f.kimani

TL2 Moderator · Utrecht

Contributes reviews on supplier material. Based in Utrecht.

Joined 18 December 2024 · last posted 1h

87 posts, newest first. Showing up to 150.

Revisiting: The best-written scientific paper you have read Replied, post #122 · Lounge › Off topic · 28 Jul 2026 · 19 likes I disagree with the reply above, and I think the disagreement is substantive rather than terminological. The distinction being drawn does not survive when you look at…
Coming back to: Payment method and the leverage it gives you, ranked Replied, post #27 · Sourcing › Payments · 26 Jul 2026 · 25 likes Recurring billing: if a supplier sets up recurring billing by default, understanding the terms for cancellation is important before the first charge.
How shortages have affected compounding permissions — does this still hold? Replied, post #31 · Access › Shortages · 25 Jul 2026 · 0 likes Supply interruptions: official shortage notices are published by regulatory agencies. That is the correct primary source rather than pharmacy rumors or forum discussion.
Reading order for a first week here, and what to skip until later — what changed since Replied, post #49 · Start Here › Welcome · 16 Jul 2026 · 0 likes There is no stupid-questions rule and no penalty for asking badly. The response to a poorly framed question is a request for clarification, not rudeness. That is a…
About the Receptor biology category Replied, post #11 · Pharmacology › Receptor biology · 7 Jul 2026 · 29 likes Glucagon receptor agonism: glucagon receptor agonism increases energy expenditure and promotes hepatic fat oxidation. The mechanism is distinct from GLP-1 and GIP…
An 18-month record including the parts that went badly Replied, post #55 · Outcomes › Progress reports · 30 Jun 2026 · 0 likes Rate of change: reporting progress as "lost 5 kg in 12 weeks" is more useful than "currently at 82 kg" because the rate tells you whether the change is steady,…
Peak-to-trough ratio at steady state for a weekly agent — the long version Replied, post #36 · Pharmacology › Pharmacokinetics · 28 Jun 2026 · 16 likes Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did and when. The single most useful thing in your own…
Second pass at: When your prescriber and the evidence disagree Replied, post #41 · Clinical › Prescriber conversations · 26 Jun 2026 · 13 likes On post #37 — agreed on the reasoning, with one qualification. How to ask for what you need: rather than "should I take this", frame it as "I understand the evidence…
Muscle cramps: the ordinary causes before the exotic ones — a second dataset Replied, post #15 · Practice › Side effects · 26 Jun 2026 · 7 likes Recognition and grading: nausea ranges from "noticeable" to "limiting". Constipation ranges from mild to severe. Having language to describe the magnitude helps you…
Why we ask for units every single time, with three examples of what goes wrong Replied, post #72 · Start Here › How to Ask · 26 Jun 2026 · 0 likes Disagreement-style questions: "I read this and it contradicts what I heard here, which is right?" is answerable. "Is this a bad idea?" without giving the context is not.
[2026 update] Travelling with an injectable: documentation and practicalities Replied, post #32 · Access › International · 23 Jun 2026 · 9 likes Having read the exchange above, I think I was wrong earlier in this topic and I want to say so plainly rather than quietly editing. The correction was fair and I had…
Muscle cramps: the ordinary causes before the exotic ones — a second dataset Replied, post #9 · Practice › Side effects · 22 Jun 2026 · 18 likes Constipation: common, manageable, and frequently under-reported because it is not dramatic. Increasing fibre and fluid intake helps. Over-the-counter management is…
Osteoarthritis and mechanical versus metabolic improvement Replied, post #3 · Clinical › Comorbidities · 14 Jun 2026 · 21 likes Cardiovascular disease: several compounds have cardiovascular outcome trials. SELECT was in people without diabetes; SUSTAIN 6 was in high-risk diabetes. Absolute…
A certificate whose chromatogram axes do not match its stated method — one year on Replied, post #80 · Sourcing › Red flags · 6 Jun 2026 · 22 likes Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did and when. The single most useful thing in your own…
Second pass at: Absence of evidence and evidence of absence Replied, post #12 · Research Methods › Statistics · 30 May 2026 · 2 likes post #11 is right about the mechanism and I think understates the practical bit. Number needed to treat: how many people need to be treated to prevent one bad outcome…
Reused chromatograms across lots: how to spot it Replied, post #44 · Analytics › COA interpretation · 25 May 2026 · 0 likes Endotoxin testing is separate: a certificate of purity says nothing about endotoxin. A chemically pure preparation can carry a clinically significant endotoxin load. If…
Blind submission and why it changes minds — the long version Replied, post #88 · Sourcing › Independent verification · 21 May 2026 · 27 likes Having read the exchange above, I think I was wrong earlier in this topic and I want to say so plainly rather than quietly editing. The correction was fair and I had…
Five questions in one post gets you one answer — how to split them Replied, post #73 · Start Here › How to Ask · 6 May 2026 · 12 likes On post #69 — agreed on the reasoning, with one qualification. What you have already read matters. Saying "I read the maintained page on this and I still have a gap"…
Journal club: is percentage weight change the right endpoint? Replied, post #114 · Evidence › Journal club · 28 Apr 2026 · 2 likes Session format: read the paper before posting. The discussion is much better when everyone has. Start with the estimand and population, then methods, then results, then…
[2026 update] Charge states for a 4 kDa peptide, worked through Replied, post #94 · Analytics › Mass spectrometry · 19 Apr 2026 · 0 likes Picking up post #91: that is the part I would want checked first. Tandem mass spectrometry: MS/MS fragments the molecular ion and uses fragment masses to confirm…
Journal club: orforglipron phase 2 and the non-peptide question Replied, post #40 · Evidence › Journal club · 16 Apr 2026 · 0 likes Session format: read the paper before posting. The discussion is much better when everyone has. Start with the estimand and population, then methods, then results, then…
Follow-up: Reconciling a label claim with a content assay Replied, post #9 · Analytics › COA interpretation · 8 Mar 2026 · 19 likes Sterility testing is separate: chromatographic purity, mass spectrometry, and endotoxin testing all say nothing about whether a solution is sterile. If sterility…
Amylin receptor signalling and satiety — what changed since Replied, post #38 · Pharmacology › Receptor biology · 2 Mar 2026 · 9 likes Amylin receptor signalling: amylin promotes satiety and slows gastric emptying through a receptor distinct from GLP-1. The hypothesis behind combination therapy is two…
Pregnancy and pregnancy planning: contraindication and washout Replied, post #54 · Clinical › Special populations · 25 Feb 2026 · 4 likes For anyone arriving from a search: the marked solution above is the direct answer, and the replies underneath it add the caveats that make it safe to use.
Trust level 3 requirements: a clarification — does this still hold? Replied, post #9 · Meta › Announcements · 25 Feb 2026 · 0 likes This follows post #6 rather than contradicting it. Implementation timeline: announcements include when a change takes effect. Marking the date helps you know whether…
Measurement error in a self-reported exposure Replied, post #21 · Evidence › Study critique · 22 Feb 2026 · 9 likes This follows post #18 rather than contradicting it. When you change your mind: if a reply convinces you that your criticism was not well-founded, say so plainly. The…
Second pass at: Which categories are strict and which are relaxed, honestly Replied, post #15 · Start Here › Welcome · 19 Feb 2026 · 5 likes Introducing yourself is fine and requires no question. Post in this subcategory, describe the context that matters for why you are here, and lurk for a bit before…
Why "dose equivalence" between different incretin analogues is a weak concept Replied, post #62 · Practice › Dosing & titration · 18 Feb 2026 · 19 likes Titrating on tolerability rather than on the calendar: some people escalate when they tolerate a dose well, others escalate on the prescribed schedule regardless. The…
Non-inferiority margins: how they are chosen and how they are abused — a second dataset Replied, post #31 · Evidence › Trials · 16 Feb 2026 · 2 likes Surrogate endpoints: an endpoint that is not the outcome that matters but is measured as a stand-in. HbA1c is a surrogate for long-term glucose control and the…
Why one laboratory's 98.4% and another's 96.1% may not contradict — one year on Replied, post #2 · Analytics › Method validation · 14 Feb 2026 · 0 likes Transfer between laboratories: a method can be transferred from one lab to another, but the receiving lab needs to demonstrate that they can achieve the same…
Second pass at: Metformin co-administration and additive GI effects Replied, post #47 · Practice › Interactions · 9 Feb 2026 · 14 likes Thyroid medications: semaglutide is associated with a slowing of gastric emptying, which might affect thyroid medication absorption if they are taken very close…
Older adults, sarcopenia risk, and the trade-off nobody quantifies Replied, post #88 · Clinical › Special populations · 30 Jan 2026 · 0 likes Picking up post #85: that is the part I would want checked first. Thank you for the correction. I have edited my earlier post with a note rather than silently, so the…
Second pass at: Pregnancy and pregnancy planning: contraindication and washout Replied, post #84 · Clinical › Special populations · 25 Jan 2026 · 3 likes For anyone arriving from a search: the marked solution above is the direct answer, and the replies underneath it add the caveats that make it safe to use.
Second pass at: Pregnancy and pregnancy planning: contraindication and washout Replied, post #67 · Clinical › Special populations · 24 Jan 2026 · 0 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 exists.
A plateau that disappeared when I changed how I measured — the long version Replied, post #2 · Outcomes › Progress reports · 19 Jan 2026 · 14 likes Thank you for the correction. I have edited my earlier post with a note rather than silently, so the thread still makes sense to read. The error was mine and it was the…
A pen that felt like it delivered nothing: diagnosing it afterwards Replied, post #38 · Devices › Pens & autoinjectors · 16 Jan 2026 · 3 likes post #37 is right about the mechanism and I think understates the practical bit. Reusability: some pens are single-use (throw away after one injection). Others can be…
Run-in periods and the population they select Replied, post #38 · Evidence › Trials · 20 Dec 2025 · 0 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…
When to stop reading forums, including this one Replied, post #60 · Wellbeing › Mental health · 10 Dec 2025 · 0 likes Worth separating two things that post #56 runs together. Social and relationship impacts: weight change affects how others perceive and interact with a person. Those…
Coverage in the US: a map of the usual obstacles Replied, post #19 · Regional › North America · 6 Dec 2025 · 20 likes Regional variation in North America: access differs substantially by US state and Canadian province. Postcode is a major determinant of access.
Coming back to: Injection-site reactions: describing them precisely enough to be useful Replied, post #26 · Practice › Side effects · 26 Nov 2025 · 29 likes Pancreatitis: a rare but serious event with a specific presentation (epigastric pain, back pain, elevated lipase). If this constellation of findings appears, stopping…
Sequence verification for an obscure compound: how it is done — what changed since Replied, post #62 · Compounds › Other compounds · 24 Nov 2025 · 9 likes Melanocortin agonists: mechanism involves the melanocortin-4 receptor pathway that regulates appetite. The documented adverse profile includes blood pressure elevation…
Lurking for two months before posting: was that the right call? Replied, post #66 · Start Here › Welcome · 20 Nov 2025 · 9 likes Worth separating two things that post #62 runs together. Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did…
Pen dose counters: what a click does and does not guarantee Replied, post #114 · Devices › Pens & autoinjectors · 20 Nov 2025 · 0 likes Coming back to post #112, because the follow-up matters more than the original answer. Priming: most pens require priming before the first use (injecting a small amount…
Availability by country, dated, with primary sources Replied, post #49 · Access › International · 6 Nov 2025 · 2 likes Language barriers: if you need to communicate with a supplier, clinician, or regulator in a language not your first language, misunderstanding is possible. Clarify when…
Second pass at: Programming during a large energy deficit Replied, post #60 · Nutrition & Training › Resistance training · 30 Oct 2025 · 9 likes post #59 is right about the mechanism and I think understates the practical bit. For anyone arriving from a search: the marked solution above is the direct answer, and…
Pharmaceutical compounding rules, summarised from primary sources — a second dataset Replied, post #8 · Sourcing › Regulatory · 30 Oct 2025 · 0 likes I read post #6 twice before replying, because I had assumed the opposite. Import restrictions vary by compound and by jurisdiction: what is a controlled substance in…
Sleep tracking data and its considerable limitations Replied, post #104 · Wellbeing › Sleep · 27 Oct 2025 · 14 likes Worth separating two things that post #100 runs together. Having read the exchange above, I think I was wrong earlier in this topic and I want to say so plainly rather…
Trust level 3 requirements: a clarification Replied, post #12 · Meta › Announcements · 15 Oct 2025 · 1 like Notifications: watching this subcategory means you receive notifications when announcements are posted. Useful if you want to stay current.
Compounds this community declines to help with, and why Replied, post #88 · Compounds › Other compounds · 9 Oct 2025 · 0 likes This follows post #85 rather than contradicting it. For anyone arriving from a search: the marked solution above is the direct answer, and the replies underneath it add…
Substitution between formats during a shortage Replied, post #51 · Access › Shortages · 5 Sep 2025 · 29 likes On post #47 — agreed on the reasoning, with one qualification. Supply interruptions: official shortage notices are published by regulatory agencies. That is the correct…
Pooling trials with different estimands — what changed since Replied, post #17 · Evidence › Meta-analyses · 26 Aug 2025 · 2 likes I disagree with the reply above, and I think the disagreement is substantive rather than terminological. The distinction being drawn does not survive when you look at…
Can a home kit substitute for a laboratory report? A careful no Replied, post #2 · Analytics › Home & field testing · 25 Aug 2025 · 8 likes What physical quantity does the device measure? A colorimetric or lateral-flow method typically responds to a class of chemistry rather than to a specific molecule. It…
Journal club: STEP-HFpEF and symptom endpoints — a second dataset Replied, post #3 · Evidence › Journal club · 22 Aug 2025 · 29 likes SURMOUNT-1 (N Engl J Med 2022): Tirzepatide obesity trial. The largest mean weight reduction for a pharmacological intervention at publication. Read the categorical…
Coming back to: Over-dilution: when your dose falls below one readable graduation Replied, post #44 · Practice › Reconstitution · 16 Aug 2025 · 18 likes post #43 is right about the mechanism and I think understates the practical bit. Osmolarity and reconstitution: the osmolarity of the reconstituted solution affects…
Why catalogue breadth is not evidence of anything — what changed since Replied, post #20 · Compounds › Other compounds · 16 Aug 2025 · 4 likes Thank you for the correction. I have edited my earlier post with a note rather than silently, so the thread still makes sense to read. The error was mine and it was the…
Persistent vomiting and the threshold for seeking help Replied, post #18 · Safety › Adverse events · 13 Aug 2025 · 1 like Picking up post #15: that is the part I would want checked first. Pancreatitis is a genuine serious adverse event to know: severe epigastric pain, back pain, elevated…
Coming back to: What published stability data actually covers, and what it does not Replied, post #108 · Practice › Storage & stability · 9 Aug 2025 · 5 likes Temperature excursions: if a vial sat at room temperature for a time, the question is whether the excursion was long enough to cause damage. Hours at room temperature…
Comparing my trajectory with the trial curves, carefully Replied, post #30 · Outcomes › Progress reports · 30 Jul 2025 · 9 likes Coming back to post #28, because the follow-up matters more than the original answer. Exercise volume changes: increasing exercise intensity or duration can mask weight…
High-resolution MS on aggregates and what it can see Replied, post #28 · Analytics › Mass spectrometry · 23 Jul 2025 · 2 likes Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did and when. The single most useful thing in your own…
Holding a dose indefinitely: is there a documented downside? Replied, post #30 · Practice › Dosing & titration · 14 Jul 2025 · 23 likes I read post #28 twice before replying, because I had assumed the opposite. Having read the exchange above, I think I was wrong earlier in this topic and I want to say…
About the Side effects category Replied, post #3 · Practice › Side effects · 5 Jul 2025 · 0 likes As a member rather than staff: the most useful thing I did when I started reading this category was to work through the tag pages rather than the topic list. The topic…
Reconstituting a multi-strength kit without mixing yourself up Replied, post #69 · Practice › Reconstitution · 10 May 2025 · 25 likes Over-dilution: if your target dose is 0.25 mg and your syringe is a 1 mL insulin syringe, you need a concentration high enough that 0.25 mg fits on the scale. A 0.25…
When "no data" is the complete and final answer Replied, post #139 · Compounds › Other compounds · 5 Apr 2025 · 0 likes Compounds this community declines to help with, and why: there are specifics in the guidelines and they are not arbitrary. They exist because of failure modes that have…
Why cagrilintide alone is discussed so much less than in combination Replied, post #106 · Compounds › Cagrilintide & amylin analogues · 4 Apr 2025 · 1 like On post #102 — agreed on the reasoning, with one qualification. Nausea profile of amylin analogues: the historical agent pramlintide required multiple daily doses and…
Second pass at: A history of disordered eating: proceeding carefully Replied, post #26 · Wellbeing › Mental health · 31 Mar 2025 · 4 likes Worth separating two things that post #22 runs together. Mood and anxiety: mood changes and anxiety are reported by some people. Baseline mental health status matters…
Amylin analogue mechanism: satiety signalling separate from GLP-1 Replied, post #85 · Compounds › Cagrilintide & amylin analogues · 22 Mar 2025 · 33 likes The dosing interval: cagrilintide's half-life is roughly 7 to 8 days, suitable for weekly dosing. The pharmacokinetics are the reason the dosing schedule makes sense.
Domestic fridge temperature mapping: a cheap experiment — what changed since Replied, post #68 · Devices › Cold chain · 16 Mar 2025 · 0 likes Temperature logging: devices that record temperature over time let you confirm cold chain was maintained. Useful if a shipment was delayed or if you are concerned about…
What a seizure notice actually says Replied, post #39 · Sourcing › Logistics · 5 Mar 2025 · 5 likes Picking up post #36: that is the part I would want checked first. At what point is a parcel genuinely a problem: if it was despatched weeks ago and there has been no…
Preservatives: function, testing, and limits Replied, post #15 · Pharmacology › Formulation chemistry · 28 Feb 2025 · 0 likes Emulsification and suspensions: some formulations are emulsions or suspensions rather than solutions. Semaglutide formulations are solutions; some other compounds are…
Journal club: STEP 4 and what a withdrawal design can prove — one year on Replied, post #33 · Evidence › Journal club · 9 Feb 2025 · 0 likes PIONEER 6 (N Engl J Med 2019): Cardiovascular safety trial for oral semaglutide, not efficacy. Non-inferiority for safety was met. The trial was not designed to…
SNAC and the mechanism of oral peptide absorption — the long version Replied, post #28 · Compounds › Oral incretins · 7 Feb 2025 · 21 likes Trial adherence in an oral trial with strict administration requirements is genuinely worse than trial-published data often suggests. That is why the exposure…
Journal club: SURMOUNT-1, read without the press release Replied, post #39 · Evidence › Journal club · 6 Jan 2025 · 0 likes Picking up post #36: that is the part I would want checked first. SURPASS-2 (N Engl J Med 2021): Direct comparison of tirzepatide with semaglutide 1.0 mg. The 1.0 mg…
Oxidation pathways for methionine and tryptophan Replied, post #54 · Analytics › Impurities & related substances · 30 Dec 2024 · 24 likes Related substances: compounds chemically related to the target peptide but not the target peptide itself. The standard method separates them and reports them as area…
Scheduled maintenance and what will be unavailable Replied, post #4 · Meta › Announcements · 29 Dec 2024 · 20 likes Picking up the opening post: that is the part I would want checked first. Implementation timeline: announcements include when a change takes effect. Marking the date…
Oral semaglutide bioavailability and its variability between people — a second dataset Replied, post #91 · Compounds › Oral incretins · 28 Dec 2024 · 23 likes Why an oral formulation is a formulation achievement: the molecule is the same but the tablet is novel. Getting a peptide across the gastric epithelium at usable…
[2026 update] How to read a forest plot, properly, from scratch Replied, post #4 · Evidence › Trials · 26 Nov 2024 · 19 likes Coming back to post #2, because the follow-up matters more than the original answer. Confounding in observational data: a third variable can explain an apparent…
Turnaround times and what they mean for a decision — one year on Replied, post #16 · Sourcing › Independent verification · 23 Nov 2024 · 0 likes post #15 answers the question as asked. The question underneath it is different. Repeat testing: if you want to verify the same lot a second time, testing with a…
Renal impairment: what the labelling says about dose Replied, post #4 · Clinical › Special populations · 21 Nov 2024 · 0 likes Older adults: sarcopenia risk is higher, polypharmacy is common, and the clinical trials did not enroll many people over 75. Extrapolating to very old people is…
Coming back to: Preparing for an appointment: one page, three questions Replied, post #98 · Clinical › Prescriber conversations · 12 Nov 2024 · 6 likes post #97 is right about the mechanism and I think understates the practical bit. What to bring: copies of relevant lab results, pharmacy records (to confirm doses…
Follow-up: Recovery when intake is low: what to cut first Replied, post #14 · Nutrition & Training › Resistance training · 9 Nov 2024 · 21 likes post #13 is right about the mechanism and I think understates the practical bit. Volume: the number of sets per muscle group per week that supports muscle maintenance…
Second pass at: Hoarding and why it makes a shortage worse Replied, post #116 · Access › Shortages · 13 Oct 2024 · 1 like Picking up post #113: that is the part I would want checked first. Compounding during shortages: some jurisdictions allow pharmacy compounding when a marketed product…
Hypertension improvement and when medication needs revisiting — a second dataset Replied, post #25 · Clinical › Comorbidities · 12 Oct 2024 · 13 likes Cardiovascular disease: several compounds have cardiovascular outcome trials. SELECT was in people without diabetes; SUSTAIN 6 was in high-risk diabetes. Absolute…
Requesting a page: what makes a good request — what changed since Replied, post #33 · Documentation › Wiki requests · 10 Oct 2024 · 0 likes Two things before anyone answers the substance. First, the context in the first post is clear and specific. Second, the question is framed so that an answer can…
Circumference measurements as a poor man's composition estimate Replied, post #27 · Outcomes › Body composition · 29 Jul 2024 · 0 likes Visceral fat: DXA does not distinguish visceral (organ-associated) fat from subcutaneous fat. That distinction might matter but requires different imaging to measure.
Guidelines revision: what changed and why Replied, post #57 · Meta › Announcements · 26 Jul 2024 · 4 likes Scheduled maintenance: if the site is going offline for maintenance, advance notice will be posted here with the duration and scope.
Splitting a weekly dose in two: the pharmacokinetic argument against — the long version Replied, post #89 · Practice › Dosing & titration · 9 Jul 2024 · 10 likes How the published trials escalated: they used specific step sizes and intervals. The STEP programme used a particular cadence; the SURPASS and SURMOUNT programmes used…
How this community labels and discusses unrefereed work Replied, post #43 · Evidence › Preprints · 26 Jun 2024 · 1 like Discussing preprints in this community: bring them in for early discussion, label them clearly as preprints, invite peer critique, and be prepared for the discussion to…