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dosing-math

Page 20 of 34 · 811 questions tagged dosing-math.

811 questions · sorted by votes · page 20 of 34

17 votes 3 answers18k views
List price, net price, coupon price — which one am I actually paying, and how do I model 12 months?

I have now seen four different prices for the same product quoted as though each were the real one: a list price in the region of $1,300 a month, a "net price" figure…

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
insurance
insurance

Coverage: formulary tiers, exclusion versus non-coverage, the difference a diabetes indication makes, employer carve-outs, and what an appeal…

35 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 rhian_prydderch 44k · 3 months ago
17 votes 5 answers17k views
Does splitting a 2 mg weekly dose of retatrutide across two administrations change anything?

Details up front: 2 mg · retatrutide. I can predict the outcome but I cannot explain it, which means I will get the next case wrong. I would like to know how…

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
glucagon-receptor
glucagon-receptor

Glucagon receptor agonism as a deliberate component of dual and tri-agonists: what it adds in energy expenditure and hepatic fat mobilisation, and…

14 questions
asked by kofi_mensah 12k · 8 months ago
17 votes5 answers17k views
How do I get 30 units out of a vial reconstituted to 20 mg/mL without guessing?

The case in front of me: 30 units · 20 mg/mL. I am trying to do this correctly the first time rather than learn it by getting it wrong. I have already made one…

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 bridget_nyathi 16k · 17 months ago
17 votes5 answers16k views
How many vial-days does a 4 mg vial give at 4 mg/mL on a weekly schedule?

The specifics, since they change the answer: 4 mg · 4 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
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 cal_hennessy 14k · 12 months ago
17 votes 5 answers16k views
What does SOUL report at the 60 mg dose level?

For reference: SOUL · 60 mg. I have the document in front of me and I can read the numbers. What I cannot do is interpret them. I am reasonably comfortable with…

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
pcos
pcos

Polycystic ovary syndrome: insulin resistance as the shared mechanism, ovulatory and menstrual outcomes reported on treatment, androgen changes,…

14 questions
asked by aine_mulcahy 35k · 6 months ago
17 votes0 answers13k views
How many vial-days does a 4 mg vial give at 6.67 mg/mL on a weekly schedule?

For reference: 4 mg · 6.67 mg/mL. I would rather understand the derivation than memorise the outcome. Two people I asked gave two answers that differ by a factor of…

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 tadhg_o_riordan 14k · 11 months ago
17 votes 5 answers13k views
How many units on a U-100 insulin syringe is a 20 mg dose at 5 mg/mL?

The particulars: a U-100 insulin syringe · 20 mg · 5 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 ines_delacruz 16k · 23 months ago
17 votes3 answers12k views
Can I reconstitute survodutide at 8 mg/mL and still measure a small dose accurately?

Conditions: survodutide · 8 mg/mL. I want to decide this in advance so that I am not deciding it under pressure later. Assume I will follow the plan I write down, so…

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 anders_vestby 17k · 17 months ago
17 votes 2 answers10k views
How many vial-days does a 15 mg vial give at 10 mg/mL on a weekly schedule?

The specifics, since they change the answer: 15 mg · 10 mg/mL. I would like the arithmetic checked rather than the conclusion asserted. I have deliberately not used…

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 jonas_ekstrom 18k · 2.1 years ago
17 votes4 answers9.7k views
Can I reconstitute ecnoglutide at 3.33 mg/mL and still measure a small dose accurately?

Conditions: ecnoglutide · 3.33 mg/mL. The failure mode I am trying to avoid is making this decision emotionally. I have twelve months in view and I would like 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
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 plunger_stop 18k · 9 months ago
17 votes 5 answers9.4k views
If I reconstitute a 10 mg vial with 1 mL of 0.9% sodium chloride, what concentration do I end up with?

Concretely: 10 mg · 1 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 precision…

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 ravenna_pace 13k · 18 months ago
17 votes 2 answers9.3k views
If I miss a dose by three days, does the ladder reset?

I have read the prescribing information and it addresses the adjacent case but not this one. I want a method I can write down and repeat, not a rule of thumb. I would…

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 carys_meredith 17k · 6 months ago
17 votes5 answers8k views
What is the arithmetic to convert 4 mg in 2 mL into units on a U-100 scale?

For reference: 4 mg · 2 mL. I would rather understand the derivation than memorise the outcome. Two people I asked gave two answers that differ by a factor of ten,…

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 orla_ferriter 47k · 8 months ago
17 votes5 answers7.9k views
How do I get 4 units out of a vial reconstituted to 5 mg/mL without guessing?

Concretely: 4 units · 5 mg/mL. I have done this once and I suspect I got away with it rather than got it right. For context: I keep records of every batch, every lot…

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 klara_novotna 16k · 3 months ago
17 votes5 answers7.4k views
How does tirzepatide at 20 mg weekly compare on cost per milligram across routes?

The particulars: tirzepatide · 20 mg. I would like the arithmetic checked rather than the conclusion asserted. I have deliberately not used an online calculator…

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 ilaria_bertone 43k · 9 months ago
17 votes0 answers6k views
Does splitting a 30 mg weekly dose of orforglipron across two administrations change anything?

Numbers first: 30 mg · orforglipron. I can predict the outcome but I cannot explain it, which means I will get the next case wrong. I would like to know how confident…

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
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.…

14 questions
asked by teodora_ilic 15k · 4 months ago
17 votes5 answers6k views
How many units on a 0.5 mL insulin syringe is a 50 mg dose at 1 mg/mL?

What I am working with: a 0.5 mL insulin syringe · 50 mg · 1 mg/mL. I have worked this out and I would like someone to find the error, because I suspect there is one.…

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 ines_delacruz 16k · 4 months ago
17 votes0 answers5.4k views
What does SURMOUNT-OSA report at the 50 mg dose level?

What I am working with: SURMOUNT-OSA · 50 mg. I would like help reading this properly rather than being told what conclusion to reach. I have the full report…

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 vial_five 15k · 4 months ago
17 votes0 answers4.4k views
Is 2.5 mg in 2.5 mL of 0.9% sodium chloride a sensible presentation for a GLP-1 receptor agonist?

Conditions: 2.5 mg · 2.5 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.…

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 greta_holzmann 15k · 7 months ago
16 votes 5 answers14k views
Is 2.5 mg/mL a sensible working concentration for cagrilintide, or should I go lower?

What I am working with: 2.5 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 assay_blank 39k · 11 months ago
16 votes 5 answers12k views
Is 15 mg weekly a defensible maintenance dose for survodutide?

For reference: 15 mg · survodutide. I would like to define my thresholds before I have a result, for obvious reasons. I want a plan with explicit stopping rules, not…

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 cake_intact 18k · 5 months ago
16 votes 5 answers11k views
How many units on a U-100 insulin syringe is a 40 mg dose at 5 mg/mL?

What I have: a U-100 insulin syringe · 40 mg · 5 mg/mL. I can do the algebra. I am not confident about the conversion factors. If there is a standard way to lay this…

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 · 6 months ago
16 votes 5 answers11k views
How do I convert the STEP 4 hazard ratio into an absolute risk reduction?

I am reading the trial table rather than the press release, which is why the numbers differ. I would like the arithmetic checked rather than the conclusion asserted.…

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 fiadh_cronin 14k · 19 months ago
16 votes5 answers11k views
Is 2 mg/mL a sensible working concentration for dulaglutide, or should I go lower?

What I have: 2 mg/mL · dulaglutide. I have used one of these for a while and I am considering switching, which requires a reason. What I care about 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 Dr_Sara_Kuusela 46k · 4 months ago