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reconstitution

Page 13 of 14 · 330 questions tagged reconstitution.

330 questions · sorted by votes · page 13 of 14

6 votes5 answers6k views
My lyophilised cake dissolved instantly — is that a bad sign?

For context, I am working with a 10 mg presentation and a 2 mL fill. I noticed this today and I have not touched anything since, in case the state is diagnostic. 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
lyophilisation
lyophilisation

Freeze-drying: primary and secondary drying, collapse temperature, the role of bulking agents and cryoprotectants such as mannitol and trehalose,…

17 questions
vial-inspection
vial-inspection

What you can learn by looking: cake morphology, meniscus films, fibres versus stopper fragments versus true particulates, clarity after…

66 questions
asked by n_takahashi 36k · 2 months ago
6 votes 3 answers5.5k views
Is 2.5 mg in 5 mL of 0.9% sodium chloride a sensible presentation for a GLP-1 receptor agonist?

Concretely: 2.5 mg · 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 klara_novotna 16k · 8 months ago
6 votes3 answers4.9k views
Is 30 mg in 0.5 mL of sterile water for injection a sensible presentation for ecnoglutide?

Details up front: 30 mg · 0.5 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…

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 orla_ferriter 47k · 6 months ago
6 votes3 answers4.4k views
What is the arithmetic to convert 60 mg in 2.5 mL into units on a U-100 scale?

Setup, so nobody has to ask: 60 mg · 2.5 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…

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 bounty_hunter_q 18k · 3 months ago
6 votes0 answers3.9k views
Is 6.67 mg/mL a sensible working concentration for tirzepatide, or should I go lower?

The case in front of me: 6.67 mg/mL · tirzepatide. These are treated as interchangeable and I do not think they are. If both are acceptable I would like to know that,…

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 orla_ferriter 47k · 12 months ago
6 votes0 answers1.3k views
Does reconstituting semaglutide with sterile water for injection change anything I should know about?

The case in front of me: semaglutide · sterile water for injection. This is one of those things that everyone repeats and nobody derives. This matters practically,…

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
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;…

112 questions
peptide-stability
peptide-stability

The chemistry of peptide degradation: deamidation, oxidation, hydrolysis, aggregation and fibrillation, and how temperature, pH, ionic strength,…

832 questions
asked by eoin_mcgarry 16k · 2 months ago
5 votes5 answers23k views
Is 60 mg in 1 mL of bacteriostatic water a sensible presentation for tirzepatide?

Setup, so nobody has to ask: 60 mg · 1 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 fill_volume 13k · 2.4 years ago
5 votes 5 answers16k views
How many units on a low-dead-space syringe is a 2 mg dose at 1 mg/mL?

The case in front of me: a low-dead-space 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 tadhg_o_riordan 14k · 17 months ago
5 votes 4 answers14k views
What is the arithmetic to convert 20 mg in 3 mL into units on a U-100 scale?

Stated plainly: 20 mg · 3 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…

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 zeynep_arslan 20k · 18 months ago
5 votes5 answers12k views
Is 2.5 mg in 0.5 mL of 0.9% sodium chloride a sensible presentation for cagrilintide?

Concretely: 2.5 mg · 0.5 mL · 0.9% sodium chloride · cagrilintide. The failure mode I am trying to avoid is making this decision emotionally. I have twelve months in…

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 rukhsana_iqbal 14k · 17 months ago
5 votes5 answers11k views
Is 3.33 mg/mL a sensible working concentration for dulaglutide, or should I go lower?

Details up front: 3.33 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…

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 syringe_ninety 15k · 8 months ago
5 votes 5 answers11k views
Is 2 mg/mL a sensible working concentration for survodutide, or should I go lower?

The particulars: 2 mg/mL · survodutide. 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…

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 shear_at_the_front 15k · 10 months ago
5 votes3 answers8.2k views
Is 2 mg/mL a sensible working concentration for ecnoglutide, or should I go lower?

The particulars: 2 mg/mL · ecnoglutide. I am trying to choose between two options that are usually discussed as though only one exists. I am not optimising for price,…

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 meniscus_film 34k · 8 months ago
5 votes5 answers7.9k views
Is 5 mg in 0.5 mL of bacteriostatic water a sensible presentation for tirzepatide?

Stated plainly: 5 mg · 0.5 mL · bacteriostatic water · tirzepatide. I am trying to build something sustainable rather than something thorough that I will abandon. 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 syringe_ninety 15k · 2.0 years ago
5 votes 4 answers6.9k views
What is the arithmetic to convert 20 mg in 2.5 mL into units on a U-100 scale?

What I am working with: 20 mg · 2.5 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 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 tess_amankwah 48k · 17 months ago
5 votes 5 answers6.1k views
Is 5 mg in 1 mL of bacteriostatic water a sensible presentation for tirzepatide?

Stated plainly: 5 mg · 1 mL · bacteriostatic water · tirzepatide. I am trying to build something sustainable rather than something thorough that I will abandon. 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 low_dead_space 42k · 17 months ago
5 votes5 answers5.6k views
If I reconstitute a 5 mg vial with 5 mL of bacteriostatic water, what concentration do I end up with?

Setup, so nobody has to ask: 5 mg · 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 helena_vidmar 18k · 15 months ago
5 votes 5 answers4.2k views
Does reconstituting oral semaglutide with bacteriostatic water change anything I should know about?

The particulars: oral semaglutide · bacteriostatic water. I would like the mechanism, because I want to be able to reason about the cases nobody has written about. 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
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;…

112 questions
peptide-stability
peptide-stability

The chemistry of peptide degradation: deamidation, oxidation, hydrolysis, aggregation and fibrillation, and how temperature, pH, ionic strength,…

832 questions
asked by micron22 36k · 13 days ago
5 votes5 answers2.8k views
How many units on a 0.5 mL insulin syringe is a 15 mg dose at 10 mg/mL?

What I am working with: a 0.5 mL insulin syringe · 15 mg · 10 mg/mL. I have worked this out and I would like someone to find the error, because I suspect there 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
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 wren_calloway 14k · 5 months ago
5 votes0 answers1.1k views
How many units on a U-100 insulin syringe is a 40 mg dose at 3.33 mg/mL?

Numbers first: a U-100 insulin syringe · 40 mg · 3.33 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 forty_units 14k · 43 days ago
4 votes 5 answers18k views
What is the arithmetic to convert 8 mg in 3 mL into units on a U-100 scale?

Numbers first: 8 mg · 3 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 swab_stopper 16k · 22 months ago
4 votes 4 answers18k views
How many units on a 1 mL luer-lock syringe is a 5 mg dose at 2 mg/mL?

The specifics, since they change the answer: a 1 mL luer-lock syringe · 5 mg · 2 mg/mL. 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 kofi_mensah 12k · 22 months ago
4 votes5 answers12k views
How many units on a low-dead-space syringe is a 15 mg dose at 4 mg/mL?

Stated plainly: a low-dead-space syringe · 15 mg · 4 mg/mL. The units are where I keep going wrong, so please be explicit about them. I have sanity-checked the order…

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 mala_venkatesh 21k · 11 months ago
4 votes 5 answers6.3k views
How many units on a 1 mL luer-lock syringe is a 2.5 mg dose at 8 mg/mL?

What I have: a 1 mL luer-lock syringe · 2.5 mg · 8 mg/mL. I can do the algebra. I am not confident about the conversion factors. If there is a standard way to lay…

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 Dr_Jonas_Halvorsen 41k · 20 months ago