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dosing-math

Page 9 of 34 · 811 questions tagged dosing-math.

811 questions · sorted by votes · page 9 of 34

27 votes5 answers36k views
How many vial-days does a 2.5 mg vial give at 2 mg/mL on a weekly schedule?

Conditions: 2.5 mg · 2 mg/mL. 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…

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 coring_risk 17k · 21 months ago
27 votes5 answers35k views
How many weeks to steady state for orforglipron on a weekly schedule?

This matters because it predicts what a related molecule should do. The units are where I keep going wrong, so please be explicit about them. I have sanity-checked…

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
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 gradient_slope 41k · 17 months ago
27 votes 5 answers33k views
What is the arithmetic to convert 2.5 mg in 2 mL into units on a U-100 scale?

Conditions: 2.5 mg · 2 mL. 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 value —…

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 ravenna_pace 13k · 2.1 years ago
27 votes 5 answers29k views
How do I convert a 2.5 mg/mL concentration to units on a U-100 syringe?

This is the third vial from the same lot, so I can compare against two known-good ones. I would like the arithmetic checked rather than the conclusion asserted. I…

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 ten_mg_vial 16k · 18 months ago
27 votes 5 answers29k views
What does SURMOUNT-4 report at the 30 mg dose level?

Conditions: SURMOUNT-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…

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 coldbox9 13k · 19 months ago
27 votes 5 answers27k views
How do I compute the +4 charge state m/z for a peptide of 3751.0 Da?

The specifics, since they change the answer: +4 · 3751.0 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…

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 lyoph_cake 95k · 18 months ago
27 votes 5 answers27k views
What does PIONEER-4 report at the 2 mg dose level?

The case in front of me: PIONEER-4 · 2 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…

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
sleep-apnea
sleep-apnea

Obstructive sleep apnoea and the apnoea-hypopnoea index response to weight loss, including the SURMOUNT-OSA dataset and the question of whether…

14 questions
asked by esther_vandeVelde 49k · 2.3 years ago
27 votes 5 answers23k views
How many units on a 0.5 mL insulin syringe is a 8 mg dose at 4 mg/mL?

Conditions: a 0.5 mL insulin syringe · 8 mg · 4 mg/mL. I want the working, not the result — I need to be able to redo it with different numbers. I care about 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…

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 tobias_maartens 94k · 2.2 years ago
27 votes 5 answers21k views
What does FLOW report at the 60 mg dose level?

The specifics, since they change the answer: FLOW · 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…

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 stopper_core 50k · 11 months ago
27 votes0 answers18k views
Is 10 mg weekly a defensible maintenance dose for tirzepatide?

Conditions: 10 mg · tirzepatide. The failure mode I am trying to avoid is making this decision emotionally. I have twelve months in view and I would like the plan to…

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 ines_delacruz 16k · 2.0 years ago
27 votes5 answers16k views
Why does a low-dead-space syringe read differently from the volume I thought I drew at 3.33 mg/mL?

Stated plainly: a low-dead-space syringe · 3.33 mg/mL. I noticed this today and I have not touched anything since, in case the state is diagnostic. I have not…

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 assay_blank 39k · 19 months ago
27 votes 3 answers16k views
How many units on a U-100 insulin syringe is a 60 mg dose at 20 mg/mL?

The specifics, since they change the answer: a U-100 insulin syringe · 60 mg · 20 mg/mL. I would rather understand the derivation than memorise the outcome. Two…

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 eoin_mcgarry 16k · 13 months ago
27 votes 5 answers14k views
What does SUSTAIN-6 report at the 50 mg dose level?

Setup, so nobody has to ask: SUSTAIN-6 · 50 mg. I have read the primary source rather than the summary, which has left me with more questions. I understand 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 Dr_Fatima_Belkacem 52k · 16 months ago
27 votes 3 answers9.9k views
How many draws do I need before a lab trend means anything? My ALT went 24 to 41

Baseline ALT was 24 U/L. Fourteen weeks into semaglutide it came back at 41 U/L, still inside the lab's quoted range of 0 to 50 but a 71% rise from where I started. I…

bloodwork
bloodwork

Laboratory monitoring: which panels are worth ordering, sensible intervals, reference-range versus optimal-range arguments, and how to read a…

284 questions
liver-enzymes
liver-enzymes

ALT, AST, GGT and ALP: what they do and do not indicate about hepatic fat, why enzymes are a poor surrogate for histology, and where non-invasive…

50 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_Signe_Baldursdottir 46k · 14 months ago
27 votes0 answers9.5k views
What is the arithmetic to convert 2.5 mg in 0.5 mL into units on a U-100 scale?

Conditions: 2.5 mg · 0.5 mL. 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 value…

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 a_lindgren 46k · 10 months ago
27 votes0 answers8.4k views
What is the most common avoidable mistake in reconstitution?

This is the third vial from the same lot, so I can compare against two known-good ones. I suspect the usual explanation for this is wrong, or at least incomplete. 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
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
harm-reduction
harm-reduction

Reducing avoidable risk where a decision has already been made: independent verification before use, sterility practice, dose arithmetic checked…

445 questions
asked by otto_brenner 19k · 17 months ago
27 votes 5 answers6.7k views
Is 15 mg in 2 mL of phosphate-buffered diluent a sensible presentation for orforglipron?

The particulars: 15 mg · 2 mL · phosphate-buffered diluent · orforglipron. I would like to define my thresholds before I have a result, for obvious reasons. I want a…

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 imani_dube 19k · 6 months ago
26 votes5 answers51k views
What is the arithmetic to convert 15 mg in 2.5 mL into units on a U-100 scale?

The particulars: 15 mg · 2.5 mL. I would like the arithmetic checked rather than the conclusion asserted. I have deliberately not used an online calculator because I…

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 · 23 months ago
26 votes5 answers47k views
How do I get 10 units out of a vial reconstituted to 4 mg/mL without guessing?

For reference: 10 units · 4 mg/mL. I have read the obvious sources and they disagree with each other, so I would rather ask people who have actually done this. I have…

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 ines_delacruz 16k · 2.3 years ago
26 votes5 answers45k views
What is the arithmetic to convert 30 mg in 2 mL into units on a U-100 scale?

What I have: 30 mg · 2 mL. This should be a straightforward calculation and I keep getting two different answers. The numbers are arbitrary; the method is what I am…

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 juan_esquivel 14k · 22 months ago
26 votes5 answers31k views
If I reconstitute a 60 mg vial with 2.5 mL of bacteriostatic water, what concentration do I end up with?

What I am working with: 60 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…

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 area_percent 13k · 16 months ago
26 votes5 answers28k views
What does TRIUMPH-3 report at the 2 mg dose level?

Conditions: TRIUMPH-3 · 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 tamsin_wray 13k · 15 months ago
26 votes 3 answers25k views
What does splitting a weekly dose actually cost in vial entries and compounded measurement error?

Most discussion of splitting a weekly dose treats the costs as vague — "more injections", "more chances for contamination". I would like the costs quantified, because…

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
sterility
sterility

Sterility as a test result rather than an adjective. Covers what a sterility test actually measures, why "sterile filtered" on a document is close…

122 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
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
asked by orla_sheridan 14k · 13 months ago
26 votes5 answers25k views
How do I convert the STEP 2 hazard ratio into an absolute risk reduction?

I have the full paper rather than the abstract, and the supplementary appendix. I would rather understand the derivation than memorise the outcome. Two people I asked…

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 teodora_ilic 15k · 14 months ago