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m_haraldsen

Member for 1.4 yearsMember since 24 Mar 2025Last seen 26 days agoFrom Wellington, NZ

I only post when I have a certificate to attach.

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15 questions · highest score 38

38Is a 30G needle the right choice for drawing liraglutide at 1 mg/mL?5 answers, accepted · 41k views · needle-gauge, injection-technique, dead-space 34How many units on a low-dead-space syringe is a 50 mg dose at 1 mg/mL?5 answers, accepted · 38k views · dosing-math, insulin-syringe, reconstitution 30How much of the first four weeks of loss is fluid?5 answers, accepted · 49k views · plateau, hydration, weight-regain 29Why did my lipase move after two weeks on survodutide?5 answers, accepted · 27k views · bloodwork, kidney-function, lipids 28How many vial-days does a 10 mg vial give at 8 mg/mL on a weekly schedule?5 answers, accepted · 38k views · dosing-math, cost-analysis, diluent-volume 28How many vial-days does a 30 mg vial give at 2.5 mg/mL on a weekly schedule?5 answers, accepted · 32k views · dosing-math, cost-analysis, diluent-volume 26Why do two papers on SOUL report different headline figures?5 answers, accepted · 25k views · clinical-trials, dosing-math, semaglutide 23Does the SURPASS-2 population resemble anyone asking about cagrilintide here?5 answers, accepted · 25k views · clinical-trials, harm-reduction, semaglutide 23How do I write up a PeptideMeter result on oral semaglutide so it is useful to others?5 answers, accepted · 32k views · batch-testing, coa, harm-reduction 19How do I write up a Medutest result on dulaglutide so it is useful to others?5 answers, accepted · 9.4k views · batch-testing, coa, harm-reduction 15How do I compare QSC and SGN on lead time to Finland?5 answers · 10k views · vendor-comparison, international-shipping, cold-chain 11Does holding at 4 mg for three weeks before escalating reduce vomiting?5 answers, accepted · 14k views · titration, nausea, dose-escalation 11Would you re-test dulaglutide after eight weeks at 37 °C, or accept the original certificate?5 answers · 12k views · batch-testing, peptide-stability, coa 6Is SURMOUNT-2 a fair comparison of ecnoglutide against its comparator arm?5 answers · 15k views · clinical-trials, semaglutide, tirzepatide 3What does STEP 3 actually establish about dulaglutide?0 answers · 2.3k views · clinical-trials, semaglutide, cardiovascular

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batch-testing29 posts clinical-trials28 posts coa23 posts harm-reduction21 posts dosing-math21 posts purity20 posts peptide-stability19 posts storage15 posts

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Hot on the stack

How much of the first four weeks of loss is fluid?30 votes · 5 answers · 49k views What does 96.8% purity on a C4 column actually tell me about a dulaglutide vial?31 votes · 5 answers · 51k views Is ATTAIN-1 a fair comparison of tirzepatide against its comparator arm?38 votes · 5 answers · 52k views What fraction of loss on retatrutide is lean mass according to PIONEER-1?38 votes · 5 answers · 52k views My a GLP-1 receptor agonist vial sat at 40 °C for seven days — is testing worth it before use?35 votes · 2 answers · 54k views My oral semaglutide vial sat at 40 °C for three days — is testing worth it before use?24 votes · 5 answers · 56k views Why does hydrolysis accelerate at minus 20 °C rather than proceeding linearly?35 votes · 5 answers · 58k views

Tags

cost-analysis261

cost-analysis

Cost arithmetic done honestly: cost per milligram after dead-space loss, list versus net price, comparing a multi-dose vial to a fixed-dose pen,…

261 questionsdexa84

dexa

Dual-energy X-ray absorptiometry: what it measures, its precision limits, why hydration state and scan positioning move the numbers, and how to…

84 questionsdose-escalation88

dose-escalation

The decision to move up a step: what evidence supports a four-week interval, what happens when you compress it, and how trial protocols handled…

88 questionspurity788

purity

Purity as chromatographic area per cent - the fraction of detected material that is your target peak. It says nothing about how much material is…

788 questionsmuscle-loss82

muscle-loss

Loss of contractile tissue during energy deficit: what fraction of total loss is lean mass, why the commonly quoted figures are measurement…

82 questionstitration444

titration

Stepwise dose increases over weeks, why the label schedules exist at all, and what tolerability-driven deviation from a schedule looks like in…

444 questionscold-chain524

cold-chain

Keeping material within a temperature window from manufacture to use: phase-change packs versus dry ice, thermal mass, transit-lane temperature…

524 questionsglp1-mechanism175

glp1-mechanism

Receptor-level pharmacology: GLP-1R as a class B GPCR, cAMP and PKA signalling, biased agonism, internalisation and resensitisation, and the…

175 questionsdead-space110

dead-space

The volume trapped in the syringe hub and needle after the plunger bottoms out. It is small in absolute terms and large as a fraction of a small…

110 questionsliver-enzymes50

liver-enzymes

ALT, AST, GGT and ALP: what they do and do not indicate about hepatic fat, why enzymes are a poor surrogate for histology, and where non-invasive…

50 questionscustoms186

customs

Customs handling: how declarations are assessed, why a parcel sits at a facility for a week, seizure notices, and the practical difference between…

186 questionscoa749

coa

Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot…

749 questionsacetate-content87

acetate-content

Counter-ion content, most often acetate or trifluoroacetate, and why it matters: the counter-ion and residual water are part of the gross mass you…

87 questionsbloodwork284

bloodwork

Laboratory monitoring: which panels are worth ordering, sensible intervals, reference-range versus optimal-range arguments, and how to read a…

284 questionsvial-inspection66

vial-inspection

What you can learn by looking: cake morphology, meniscus films, fibres versus stopper fragments versus true particulates, clarity after…

66 questionslean-mass164

lean-mass

Lean body mass as measured rather than assumed: what DEXA, BIA and air-displacement plethysmography each actually estimate, the body-composition…

164 questionshplc466

hplc

Reverse-phase high-performance liquid chromatography, the workhorse purity method. Column chemistry, mobile-phase choice, gradient slope,…

466 questionsgip-receptor83

gip-receptor

GIP receptor pharmacology, and the still-unsettled question of whether agonism or antagonism at GIPR is the metabolically useful direction.…

83 questionsgi-side-effects416

gi-side-effects

The gastrointestinal cluster as a whole - nausea, vomiting, diarrhoea, constipation, reflux, early satiety - with trial incidence rates, dropout…

416 questionsprotein-intake53

protein-intake

Protein targets in grams per kilogram, per-meal distribution and the leucine threshold, and the evidence for a higher intake specifically during…

53 questionscompounding61

compounding

Compounded preparations: what a 503A and a 503B facility may legally prepare and when, base versus salt forms, beyond-use dating under USP…

61 questionsvendor-vetting436

vendor-vetting

Evaluating a supplier on evidence rather than reputation: testing history across batches, whether certificates are batch-specific, how failures…

436 questionsharm-reduction445

harm-reduction

Reducing avoidable risk where a decision has already been made: independent verification before use, sterility practice, dose arithmetic checked…

445 questionstirzepatide162

tirzepatide

A dual GIP and GLP-1 receptor agonist. Questions here cover the SURPASS and SURMOUNT programmes, the practical differences from a pure GLP-1…

162 questionssemaglutide360

semaglutide

A GLP-1 receptor agonist with a fatty-acid-acylated backbone and a roughly one-week half-life, marketed for type 2 diabetes and for weight…

360 questionsa1c108

a1c

Glycated haemoglobin as a ninety-day glycaemic average: what a change of half a point means, why it lags, and the conditions under which it…

108 questions

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