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dosing-math

Page 11 of 32 · 764 questions tagged dosing-math.

764 questions · sorted by votes · page 11 of 32

24 votes 5 answers27k views
Is 4 mg in 1.5 mL of phosphate-buffered diluent a sensible presentation for orforglipron?

For reference: 4 mg · 1.5 mL · phosphate-buffered diluent · orforglipron. 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
orforglipron
orforglipron

A non-peptide, orally bioavailable small-molecule GLP-1 receptor agonist studied in the ATTAIN programme. It is not a peptide, which changes…

219 questions
asked by aine_mulcahy 28k · 2.3 years ago
24 votes5 answers23k views
How many units on a 1 mL luer-lock syringe is a 10 mg dose at 10 mg/mL?

What I have: a 1 mL luer-lock syringe · 10 mg · 10 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 jana_horakova 10k · 2.0 years ago
24 votes 3 answers23k views
Why does my 10 mg vial only yield about 9.2 mg of usable draws even with low-dead-space syringes?

I switched to fixed-needle U-100 insulin syringes after reading that dead space costs a fortune with luer fittings, and my yield improved a lot. But I still cannot…

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
content-assay
content-assay

Quantified content: how many milligrams of peptide are actually in the vial, measured against a calibrated reference standard. A separate test…

476 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
asked by mateo_iglesias 12k · 11 months ago
24 votes 5 answers20k views
How many units on a 0.3 mL insulin syringe is a 2 mg dose at 8 mg/mL?

Numbers first: a 0.3 mL insulin syringe · 2 mg · 8 mg/mL. This should be a straightforward calculation and I keep getting two different answers. The numbers are…

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 pk_curve 30k · 2.0 years ago
24 votes0 answers19k views
Can I reconstitute a GLP-1 receptor agonist at 4 mg/mL and still measure a small dose accurately?

What I have: a GLP-1 receptor agonist · 4 mg/mL. This is a planning question. I know what my options are; I do not know how to weigh them. What I want is the minimum…

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
asked by threadlock7 19k · 2.1 years ago
24 votes 3 answers18k views
After how many missed weeks does a titration ladder have to be restarted, and why that number?

I understand the single-missed-dose instructions. What I cannot find a clear derivation for is the longer break. The weight-management labels in this class address…

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
dose-escalation
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…

103 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 haze_check 9.3k · 4 months ago
24 votes0 answers16k views
How many units on a 1 mL luer-lock syringe is a 2.5 mg dose at 3.33 mg/mL?

For reference: a 1 mL luer-lock syringe · 2.5 mg · 3.33 mg/mL. I would rather understand the derivation than memorise the outcome. Two people I asked gave two answers…

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 amara_nwachukwu 20k · 13 months ago
24 votes5 answers14k views
Is 4 mg/mL a sensible working concentration for tirzepatide, or should I go lower?

The case in front of me: 4 mg/mL · tirzepatide. I would like the axes of comparison first and the recommendation second. I have tried the first option and it works;…

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
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 haze_check 9.3k · 9 months ago
24 votes5 answers14k views
If a liraglutide dose is missed by ten days, does the ladder reset?

For reference: liraglutide · ten days. I have read the obvious sources and they disagree with each other, so I would rather ask people who have actually done this. I…

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
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 marta_szymanska 10k · 11 months ago
24 votes5 answers12k views
How many vial-days does a 2.5 mg vial give at 4 mg/mL on a weekly schedule?

Conditions: 2.5 mg · 4 mg/mL. I want the working, not the result — I need to be able to redo it with different numbers. I care about the precision as well as 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
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 teodora_ilic 17k · 6 months ago
24 votes 5 answers12k views
What does STEP 4 report at the 2 mg dose level?

Details up front: STEP 4 · 2 mg. This is presented as though it settles something, and I am not convinced it does. I have two documents that appear to disagree, which…

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 t_oyelaran 79k · 4 months ago
24 votes 5 answers12k views
Is 10 mg in 2.5 mL of 0.9% sodium chloride a sensible presentation for cagrilintide?

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

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
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 ivo_paunovic 16k · 19 months ago
24 votes 5 answers11k views
How do I get 25 units out of a vial reconstituted to 1 mg/mL without guessing?

What I have: 25 units · 1 mg/mL. I can find plenty of assertions about this and almost no reasoning, which is usually a sign that nobody has checked. Assume no…

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
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 coldbox9 41k · 14 months ago
24 votes0 answers10k views
Can I reconstitute oral semaglutide at 4 mg/mL and still measure a small dose accurately?

For reference: oral semaglutide · 4 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 nils_karlberg 9.4k · 11 months ago
24 votes0 answers10k views
Is 8 mg/mL a sensible working concentration for ecnoglutide, or should I go lower?

The specifics, since they change the answer: 8 mg/mL · ecnoglutide. The comparison I want does not seem to exist anywhere in a form I can evaluate. I have read the…

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
ecnoglutide
ecnoglutide

A long-acting GLP-1 receptor agonist with a cAMP-biased signalling profile. A niche tag, mostly used for mechanism questions about biased agonism…

223 questions
asked by otto_brenner 12k · 7 months ago
24 votes0 answers9.1k views
If I reconstitute a 15 mg vial with 1.5 mL of phosphate-buffered diluent, what concentration do I end up with?

The specifics, since they change the answer: 15 mg · 1.5 mL · phosphate-buffered diluent. I would like the arithmetic checked rather than the conclusion asserted. I…

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 thabo_maseko 28k · 14 months ago
24 votes 1 answer8.4k views
What is the arithmetic to convert 8 mg in 2 mL into units on a U-100 scale?

Details up front: 8 mg · 2 mL. I can do the algebra. I am not confident about the conversion factors. If there is a standard way to lay this out, I would rather learn…

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 seamus_brady 15k · 7 months ago
24 votes5 answers4.3k views
Is 4 mg in 3 mL of phosphate-buffered diluent a sensible presentation for orforglipron?

For reference: 4 mg · 3 mL · phosphate-buffered diluent · orforglipron. I am at the decision point and I would rather think it through than improvise. I would rather…

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
orforglipron
orforglipron

A non-peptide, orally bioavailable small-molecule GLP-1 receptor agonist studied in the ATTAIN programme. It is not a peptide, which changes…

219 questions
asked by ines_delacruz 16k · 3 months ago
23 votes5 answers40k views
Is 2.5 mg/mL a sensible working concentration for tirzepatide, or should I go lower?

Concretely: 2.5 mg/mL · tirzepatide. These are treated as interchangeable and I do not think they are. If both are acceptable I would like to know that, so I can stop…

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
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 fresh_bac 9.7k · 2.2 years ago
23 votes 5 answers39k views
What does STEP 4 report at the 2.4 mg dose level?

Concretely: STEP 4 · 2.4 mg. The figures are clear enough; the question is what they mean and what they do not. I can supply the numbers if the specifics change the…

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 bridget_nyathi 12k · 22 months ago
23 votes0 answers35k views
How do I get 8 units out of a vial reconstituted to 3.33 mg/mL without guessing?

What I am working with: 8 units · 3.33 mg/mL. This is a procedural question rather than a theoretical one, and I would like the procedure rather than the theory. What…

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
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 rukhsana_iqbal 17k · 2.3 years ago
23 votes 5 answers30k views
If I reconstitute a 40 mg vial with 2.5 mL of 0.9% sodium chloride, what concentration do I end up with?

Concretely: 40 mg · 2.5 mL · 0.9% sodium chloride. I want the working, not the result — I need to be able to redo it with different numbers. I care about the…

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 ivo_paunovic 16k · 16 months ago
23 votes 5 answers29k views
How do I get 5 units out of a vial reconstituted to 4 mg/mL without guessing?

What I have: 5 units · 4 mg/mL. I can find plenty of assertions about this and almost no reasoning, which is usually a sign that nobody has checked. Assume no…

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
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 tabular_nums 71k · 13 months ago
23 votes 5 answers25k views
Why do two papers on STEP 2 report different headline figures?

I have the full paper rather than the abstract, and the supplementary appendix. I understand the observation; what I do not understand is the mechanism behind it. I…

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
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 w_okoye 43k · 9 months ago