PeptideStack
5.2kquestions
20kanswers
220users

dosing-math

Page 31 of 32 · 764 questions tagged dosing-math.

764 questions · sorted by votes · page 31 of 32

4 votes 2 answers2k views
If I reconstitute a 30 mg vial with 1.5 mL of sterile water for injection, what concentration do I end up with?

Details up front: 30 mg · 1.5 mL · sterile water for injection. This should be a straightforward calculation and I keep getting two different answers. The numbers are…

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
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
asked by sian_llewellyn 65k · 43 days ago
4 votes0 answers1.4k views
Can I reconstitute cagrilintide at 1 mg/mL and still measure a small dose accurately?

Numbers first: cagrilintide · 1 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 work…

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 seven_day_half 31k · 4 months ago
4 votes0 answers945 views
Is 30 mg in 1.5 mL of sterile water for injection a sensible presentation for ecnoglutide?

Details up front: 30 mg · 1.5 mL · sterile water for injection · ecnoglutide. This is a planning question. I know what my options are; I do not know how to weigh…

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
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 wren_calloway 23k · 6 months ago
4 votes0 answers504 views
Can I reconstitute semaglutide at 3.33 mg/mL and still measure a small dose accurately?

Conditions: semaglutide · 3.33 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,…

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
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 retest_please 9.7k · 16 days ago
3 votes 5 answers15k views
How do I compute the +4 charge state m/z for a peptide of 4813.5 Da?

The specifics, since they change the answer: +4 · 4813.5 Da. I would rather understand the derivation than memorise the outcome. Two people I asked gave two answers…

mass-spec
mass-spec

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

52 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
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…

833 questions
asked by bea_forsberg 11k · 16 months ago
3 votes 4 answers15k views
How many vial-days does a 2 mg vial give at 2.5 mg/mL on a weekly schedule?

Numbers first: 2 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 what…

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 micron22 22k · 17 months ago
3 votes5 answers7.8k views
How do I convert the SOUL 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 ilaria_bertone 33k · 14 months ago
3 votes 5 answers4.9k views
What does SURMOUNT-2 report at the 15 mg dose level?

The case in front of me: SURMOUNT-2 · 15 mg. The figures are clear enough; the question is what they mean and what they do not. I can supply the numbers if 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 bufferline42 30k · 2 months ago
3 votes 5 answers4.8k views
How does survodutide at 2.4 mg weekly compare on cost per milligram across routes?

Concretely: survodutide · 2.4 mg. 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…

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
vendor-comparison
vendor-comparison

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

388 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
survodutide
survodutide

A GLP-1 and glucagon receptor dual agonist with a substantial published MASH dataset. Use this tag for its hepatic endpoints, its dose ladder, and…

225 questions
asked by zeynep_arslan 16k · 2 months ago
3 votes5 answers4.4k views
How many vial-days does a 5 mg vial give at 5 mg/mL on a weekly schedule?

Stated plainly: 5 mg · 5 mg/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
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 fibre_or_fragment 13k · 7 months ago
3 votes 1 answer3.7k views
Is 20 mg/mL a sensible working concentration for dulaglutide, or should I go lower?

What I have: 20 mg/mL · dulaglutide. I want to know what the trade-off actually is rather than which option is fashionable. I would rather have a defensible reason…

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 leah_ferrers 12k · 8 months ago
3 votes 5 answers3.5k views
How does survodutide at 12.5 mg weekly compare on cost per milligram across routes?

Concretely: survodutide · 12.5 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,…

260 questions
vendor-comparison
vendor-comparison

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

388 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
survodutide
survodutide

A GLP-1 and glucagon receptor dual agonist with a substantial published MASH dataset. Use this tag for its hepatic endpoints, its dose ladder, and…

225 questions
asked by fib4_reader 24k · 6 months ago
3 votes 5 answers3.4k views
Is 12.5 mg weekly a defensible maintenance dose for mazdutide?

What I am working with: 12.5 mg · mazdutide. I am trying to build something sustainable rather than something thorough that I will abandon. I have already decided the…

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…

54 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
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 dmitri_savchuk 27k · 7 months ago
3 votes 1 answer3k views
How does tirzepatide at 10 mg weekly compare on cost per milligram across routes?

The particulars: tirzepatide · 10 mg. I would rather understand the derivation than memorise the outcome. Two people I asked gave two answers that differ by a factor…

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
vendor-comparison
vendor-comparison

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

388 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 rune_thoresen 16k · 10 months ago
3 votes5 answers2.2k views
How many units on a low-dead-space syringe is a 4 mg dose at 6.67 mg/mL?

Concretely: a low-dead-space syringe · 4 mg · 6.67 mg/mL. Please show the division. I want to check my own against yours. I would like the general form 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
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 thermal_mass 13k · 5 months ago
3 votes 5 answers2.1k views
How does ecnoglutide at 12.5 mg weekly compare on cost per milligram across routes?

Conditions: ecnoglutide · 12.5 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,…

260 questions
vendor-comparison
vendor-comparison

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

388 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 juliette_farnese 13k · 3 months ago
3 votes0 answers1.6k views
Can I reconstitute a GLP-1 receptor agonist at 1 mg/mL and still measure a small dose accurately?

What I have: a GLP-1 receptor agonist · 1 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 unit_math 6.2k · 10 months ago
3 votes0 answers1.5k views
How do I get 15 units out of a vial reconstituted to 4 mg/mL without guessing?

Numbers first: 15 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 assay_blank 45k · 17 months ago
3 votes0 answers1.2k views
Can I reconstitute survodutide at 3.33 mg/mL and still measure a small dose accurately?

The case in front of me: survodutide · 3.33 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…

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
survodutide
survodutide

A GLP-1 and glucagon receptor dual agonist with a substantial published MASH dataset. Use this tag for its hepatic endpoints, its dose ladder, and…

225 questions
asked by olu_babatunde 6.2k · 40 days ago
3 votes0 answers1.1k views
Is 20 mg/mL a sensible working concentration for orforglipron, or should I go lower?

Numbers first: 20 mg/mL · orforglipron. 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…

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 shear_at_the_front 17k · 31 days ago
2 votes 5 answers23k views
If I reconstitute a 20 mg vial with 2.5 mL of bacteriostatic water, what concentration do I end up with?

Stated plainly: 20 mg · 2.5 mL · bacteriostatic water. The units are where I keep going wrong, so please be explicit about them. I have sanity-checked the order of…

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
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
asked by day_seven_trough 6.7k · 2.2 years ago
2 votes 5 answers19k views
What is the arithmetic to convert 10 mg in 3 mL into units on a U-100 scale?

The case in front of me: 10 mg · 3 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 Dr_Ravi_Selvarajah 35k · 2.1 years ago
2 votes 5 answers17k views
What does STEP 1 report at the 2.4 mg dose level?

Setup, so nobody has to ask: STEP 1 · 2.4 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…

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 retest_please 9.7k · 2.0 years ago
2 votes 5 answers16k views
What is the arithmetic to convert 5 mg in 1.5 mL into units on a U-100 scale?

Setup, so nobody has to ask: 5 mg · 1.5 mL. I have worked this out and I would like someone to find the error, because I suspect there is one. My working so far, for…

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 cake_collapsed 14k · 18 months ago