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dosing-math

Page 12 of 34 · 811 questions tagged dosing-math.

811 questions · sorted by votes · page 12 of 34

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…

308 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…

268 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…

811 questions
asked by nils_karlberg 13k · 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…

308 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,…

330 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…

811 questions
asked by otto_brenner 19k · 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,…

330 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…

308 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…

811 questions
asked by thabo_maseko 20k · 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…

811 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…

268 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,…

330 questions
asked by seamus_brady 17k · 7 months ago
24 votes 3 answers7.6k views
How many units on a 1 mL luer-lock syringe is a 20 mg dose at 2 mg/mL?

The particulars: a 1 mL luer-lock syringe · 20 mg · 2 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…

811 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…

268 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,…

330 questions
asked by fibre_or_fragment 12k · 11 months ago
24 votes5 answers4.3k views
Is 4 mg in 5 mL of phosphate-buffered diluent a sensible presentation for orforglipron?

For reference: 4 mg · 5 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…

308 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,…

330 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…

811 questions
asked by ines_delacruz 16k · 3 months ago
23 votes 5 answers39k views
What does STEP 4 report at the 2 mg dose level?

Concretely: STEP 4 · 2 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…

913 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…

811 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…

444 questions
asked by bridget_nyathi 16k · 22 months ago
23 votes 5 answers39k views
Is 2.5 mg weekly a defensible maintenance dose for tirzepatide?

The case in front of me: 2.5 mg · tirzepatide. I want to decide this in advance so that I am not deciding it under pressure later. Assume I will follow the plan I…

maintenance-dose
maintenance-dose

Staying put: the lowest dose that holds a result, the difference between the maximum studied dose and the maximum useful dose, and what the…

44 questions
clinical-trials
clinical-trials

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

913 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…

811 questions
asked by ayo_fadipe 19k · 21 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…

268 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…

811 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…

308 questions
asked by rukhsana_iqbal 14k · 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,…

330 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…

308 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…

811 questions
asked by ivo_paunovic 15k · 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…

268 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…

811 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…

308 questions
asked by tabular_nums 47k · 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…

913 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…

811 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…

360 questions
asked by w_okoye 40k · 9 months ago
23 votes 5 answers24k views
If a dulaglutide dose is missed by fourteen days, does the ladder reset?

Setup, so nobody has to ask: dulaglutide · fourteen days. This is a procedural question rather than a theoretical one, and I would like the procedure rather than the…

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…

444 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…

811 questions
asked by low_dead_space 42k · 11 months ago
23 votes 5 answers22k views
How many vial-days does a 50 mg vial give at 6.67 mg/mL on a weekly schedule?

The particulars: 50 mg · 6.67 mg/mL. I would like the arithmetic checked rather than the conclusion asserted. I have deliberately not used an online calculator…

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…

811 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,…

261 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…

308 questions
asked by tess_amankwah 48k · 10 months ago
23 votes 5 answers18k views
What is the dead-space loss per draw with a 25G drawing needle at 3.33 mg/mL?

Concretely: a 25G drawing needle · 3.33 mg/mL. Please show the division. I want to check my own against yours. I would like the general form as well as the specific…

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…

110 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…

268 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…

811 questions
asked by priya_menon 11k · 23 months ago
23 votes 5 answers18k views
How does survodutide at 30 mg weekly compare on cost per milligram across routes?

Conditions: survodutide · 30 mg. Please show the division. I want to check my own against yours. I would like the general form as well as the specific number, so I…

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,…

261 questions
vendor-comparison
vendor-comparison

Side-by-side comparison of suppliers on measurable axes - independently confirmed purity and content, lead time, cold-chain handling,…

351 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…

811 questions
asked by lucia_marchetti 18k · 22 months ago
23 votes5 answers17k views
Can I reconstitute a GLP-1 receptor agonist at 6.67 mg/mL and still measure a small dose accurately?

What I have: a GLP-1 receptor agonist · 6.67 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…

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…

308 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…

268 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…

811 questions
asked by carys_meredith 17k · 18 months ago
23 votes 5 answers16k views
How many units on a 0.5 mL insulin syringe is a 4 mg dose at 2.5 mg/mL?

Stated plainly: a 0.5 mL insulin syringe · 4 mg · 2.5 mg/mL. I have worked this out and I would like someone to find the error, because I suspect there is one. My…

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…

811 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…

268 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,…

330 questions
asked by g_paskevicius 44k · 2.2 years ago
23 votes 5 answers16k views
What does SUSTAIN-6 report at the 30 mg dose level?

Concretely: SUSTAIN-6 · 30 mg. I would like to know the limits of what can be inferred from this. What I am trying to avoid is over-reading a single result, which I…

clinical-trials
clinical-trials

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

913 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…

811 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…

444 questions
asked by ruaidhri_o_shea 51k · 23 months ago
23 votes 5 answers14k views
Does splitting a 40 mg weekly dose of tirzepatide across two administrations change anything?

The case in front of me: 40 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…

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…

39 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…

811 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…

175 questions
asked by kirsi_lahtinen 45k · 16 months ago
23 votes 5 answers13k views
Is 20 mg in 3 mL of bacteriostatic water a sensible presentation for tirzepatide?

What I am working with: 20 mg · 3 mL · bacteriostatic water · tirzepatide. I would like to set this up properly once, rather than adjust it repeatedly. My budget is…

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…

308 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,…

330 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…

811 questions
asked by leah_ferrers 15k · 17 months ago
23 votes 4 answers13k views
What is the smallest dose I can measure reliably on a 0.3 mL U-100 syringe?

I keep a written log of every draw with date, volume and syringe type. I can do the algebra. I am not confident about the conversion factors. If there is a standard…

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…

268 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…

811 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…

308 questions
asked by w_okoye 40k · 8 months ago
23 votes3 answers13k views
How do I get 15 units out of a vial reconstituted to 1 mg/mL without guessing?

What I have: 15 units · 1 mg/mL. I would like to understand the steps well enough to explain them to someone else. I have access to a refrigerator with a logger and a…

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…

268 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…

811 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…

308 questions
asked by samir_bennani 13k · 15 months ago
23 votes4 answers11k views
If a retatrutide dose is missed by fourteen days, does the ladder reset?

What I am working with: retatrutide · fourteen days. This is a procedural question rather than a theoretical one, and I would like the procedure rather than the…

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…

444 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…

811 questions
asked by grainne_ahearn 13k · 7 months ago