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dosing-math

Page 25 of 32 · 764 questions tagged dosing-math.

764 questions · sorted by votes · page 25 of 32

11 votes 5 answers2.5k views
What is the arithmetic to convert 10 mg in 1.5 mL into units on a U-100 scale?

The case in front of me: 10 mg · 1.5 mL. Please show the division. I want to check my own against yours. I would like the general form as well as the specific number,…

dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

764 questions
insulin-syringe
insulin-syringe

U-100 and U-40 insulin syringes as measuring instruments. A U-100 syringe is graduated in insulin units where 100 units equals 1 mL, so one unit…

244 questions
reconstitution
reconstitution

Taking a lyophilised vial to a solution of known concentration: choice of diluent, volume selection, how to add liquid without shearing the cake,…

313 questions
asked by gradient_slope 46k · 44 days ago
10 votes5 answers27k views
Does splitting a 15 mg weekly dose of tirzepatide across two administrations change anything?

Conditions: 15 mg · tirzepatide. I want to know whether this is a real physical effect or an artefact of how it is measured. What prompted the question is an…

split-dosing
split-dosing

Dividing a weekly dose across more than one administration. Questions here concern the pharmacokinetic rationale, whether the peak-to-trough ratio…

44 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

764 questions
glp1-mechanism
glp1-mechanism

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

132 questions
tirzepatide
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…

370 questions
asked by loss_on_drying 40k · 19 months ago
10 votes 5 answers13k views
Why does a 0.5 mL insulin syringe read differently from the volume I thought I drew at 5 mg/mL?

Conditions: a 0.5 mL insulin syringe · 5 mg/mL. I think I have a problem. I am not yet sure whether it is a real problem or a measurement artefact. I want to know…

insulin-syringe
insulin-syringe

U-100 and U-40 insulin syringes as measuring instruments. A U-100 syringe is graduated in insulin units where 100 units equals 1 mL, so one unit…

244 questions
dead-space
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…

117 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

764 questions
asked by pascal_thibault 11k · 19 months ago
10 votes 5 answers11k views
If a cagrilintide dose is missed by five days, does the ladder reset?

Concretely: cagrilintide · five days. I can find plenty of assertions about this and almost no reasoning, which is usually a sign that nobody has checked. Assume no…

missed-dose
missed-dose

What the label instructions for a missed weekly dose are, why they differ between agents, and what the pharmacokinetics say about drift in an…

41 questions
titration
titration

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

456 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

764 questions
amylin
amylin

Amylin and its analogues, most prominently cagrilintide, as a satiety mechanism orthogonal to incretin signalling. Includes the pharmacology of…

237 questions
asked by thermal_mass 13k · 8 months ago
10 votes5 answers10k views
How many units on a 1 mL luer-lock syringe is a 2 mg dose at 20 mg/mL?

Details up front: a 1 mL luer-lock syringe · 2 mg · 20 mg/mL. I can do the algebra. I am not confident about the conversion factors. If there is a standard way to lay…

dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

764 questions
insulin-syringe
insulin-syringe

U-100 and U-40 insulin syringes as measuring instruments. A U-100 syringe is graduated in insulin units where 100 units equals 1 mL, so one unit…

244 questions
reconstitution
reconstitution

Taking a lyophilised vial to a solution of known concentration: choice of diluent, volume selection, how to add liquid without shearing the cake,…

313 questions
asked by nkem_obiora 39k · 13 months ago
10 votes 5 answers9.7k views
Why do two people with the same vial arrive at different unit counts?

I keep a written log of every draw with date, volume and syringe type. An unexpected observation, and I would like a differential rather than reassurance. The…

dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

764 questions
diluent-volume
diluent-volume

Choosing how much diluent to add, which is really a question about what you want your measurement resolution to be. Larger volumes buy you…

295 questions
insulin-syringe
insulin-syringe

U-100 and U-40 insulin syringes as measuring instruments. A U-100 syringe is graduated in insulin units where 100 units equals 1 mL, so one unit…

244 questions
asked by pierce_count 24k · 8 months ago
10 votes 5 answers9.6k views
Is 2 mg in 0.5 mL of sterile water for injection a sensible presentation for semaglutide?

Numbers first: 2 mg · 0.5 mL · sterile water for injection · semaglutide. This is a planning question. I know what my options are; I do not know how to weigh them.…

diluent-volume
diluent-volume

Choosing how much diluent to add, which is really a question about what you want your measurement resolution to be. Larger volumes buy you…

295 questions
reconstitution
reconstitution

Taking a lyophilised vial to a solution of known concentration: choice of diluent, volume selection, how to add liquid without shearing the cake,…

313 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

764 questions
sterile-water
sterile-water

Preservative-free sterile water for injection: appropriate for a single-withdrawal presentation, a poor choice for anything you intend to open…

35 questions
semaglutide
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…

470 questions
asked by pieter_maas 14k · 12 months ago
10 votes 5 answers6.8k views
Is 10 mg in 1 mL of 0.9% sodium chloride a sensible presentation for a GLP-1 receptor agonist?

Concretely: 10 mg · 1 mL · 0.9% sodium chloride · a GLP-1 receptor agonist. I want to decide this in advance so that I am not deciding it under pressure later. Assume…

diluent-volume
diluent-volume

Choosing how much diluent to add, which is really a question about what you want your measurement resolution to be. Larger volumes buy you…

295 questions
reconstitution
reconstitution

Taking a lyophilised vial to a solution of known concentration: choice of diluent, volume selection, how to add liquid without shearing the cake,…

313 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

764 questions
asked by label_claim 30k · 9 months ago
10 votes5 answers6.4k views
If I reconstitute a 50 mg vial with 2 mL of phosphate-buffered diluent, what concentration do I end up with?

For reference: 50 mg · 2 mL · phosphate-buffered diluent. I would like the arithmetic checked rather than the conclusion asserted. I have deliberately not used an…

reconstitution
reconstitution

Taking a lyophilised vial to a solution of known concentration: choice of diluent, volume selection, how to add liquid without shearing the cake,…

313 questions
diluent-volume
diluent-volume

Choosing how much diluent to add, which is really a question about what you want your measurement resolution to be. Larger volumes buy you…

295 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

764 questions
asked by birk_nordahl 16k · 7 months ago
10 votes5 answers6.2k views
What is the arithmetic to convert 5 mg in 5 mL into units on a U-100 scale?

Stated plainly: 5 mg · 5 mL. The units are where I keep going wrong, so please be explicit about them. I have sanity-checked the order of magnitude and it seems…

dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

764 questions
insulin-syringe
insulin-syringe

U-100 and U-40 insulin syringes as measuring instruments. A U-100 syringe is graduated in insulin units where 100 units equals 1 mL, so one unit…

244 questions
reconstitution
reconstitution

Taking a lyophilised vial to a solution of known concentration: choice of diluent, volume selection, how to add liquid without shearing the cake,…

313 questions
asked by teodora_ilic 17k · 11 months ago
10 votes 3 answers6.2k views
Can I reconstitute dulaglutide at 2 mg/mL and still measure a small dose accurately?

Stated plainly: dulaglutide · 2 mg/mL. I would like to set this up properly once, rather than adjust it repeatedly. My budget is real but not tight, and my tolerance…

diluent-volume
diluent-volume

Choosing how much diluent to add, which is really a question about what you want your measurement resolution to be. Larger volumes buy you…

295 questions
insulin-syringe
insulin-syringe

U-100 and U-40 insulin syringes as measuring instruments. A U-100 syringe is graduated in insulin units where 100 units equals 1 mL, so one unit…

244 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

764 questions
dulaglutide
dulaglutide

A once-weekly GLP-1 receptor agonist built on an Fc fusion rather than fatty-acid acylation. Use this tag for questions about the fusion-protein…

200 questions
asked by Dr_Ingrid_Baumgartner 73k · 7 months ago
10 votes 5 answers6.1k views
How do I convert the SELECT hazard ratio into an absolute risk reduction?

This is a question about interpretation, not about whether to act — I will take action questions elsewhere. Please show the division. I want to check my own against…

cardiovascular
cardiovascular

Cardiovascular outcomes: the SELECT major-adverse-event result, SOUL, SUSTAIN 6 and REWIND, how to convert a hazard ratio into an absolute risk…

68 questions
clinical-trials
clinical-trials

Reading the primary literature properly: estimands, intention-to-treat versus per-protocol, confidence intervals, absolute versus relative…

745 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

764 questions
asked by cal_hennessy 17k · 36 days ago
10 votes0 answers5.4k views
Can I reconstitute dulaglutide at 8 mg/mL and still measure a small dose accurately?

Stated plainly: dulaglutide · 8 mg/mL. I would like to set this up properly once, rather than adjust it repeatedly. My budget is real but not tight, and my tolerance…

diluent-volume
diluent-volume

Choosing how much diluent to add, which is really a question about what you want your measurement resolution to be. Larger volumes buy you…

295 questions
insulin-syringe
insulin-syringe

U-100 and U-40 insulin syringes as measuring instruments. A U-100 syringe is graduated in insulin units where 100 units equals 1 mL, so one unit…

244 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

764 questions
dulaglutide
dulaglutide

A once-weekly GLP-1 receptor agonist built on an Fc fusion rather than fatty-acid acylation. Use this tag for questions about the fusion-protein…

200 questions
asked by dana_wexler 11k · 7 months ago
10 votes 2 answers4.8k views
Is 60 mg in 3 mL of bacteriostatic water a sensible presentation for liraglutide?

Setup, so nobody has to ask: 60 mg · 3 mL · bacteriostatic water · liraglutide. I am trying to build something sustainable rather than something thorough that I will…

diluent-volume
diluent-volume

Choosing how much diluent to add, which is really a question about what you want your measurement resolution to be. Larger volumes buy you…

295 questions
reconstitution
reconstitution

Taking a lyophilised vial to a solution of known concentration: choice of diluent, volume selection, how to add liquid without shearing the cake,…

313 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

764 questions
bacteriostatic-water
bacteriostatic-water

Water for injection containing roughly 0.9 per cent benzyl alcohol as a bacteriostatic agent. It suppresses growth in a multiple-withdrawal vial;…

149 questions
liraglutide
liraglutide

A once-daily GLP-1 receptor agonist and the compound that established the class. Still relevant for its shorter half-life, its paediatric and…

235 questions
asked by wren_calloway 23k · 5 months ago
10 votes0 answers4.5k views
Is 10 mg in 2.5 mL of 0.9% sodium chloride a sensible presentation for mazdutide?

The case in front of me: 10 mg · 2.5 mL · 0.9% sodium chloride · mazdutide. I want to decide this in advance so that I am not deciding it under pressure later. Assume…

diluent-volume
diluent-volume

Choosing how much diluent to add, which is really a question about what you want your measurement resolution to be. Larger volumes buy you…

295 questions
reconstitution
reconstitution

Taking a lyophilised vial to a solution of known concentration: choice of diluent, volume selection, how to add liquid without shearing the cake,…

313 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

764 questions
mazdutide
mazdutide

A GLP-1 and glucagon receptor dual agonist developed primarily in China, with a distinct dose range and a fast-moving publication record.…

237 questions
asked by Dr_Ilse_Vandenberg 113k · 4 months ago
10 votes 5 answers3.6k views
Is 30 mg in 2 mL of sterile water for injection a sensible presentation for semaglutide?

What I have: 30 mg · 2 mL · sterile water for injection · semaglutide. This is a planning question. I know what my options are; I do not know how to weigh them. What…

diluent-volume
diluent-volume

Choosing how much diluent to add, which is really a question about what you want your measurement resolution to be. Larger volumes buy you…

295 questions
reconstitution
reconstitution

Taking a lyophilised vial to a solution of known concentration: choice of diluent, volume selection, how to add liquid without shearing the cake,…

313 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

764 questions
sterile-water
sterile-water

Preservative-free sterile water for injection: appropriate for a single-withdrawal presentation, a poor choice for anything you intend to open…

35 questions
semaglutide
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…

470 questions
asked by rania_haddad 13k · 4 months ago
10 votes 1 answer2.5k views
How many vial-days does a 2 mg vial give at 3.33 mg/mL on a weekly schedule?

Details up front: 2 mg · 3.33 mg/mL. This should be a straightforward calculation and I keep getting two different answers. The numbers are arbitrary; the method is…

dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

764 questions
cost-analysis
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,…

260 questions
diluent-volume
diluent-volume

Choosing how much diluent to add, which is really a question about what you want your measurement resolution to be. Larger volumes buy you…

295 questions
asked by bac_or_bust 33k · 7 months ago
9 votes5 answers29k views
Can I reconstitute oral semaglutide at 1 mg/mL and still measure a small dose accurately?

The particulars: oral semaglutide · 1 mg/mL. I am at the decision point and I would rather think it through than improvise. I would rather spend money on measurement…

diluent-volume
diluent-volume

Choosing how much diluent to add, which is really a question about what you want your measurement resolution to be. Larger volumes buy you…

295 questions
insulin-syringe
insulin-syringe

U-100 and U-40 insulin syringes as measuring instruments. A U-100 syringe is graduated in insulin units where 100 units equals 1 mL, so one unit…

244 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

764 questions
oral-glp1
oral-glp1

Oral routes for GLP-1 receptor agonism: peptide formulations rescued by absorption enhancers such as SNAC, and true small molecules that need no…

219 questions
asked by tri_gly_ala 24k · 2.0 years ago
9 votes5 answers27k views
Can I reconstitute cagrilintide at 2.5 mg/mL and still measure a small dose accurately?

Details up front: cagrilintide · 2.5 mg/mL. I would rather over-plan the first cycle and simplify later. I am prepared to do the work if someone can tell me which…

diluent-volume
diluent-volume

Choosing how much diluent to add, which is really a question about what you want your measurement resolution to be. Larger volumes buy you…

295 questions
insulin-syringe
insulin-syringe

U-100 and U-40 insulin syringes as measuring instruments. A U-100 syringe is graduated in insulin units where 100 units equals 1 mL, so one unit…

244 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

764 questions
amylin
amylin

Amylin and its analogues, most prominently cagrilintide, as a satiety mechanism orthogonal to incretin signalling. Includes the pharmacology of…

237 questions
asked by jana_horakova 10k · 23 months ago
9 votes 5 answers25k views
What does STEP 3 report at the 2.4 mg dose level?

For reference: STEP 3 · 2.4 mg. I want to understand what this actually establishes, as opposed to what it is being used to imply. My concern is that I am being…

clinical-trials
clinical-trials

Reading the primary literature properly: estimands, intention-to-treat versus per-protocol, confidence intervals, absolute versus relative…

745 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

764 questions
titration
titration

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

456 questions
asked by linnea_wahlberg 17k · 21 months ago
9 votes 5 answers23k views
Is there a pharmacokinetic case for moving tirzepatide injection day by ten days?

The case in front of me: tirzepatide · ten days. I understand the observation; what I do not understand is the mechanism behind it. I have read the two review…

missed-dose
missed-dose

What the label instructions for a missed weekly dose are, why they differ between agents, and what the pharmacokinetics say about drift in an…

41 questions
glp1-mechanism
glp1-mechanism

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

132 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

764 questions
tirzepatide
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…

370 questions
asked by assay_blank 45k · 2.1 years ago
9 votes5 answers20k views
If I reconstitute a 15 mg vial with 1 mL of phosphate-buffered diluent, what concentration do I end up with?

The particulars: 15 mg · 1 mL · phosphate-buffered diluent. I would like the arithmetic checked rather than the conclusion asserted. I have deliberately not used an…

reconstitution
reconstitution

Taking a lyophilised vial to a solution of known concentration: choice of diluent, volume selection, how to add liquid without shearing the cake,…

313 questions
diluent-volume
diluent-volume

Choosing how much diluent to add, which is really a question about what you want your measurement resolution to be. Larger volumes buy you…

295 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

764 questions
asked by nynke_dekker 9.4k · 2.2 years ago
9 votes5 answers16k views
How do I convert the FLOW hazard ratio into an absolute risk reduction?

I have three data points across nine months, which I hope is enough to see a trend. I would like the arithmetic checked rather than the conclusion asserted. I have…

cardiovascular
cardiovascular

Cardiovascular outcomes: the SELECT major-adverse-event result, SOUL, SUSTAIN 6 and REWIND, how to convert a hazard ratio into an absolute risk…

68 questions
clinical-trials
clinical-trials

Reading the primary literature properly: estimands, intention-to-treat versus per-protocol, confidence intervals, absolute versus relative…

745 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

764 questions
asked by ten_mg_vial 31k · 18 months ago
9 votes 5 answers15k views
Is 50 mg in 5 mL of phosphate-buffered diluent a sensible presentation for dulaglutide?

The particulars: 50 mg · 5 mL · phosphate-buffered diluent · dulaglutide. I would like to define my thresholds before I have a result, for obvious reasons. I want a…

diluent-volume
diluent-volume

Choosing how much diluent to add, which is really a question about what you want your measurement resolution to be. Larger volumes buy you…

295 questions
reconstitution
reconstitution

Taking a lyophilised vial to a solution of known concentration: choice of diluent, volume selection, how to add liquid without shearing the cake,…

313 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

764 questions
dulaglutide
dulaglutide

A once-weekly GLP-1 receptor agonist built on an Fc fusion rather than fatty-acid acylation. Use this tag for questions about the fusion-protein…

200 questions
asked by Dr_Aoife_Brennan 20k · 2.1 years ago