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dosing-math

Page 8 of 34 · 811 questions tagged dosing-math.

811 questions · sorted by votes · page 8 of 34

28 votes 5 answers24k views
How many units on a 0.3 mL insulin syringe is a 20 mg dose at 3.33 mg/mL?

For reference: a 0.3 mL insulin syringe · 20 mg · 3.33 mg/mL. I would like the arithmetic checked rather than the conclusion asserted. I have deliberately not used an…

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 hana_petrikova 19k · 21 months ago
28 votes5 answers23k views
What does REDEFINE-1 report at the 60 mg dose level?

The specifics, since they change the answer: REDEFINE-1 · 60 mg. I have the document in front of me and I can read the numbers. What I cannot do is interpret them. 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 marta_szymanska 17k · 14 months ago
28 votes 5 answers23k views
Why does a 1 mL luer-lock syringe read differently from the volume I thought I drew at 1 mg/mL?

The specifics, since they change the answer: a 1 mL luer-lock syringe · 1 mg/mL. An unexpected observation, and I would like a differential rather than reassurance.…

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
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
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 rania_haddad 17k · 20 months ago
28 votes2 answers22k views
What does PIONEER-4 report at the 30 mg dose level?

Concretely: PIONEER-4 · 30 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 k_szabo 45k · 16 months ago
28 votes5 answers20k views
How many units on a U-100 insulin syringe is a 10 mg dose at 8 mg/mL?

Details up front: a U-100 insulin syringe · 10 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…

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 tabular_nums 47k · 7 months ago
28 votes0 answers18k views
What does STEP 5 report at the 30 mg dose level?

The case in front of me: STEP 5 · 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,…

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 wren_calloway 14k · 10 months ago
28 votes0 answers14k views
Can I reconstitute liraglutide at 10 mg/mL and still measure a small dose accurately?

The specifics, since they change the answer: liraglutide · 10 mg/mL. 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
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 cal_hennessy 14k · 12 months ago
28 votes 5 answers14k views
Is 20 mg in 2 mL of bacteriostatic water a sensible presentation for liraglutide?

Setup, so nobody has to ask: 20 mg · 2 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…

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 nadia_kowalczyk 14k · 16 months ago
28 votes 5 answers13k views
How many units on a U-40 insulin syringe is a 2 mg dose at 1 mg/mL?

The case in front of me: a U-40 insulin syringe · 2 mg · 1 mg/mL. Please show the division. I want to check my own against yours. I would like the general form as…

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 low_dead_space 42k · 8 months ago
28 votes5 answers12k views
Is 60 mg in 3 mL of bacteriostatic water a sensible presentation for tirzepatide?

Setup, so nobody has to ask: 60 mg · 3 mL · bacteriostatic water · tirzepatide. I would like to set this up properly once, rather than adjust it repeatedly. My budget…

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 sample_id 17k · 16 months ago
28 votes1 answer11k views
Does splitting a 4 mg weekly dose of ecnoglutide across two administrations change anything?

The specifics, since they change the answer: 4 mg · ecnoglutide. I would like the mechanism, because I want to be able to reason about the cases nobody has written…

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 seamus_brady 17k · 8 months ago
28 votes 5 answers10k views
Is 4 mg weekly a defensible maintenance dose for semaglutide?

The specifics, since they change the answer: 4 mg · semaglutide. I would like to define my thresholds before I have a result, for obvious reasons. I want a plan with…

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 anders_vestby 17k · 12 months ago
28 votes0 answers9.7k views
What does STEP 2 report at the 2.5 mg dose level?

Numbers first: STEP 2 · 2.5 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…

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 mg_per_ml 12k · 10 months ago
28 votes5 answers8.3k views
How many units on a U-100 insulin syringe is a 20 mg dose at 2 mg/mL?

For reference: a U-100 insulin syringe · 20 mg · 2 mg/mL. I would like the arithmetic checked rather than the conclusion asserted. I have deliberately not used an…

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 marta_szymanska 17k · 8 months ago
28 votes 5 answers7.3k views
Is 60 mg in 2 mL of bacteriostatic water a sensible presentation for tirzepatide?

Setup, so nobody has to ask: 60 mg · 2 mL · bacteriostatic water · tirzepatide. 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…

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 zainab_mustafa 16k · 7 months ago
27 votes 5 answers60k views
How do I convert the SURMOUNT-OSA hazard ratio into an absolute risk reduction?

This is a question about interpretation, not about whether to act — I will take action questions elsewhere. I want the working, not the result — I need to be able to…

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…

111 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 unit_math 13k · 2.3 years ago
27 votes 5 answers57k views
Is 10 mg/mL a sensible working concentration for cagrilintide, or should I go lower?

Setup, so nobody has to ask: 10 mg/mL · cagrilintide. I suspect the honest answer is that it depends, in which case I would like to know on what. Assume I can obtain…

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 dead_volume 49k · 2.2 years ago
27 votes 5 answers51k views
How do I compute the +5 charge state m/z for a peptide of 4813.5 Da?

The case in front of me: +5 · 4813.5 Da. 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…

mass-spec
mass-spec

Mass spectrometry for identity confirmation: electrospray ionisation, multiple charge states, monoisotopic versus average mass, deconvolution, and…

38 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
purity
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 questions
asked by leah_ferrers 15k · 22 months ago
27 votes 3 answers43k views
How many units on a U-40 insulin syringe is a 50 mg dose at 2.5 mg/mL?

Setup, so nobody has to ask: a U-40 insulin syringe · 50 mg · 2.5 mg/mL. The units are where I keep going wrong, so please be explicit about them. I have…

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 nkem_obiora 46k · 22 months ago
27 votes 5 answers41k views
How many vial-days does a 30 mg vial give at 4 mg/mL on a weekly schedule?

Numbers first: 30 mg · 4 mg/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…

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 lane_transit 42k · 18 months ago
27 votes 5 answers39k views
Is 8 mg in 2 mL of sterile water for injection a sensible presentation for survodutide?

What I have: 8 mg · 2 mL · sterile water for injection · survodutide. This is a planning question. I know what my options are; I do not know how to weigh them. What I…

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 klara_novotna 16k · 18 months ago
27 votes 5 answers38k views
How many vial-days does a 8 mg vial give at 2.5 mg/mL on a weekly schedule?

Details up front: 8 mg · 2.5 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…

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 low_dead_space 42k · 19 months ago
27 votes 5 answers37k views
Is 40 mg in 0.5 mL of 0.9% sodium chloride a sensible presentation for a GLP-1 receptor agonist?

Concretely: 40 mg · 0.5 mL · 0.9% sodium chloride · a GLP-1 receptor agonist. The failure mode I am trying to avoid is making this decision emotionally. I have twelve…

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 mateo_iglesias 16k · 23 months ago
27 votes5 answers36k views
How does ecnoglutide at 8 mg weekly compare on cost per milligram across routes?

The case in front of me: ecnoglutide · 8 mg. Please show the division. I want to check my own against yours. I would like the general form as well as the specific…

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 k_szabo 45k · 16 months ago