, not about the direction. Sharps containers are a legal requirement for disposal in several jurisdictions and a…
Revisiting: Liver enzymes drifting down and what that usually means Replied, post #17 · Clinical › Bloodwork · 1 Apr 2026 · 4 likes On post #15 — agreed on the reasoning, with one qualification. I would keep Liver enzymes drifting and the decision it usually gets used for separate in this thread.…
Managing an unplanned gap in supply Replied, post #77 · Access › Shortages · 29 Mar 2026 · 7 likes Supply interruptions: official shortage notices are published by regulatory agencies. That is the correct primary source rather than pharmacy rumors or forum discussion.
Second pass at: Identical chromatograms across two different lots Replied, post #79 · Sourcing › Red flags · 20 Mar 2026 · 5 likes I read post #75 twice before replying, because I had assumed the opposite. Reporting something here requires the batch, the date, the method and the document, which is…
Measurement error in home scales, with a worked standard deviation Replied, post #27 · Research Methods › Statistics · 19 Mar 2026 · 1 like Worth separating two things that post #25 runs together. On measurement error in home scales, I would rather understate and be corrected upward than overstate and be…
Choosing which test to pay for, given a fixed budget Replied, post #22 · Sourcing › Independent verification · 12 Mar 2026 · 0 likes Post #18 put the caveat in the right place and I want to underline it. The record shows what was measured. Everything beyond that is inference and this site tries to…
Measurement error in a self-reported exposure Replied, post #15 · Evidence › Study critique · 22 Feb 2026 · 1 like Second this, and I would have said it less carefully.
Coming back to: The SOUL trial and oral semaglutide cardiovascular outcomes Replied, post #103 · Compounds › Oral incretins · 21 Feb 2026 · 0 likes Building on post #102 rather than restating it. On variability: the between-person spread in exposure for oral semaglutide is wide enough that two people on the same…
A history of disordered eating: proceeding carefully Replied, post #73 · Wellbeing › Mental health · 25 Jan 2026 · 19 likes Picking up post #71: that is the part I would want checked first. I think the history of disordered eating question is answerable and has not been answered, which is a…
The headache that turns out to be dehydration Replied, post #148 · Nutrition & Training › Hydration & electrolytes · 21 Jan 2026 · 28 likes This is the first time the answer has come with its own limits attached. Appreciated.
Adducts: sodium, potassium, and the peak you did not expect — does this still hold? Replied, post #12 · Analytics › Mass spectrometry · 19 Jan 2026 · 32 likes Resolution and mass accuracy are different specifications. An instrument can resolve two species and still assign their masses imprecisely, and the reverse is also…
Coming back to: Private prescribing in the UK: what is actually involved Replied, post #26 · Regional › UK & Ireland · 31 Dec 2025 · 10 likes Building on post #24 rather than restating it. Where guidance distinguishes between indications, quoting the indication is essential. The same compound has different…
The decimal-point error, and the habit that catches it Replied, post #83 · Practice › Reconstitution · 17 Dec 2025 · 27 likes Whatever the answer on decimal-point error turns out to be, the method for getting there is the same: state the assumption, do the arithmetic in public, invite the…
Prescription requirements and telehealth models Replied, post #57 · Sourcing › Regulatory · 9 Dec 2025 · 21 likes Generic or biosimilar entry depends on patent and exclusivity positions that are jurisdiction-specific and are frequently misreported. I am confident about the…
Revisiting: Aggregates and why a purity assay may miss them entirely Replied, post #39 · Analytics › Impurities & related substances · 22 Nov 2025 · 0 likes Two claims get bundled together under Aggregates and they need separating. The descriptive one — this is what was observed — is usually well supported. The causal one —…
Freeze-thaw and why one cycle is not the same as five Replied, post #25 · Practice › Storage & stability · 20 Nov 2025 · 15 likes Building on post #24 rather than restating it. A beyond-use date on a home preparation is an inference rather than a measurement. It can be a reasonable inference and…
How to read a phase 2 result without treating it as a phase 3 result Replied, post #5 · Compounds › Retatrutide · 14 Nov 2025 · 17 likes The phase 3 programme is ongoing and its results will change what can be said here. Until then, this subcategory's convention is to state the phase alongside any result…
Micro-titration: a disputed topic, argued properly Replied, post #2 · marked as the solution · Practice › Dosing & titration · 8 Nov 2025 · 7 likes Confirming the opening post from a second method, which matters more than confirming it from a second person. What I would want before treating micro-titration as…
High-resolution MS on aggregates and what it can see Replied, post #112 · Analytics › Mass spectrometry · 5 Nov 2025 · 0 likes Resolution: "high resolution" commonly means
Journal club: the retatrutide phase 2 obesity paper Replied, post #9 · Evidence › Journal club · 4 Nov 2025 · 4 likes TRIUMPH (ongoing): Retatrutide phase 3. No results yet. Nothing should be attributed to it because it has not finished. When it does, this discussion will return to it.…
Power cut for eleven hours: how I assessed it afterwards Replied, post #88 · Practice › Storage & stability · 9 Oct 2025 · 0 likes The practical version of power cut for eleven hours is three sentences long. The rigorous version is three pages and reaches the same conclusion with the conditions…
Payment method and the leverage it gives you, ranked Replied, post #77 · Sourcing › Payments · 25 Sep 2025 · 9 likes Sensible. I would want the same detail before I acted on it either.
Journal club: STEP-HFpEF and symptom endpoints — a second dataset Replied, post #15 · Evidence › Journal club · 23 Sep 2025 · 21 likes Coming back to post #11, because the follow-up matters more than the original answer. Reading order that works for these sessions: registry entry, methods, baseline…
Older adults, sarcopenia risk, and the trade-off nobody quantifies — the long version Replied, post #20 · Clinical › Special populations · 10 Sep 2025 · 25 likes On Older adults, the part that usually goes wrong is that the question is asked as though it has one answer. It has a range, and the width of the range is the…
Why "any advice?" is the least effective ending for a post — the long version Replied, post #50 · Start Here › How to Ask · 7 Sep 2025 · 5 likes Chromatography questions need the method before anything else: column, gradient, wavelength, injection volume. A purity figure with no method attached cannot be…
Adolescents: a distinct evidence base — one year on Replied, post #12 · Clinical › Special populations · 28 Aug 2025 · 0 likes I would rather this thread reach "we do not know" about Adolescents than reach a confident answer that nobody can support when asked.
A preprint whose numbers changed substantially at publication Replied, post #13 · Evidence › Preprints · 8 Aug 2025 · 0 likes Check whether it was later published: searching for the preprint's first author and keywords in PubMed might find a published version. The published version is the…
Promotion criteria, and the one that stops most nominations — the long version Replied, post #35 · Documentation › Doc review · 3 Aug 2025 · 1 like Promotion criteria: I have looked for the primary source twice and failed twice. Either it does not exist or it is somewhere I do not know to look, and I would like to…
BPC-157: what the rodent literature actually shows, and what it does not Replied, post #24 · Compounds › Repair & healing peptides · 29 Jul 2025 · 0 likes Post #23 is the version of this I will quote in future. One addition. On BPC-157, the part that usually goes wrong is that the question is asked as though it has one…
What a documentation review can and cannot tell you Replied, post #51 · Sourcing › Independent verification · 28 Jul 2025 · 14 likes What would change my mind on documentation review is a second dataset collected by someone with no stake in the first. Until then I hold it loosely and I would rather…
Follow-up: Why we hide unevidenced fraud accusations and log the hiding Replied, post #10 · Sourcing › Red flags · 26 Jul 2025 · 6 likes The strongest single signal available cheaply is what happens when you ask a technical question. A quantitative answer inside a working day is difficult to fake at scale.
Coming back to: When "no data" is the complete and final answer Replied, post #52 · Compounds › Other compounds · 20 Jul 2025 · 13 likes On post #48 — agreed on the reasoning, with one qualification. Thymosin alpha-1 has a regulatory history in several jurisdictions and a real clinical literature, which…
Forced degradation studies: designing one that is informative — does this still hold? Replied, post #42 · Analytics › Method validation · 18 Jul 2025 · 0 likes I have three months of notes on Forced degradation studies and the honest summary is that the trend is real and the week-to-week numbers are noise. I nearly drew the…
[2026 update] What we do not know about retatrutide, listed explicitly Replied, post #14 · Compounds › Retatrutide · 17 Jul 2025 · 19 likes Nausea and vomiting were dose-related in the phase 2 work, as they are throughout this class. What is not established is whether the tolerability profile differs from…
A calculator that gives a right answer to the wrong question — does this still hold? Started this topic · Data & Tools › Calculators · 13 Jul 2025 · 0 likes A calculator that gives a right answer to the wrong question — does this still hold? I have a specific reason for asking rather than idle curiosity, and the context is…
Trial registration and comparing the protocol with the paper Replied, post #18 · Evidence › Trials · 30 Jun 2025 · 0 likes Coming back to post #14, because the follow-up matters more than the original answer. An open-label trial is not worthless and its subjective endpoints deserve more…
Anxiety in the first weeks: drug, situation, or both Replied, post #104 · Wellbeing › Mental health · 18 Jun 2025 · 30 likes On anxiety 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 get…
Foaming during reconstitution and whether it matters Replied, post #16 · Practice › Reconstitution · 16 Jun 2025 · 2 likes Post #13 is right about the mechanism and I think understates the practical bit. On foaming during reconstitution I would separate what is worth knowing from what is…
Coming back to: Official shortage notices and what they authorise Replied, post #25 · Access › Shortages · 9 Jun 2025 · 0 likes Worth separating two things that post #23 runs together. Shortages end and the notices are updated. Checking the current notice takes a minute and is more reliable than…
Half-life, steady state, and accumulation worked through Replied, post #29 · Pharmacology › Pharmacokinetics · 27 May 2025 · 2 likes Half-life is one of those subjects where the general answer and the answer for a specific case diverge, and the thread will go in circles until someone says which one…
Asking about a compound your prescriber has not heard of Replied, post #45 · Clinical › Prescriber conversations · 21 May 2025 · 13 likes Understanding stopping rules: what would prompt stopping the compound? Adverse effect, lack of benefit after a defined time, or other reasons? Knowing in advance is…
A 5 mg vial and a 0.25 mg dose: the arithmetic in full — the long version Replied, post #111 · Practice › Reconstitution · 20 May 2025 · 7 likes Post #110 is the version of this I will quote in future. One addition. The failure mode on 5 mg vial is boring rather than dramatic. It is almost always the step…
Follow-up: Why the titration planner refuses to produce a schedule below a floor Replied, post #3 · Data & Tools › Calculators · 12 May 2025 · 1 like Where I part company with the opening post, and it is a narrow parting. Unit-conversion tools are only as good as the assumption they make about the syringe. Ask what…
[2026 update] What the GIP component of tirzepatide is thought to contribute, and how… Replied, post #53 · Compounds › Tirzepatide · 12 May 2025 · 13 likes On GIP component of tirzepatide 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…
A claim built entirely on a subgroup analysis Replied, post #2 · Evidence › Study critique · 22 Apr 2025 · 5 likes The documentation on claim built is better than this thread and I say that as someone who has posted in the thread.
Adjudicated events and why the definition matters — the long version Replied, post #82 · Evidence › Trials · 5 Apr 2025 · 18 likes Adding the measurement that post #80 says would settle it. The figure that circulates in coverage is almost always whichever estimand gives the larger effect. That is…
[2026 update] US compounding rules and how they changed Replied, post #5 · marked as the solution · Regional › North America · 24 Mar 2025 · 7 likes Anyone reporting an outcome should give the stated reason rather than the verdict. The reason is the part somebody else can use. I looked this up rather than remembered…
Counter-ion form: the field almost nobody reports — one year on Replied, post #34 · Analytics › COA interpretation · 28 Feb 2025 · 8 likes What I can speak to on Counter-ion form is narrow, so I will keep it narrow rather than generalising from it. Beyond that boundary I do not know.
Telehealth prescribing models in the US Replied, post #62 · Regional › North America · 23 Feb 2025 · 20 likes Building on post #61 rather than restating it. Telehealth prescribing models has been discussed here with more heat than it deserves, mostly because two definitions…
Distinguishing a deletion sequence by mass alone Replied, post #92 · Analytics › Mass spectrometry · 15 Feb 2025 · 17 likes I read post #88 twice before replying, because I had assumed the opposite. Purity and identity are different questions: LC-MS establishes that the species at a…
Random versus fixed effects: choosing rather than defaulting — a second dataset Replied, post #103 · Evidence › Meta-analyses · 12 Feb 2025 · 0 likes Post #99 put the caveat in the right place and I want to underline it. Quality assessment of included trials should change the analysis rather than sit beside it. A…
Recovery when intake is low: what to cut first Replied, post #40 · Nutrition & Training › Resistance training · 12 Jan 2025 · 0 likes Answering the question post #38 raises rather than the one it answers. Machine-based work is often better tolerated when energy is low and is not inferior for this…
Dose numbers for oral formulations are not comparable to injectable ones — a second… Replied, post #39 · Compounds › Oral incretins · 11 Jan 2025 · 9 likes Post #36 is the version of this I will quote in future. One addition. On variability: the between-person spread in exposure for oral semaglutide is wide enough that two…
Fixed versus detachable needles: the trade-offs Replied, post #102 · Devices › Syringes & needles · 9 Jan 2025 · 14 likes Sharps disposal: needles and syringes should be disposed in a sharps container (a rigid, puncture-resistant container). Do not put them in regular trash. Many…
Books and papers worth reading that are not about this at all Replied, post #15 · Lounge › Off topic · 7 Jan 2025 · 0 likes Practical experience of books and papers, offered as one case with the conditions stated, not as a general finding. Conditions first, because they are what make it…
Tirzepatide in type 2 diabetes: the SURPASS programme, summarised honestly Started this topic · Compounds › Tirzepatide · 1 Jan 2025 · 58 likes Tirzepatide in type 2 diabetes: the SURPASS programme, summarised honestly — setting out what I have, and where I think it stops being reliable. I have spent a…
Persistent vomiting and the threshold for seeking help — one year on Replied, post #23 · Safety › Adverse events · 20 Dec 2024 · 16 likes Signs of dehydration after repeated vomiting are the most common serious secondary problem described here and are also the most preventable.
[2026 update] New subcategory: rationale and scope Replied, post #28 · Meta › Announcements · 28 Nov 2024 · 0 likes Worth saying publicly: stepping back cleanly and handing over is a service. Documents with an absent maintainer go wrong quietly, which is the worst way for them to go…
Why "any advice?" is the least effective ending for a post Replied, post #69 · Start Here › How to Ask · 24 Nov 2024 · 0 likes Answering the question post #67 raises rather than the one it answers. If you are asking about a document, quote the exact wording of the line you are asking about.…
Sample size intuition for a personal experiment Replied, post #2 · Research Methods › Statistics · 8 Nov 2024 · 2 likes Effect size with an interval is more informative than a significance verdict in essentially every case discussed here.
Research-use-only labelling: what it means and what it does not — the long version Replied, post #18 · Sourcing › Regulatory · 29 Oct 2024 · 19 likes Generic or biosimilar entry depends on patent and exclusivity positions that are jurisdiction-specific and are frequently misreported.
Irish differences from the UK position Replied, post #33 · Regional › UK & Ireland · 12 Oct 2024 · 0 likes Irish differences 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: Hoarding and why it makes a shortage worse Replied, post #3 · Access › Shortages · 8 Oct 2024 · 14 likes This settles it for me, at least until somebody posts a reason it should not.
Progressive overload when the scale is falling — one year on Replied, post #74 · Nutrition & Training › Resistance training · 20 Sep 2024 · 7 likes Where I part company with post #71, and it is a narrow parting. Two claims get bundled together under Progressive overload and they need separating. The descriptive one…
Circumference measurements as a poor man's composition estimate Replied, post #106 · Outcomes › Body composition · 28 Aug 2024 · 16 likes Confirming post #105 from a second method, which matters more than confirming it from a second person. Report the method with the number, always. A composition figure…
Second pass at: A field-by-field walk through a certificate of analysis Replied, post #36 · Analytics › COA interpretation · 25 Aug 2024 · 20 likes Where I part company with post #34, and it is a narrow parting. Taking field-by-field walk through a certificate seriously for a moment rather than deflecting: the…
Guidelines revision: what changed and why Replied, post #5 · Meta › Announcements · 24 Jul 2024 · 18 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.
Cold packs, phase-change material, and what survives ten days Replied, post #17 · Sourcing › Logistics · 15 Jun 2024 · 1 like Building on post #16 rather than restating it. Peak periods and public holidays affect this more than any other factor and are entirely predictable in advance.