PeptideStack
5.2kquestions
20kanswers
220users

dosing-math

Page 12 of 32 · 764 questions tagged dosing-math.

764 questions · sorted by votes · page 12 of 32

23 votes 5 answers24k views
If a dulaglutide dose is missed by fourteen days, does the ladder reset?

Concretely: dulaglutide · fourteen days. This is a procedural question rather than a theoretical one, and I would like the procedure rather than the theory. What 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
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 low_dead_space 37k · 11 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…

117 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 priya_menon 13k · 23 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…

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 carys_meredith 12k · 18 months ago
23 votes 5 answers16k views
How many units on a 0.5 mL insulin syringe is a 4 mg dose at 8 mg/mL?

Stated plainly: a 0.5 mL insulin syringe · 4 mg · 8 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…

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 g_paskevicius 60k · 2.2 years ago
23 votes 5 answers16k views
What does SUSTAIN-6 report at the 1 mg dose level?

Concretely: SUSTAIN-6 · 1 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…

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 ruaidhri_o_shea 25k · 23 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…

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
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
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 leah_ferrers 12k · 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…

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 w_okoye 43k · 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…

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

Concretely: retatrutide · fourteen days. This is a procedural question rather than a theoretical one, and I would like the procedure rather than the theory. What 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
retatrutide
retatrutide

An investigational GLP-1, GIP and glucagon receptor tri-agonist, studied in the TRIUMPH programme. Not approved anywhere. Use this tag for…

251 questions
asked by grainne_ahearn 50k · 7 months ago
23 votes3 answers9.8k views
Is 5 mg/mL a sensible working concentration for dulaglutide, or should I go lower?

What I have: 5 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…

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 leonid_marchuk 19k · 18 months ago
23 votes 5 answers9k views
How does fatty-acid acylation produce a seven-day half-life?

I would like to know how much of this is established and how much is a reasonable story. I would like the mechanism, because I want to be able to reason about the…

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…

132 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
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 tabular_nums 71k · 3 months ago
23 votes 5 answers8.7k views
If I reconstitute a 40 mg vial with 3 mL of 0.9% sodium chloride, what concentration do I end up with?

The case in front of me: 40 mg · 3 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…

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 jo_vandeberg 23k · 6 months ago
23 votes0 answers8.3k views
Is 5 mg/mL a sensible working concentration for ecnoglutide, or should I go lower?

For reference: 5 mg/mL · ecnoglutide. The comparison I want does not seem to exist anywhere in a form I can evaluate. I have read the arguments for each and they do…

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 vial_five 12k · 4 months ago
23 votes 3 answers8.3k views
Is 4 mg/mL a sensible working concentration for mazdutide, or should I go lower?

What I am working with: 4 mg/mL · mazdutide. I suspect the honest answer is that it depends, in which case I would like to know on what. Assume I can obtain either…

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
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 thermal_mass 13k · 11 months ago
23 votes4 answers7.6k views
What does SELECT report at the 1 mg dose level?

What I am working with: SELECT · 1 mg. I would like help reading this properly rather than being told what conclusion to reach. I have the full report including 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 sunniva_dahl 22k · 5 months ago
23 votes2 answers7.4k views
If I reconstitute a 2 mg vial with 0.5 mL of sterile water for injection, what concentration do I end up with?

Numbers first: 2 mg · 0.5 mL · sterile water for injection. I can do the algebra. I am not confident about the conversion factors. If there is a standard way to lay…

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 swirl_dont_shake 10k · 3 months ago
23 votes 5 answers7.4k views
If I reconstitute a 10 mg vial with 3 mL of 0.9% sodium chloride, what concentration do I end up with?

Conditions: 10 mg · 3 mL · 0.9% sodium chloride. Please show the division. I want to check my own against yours. I would like the general form as well as the specific…

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 mateo_iglesias 12k · 10 months ago
23 votes0 answers6.4k views
How does orforglipron at 12 mg weekly compare on cost per milligram across routes?

Setup, so nobody has to ask: orforglipron · 12 mg. The units are where I keep going wrong, so please be explicit about them. I have sanity-checked the order of…

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
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 · 9 months ago
23 votes 3 answers4.6k views
What is the dead-space loss per draw with a 25G drawing needle at 8 mg/mL?

Concretely: a 25G drawing needle · 8 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…

117 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 eighty_six_hours 20k · 2 months ago
23 votes0 answers3.3k views
If I add 2 mL of BAC water to a 10 mg vial, how many units is a 0.5 mg dose?

My setup is a refrigerator with a logger and a small work area I wipe down, nothing more. I want the working, not the result — I need to be able to redo it with…

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
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 rota_site 36k · 3 months ago
22 votes 5 answers35k views
Can I reconstitute retatrutide at 2 mg/mL and still measure a small dose accurately?

Stated plainly: retatrutide · 2 mg/mL. I would like to set this up properly once, rather than adjust it repeatedly. My budget is real but not tight, and my tolerance…

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
retatrutide
retatrutide

An investigational GLP-1, GIP and glucagon receptor tri-agonist, studied in the TRIUMPH programme. Not approved anywhere. Use this tag for…

251 questions
asked by retest_please 9.7k · 19 months ago
22 votes 5 answers29k views
Is 6.67 mg/mL a sensible working concentration for cagrilintide, or should I go lower?

Stated plainly: 6.67 mg/mL · cagrilintide. Both of these get recommended confidently by different people, which suggests neither is obviously right. My constraints…

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 nominal_ten 12k · 19 months ago
22 votes5 answers29k views
Can I reconstitute cagrilintide at 10 mg/mL and still measure a small dose accurately?

Numbers first: cagrilintide · 10 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 ivo_paunovic 16k · 13 months ago
22 votes 5 answers29k views
If a mazdutide dose is missed by twenty-one days, does the ladder reset?

What I am working with: mazdutide · twenty-one days. I would like to understand the steps well enough to explain them to someone else. I have access to a refrigerator…

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
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 two_point_four 8.9k · 13 months ago