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reconstitution

Page 6 of 14 · 330 questions tagged reconstitution.

330 questions · sorted by votes · page 6 of 14

22 votes 5 answers18k views
Is there any reason to warm a vial to speed dissolution?

My setup is a refrigerator with a logger and a small work area I wipe down, nothing more. The empirical answer seems settled. The explanation does not. If the honest…

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
peptide-stability
peptide-stability

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

832 questions
storage
storage

Storage conditions and their evidence base: minus twenty degrees for powder, refrigerated for solution, protection from light, and what the…

646 questions
asked by swab_and_wait 15k · 12 months ago
22 votes 4 answers18k views
What is the 0.9 % benzyl alcohol in bacteriostatic water actually doing in a multi-use vial?

I have been reconstituting research-use lyophilised GLP-1 analogues with Bacteriostatic Water for Injection because that is what every protocol sheet says to use, and…

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
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…

14 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
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
asked by oona_kekkonen 16k · 23 months ago
22 votes 5 answers16k views
What is the arithmetic to convert 30 mg in 2.5 mL into units on a U-100 scale?

Details up front: 30 mg · 2.5 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…

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_Priya_Raghunathan 94k · 7 months ago
22 votes5 answers15k views
Is 50 mg in 2 mL of phosphate-buffered diluent a sensible presentation for retatrutide?

The specifics, since they change the answer: 50 mg · 2 mL · phosphate-buffered diluent · retatrutide. I am at the decision point and I would rather think it through…

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
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…

14 questions
asked by bea_castellanos 47k · 7 months ago
22 votes 5 answers13k views
Is 6.67 mg/mL a sensible working concentration for liraglutide, or should I go lower?

The case in front of me: 6.67 mg/mL · liraglutide. 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 mateo_iglesias 16k · 12 months ago
22 votes 5 answers13k views
Is 40 mg in 1 mL of 0.9% sodium chloride a sensible presentation for mazdutide?

Concretely: 40 mg · 1 mL · 0.9% sodium chloride · mazdutide. I want to decide this in advance so that I am not deciding it under pressure later. Assume I will follow…

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 tare_and_weigh 18k · 10 months ago
22 votes5 answers13k views
If I reconstitute a 40 mg vial with 1 mL of 0.9% sodium chloride, what concentration do I end up with?

Concretely: 40 mg · 1 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,…

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 Dr_Yusuf_Adeyemi 95k · 6 months ago
22 votes 1 answer12k views
What is the arithmetic to convert 50 mg in 2 mL into units on a U-100 scale?

The particulars: 50 mg · 2 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 day_seven_trough 11k · 7 months ago
22 votes0 answers9.7k views
If I reconstitute a 5 mg vial with 0.5 mL of bacteriostatic water, what concentration do I end up with?

What I am working with: 5 mg · 0.5 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 day_seven_trough 11k · 6 months ago
22 votes5 answers8.6k views
Is 4 mg/mL a sensible working concentration for cagrilintide, or should I go lower?

Stated plainly: 4 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 either option…

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 ten_mg_vial 16k · 12 months ago
22 votes 3 answers3.1k views
What is the arithmetic to convert 2 mg in 2 mL into units on a U-100 scale?

Details up front: 2 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…

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 amara_nwachukwu 41k · 43 days ago
22 votes 5 answers2.8k views
Is 8 mg in 0.5 mL of sterile water for injection a sensible presentation for ecnoglutide?

Details up front: 8 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 them.…

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 swab_stopper 16k · 27 days ago
21 votes 5 answers31k views
Is 2 mg in 2 mL of sterile water for injection a sensible presentation for ecnoglutide?

Details up front: 2 mg · 2 mL · sterile water for injection · ecnoglutide. I would rather over-plan the first cycle and simplify later. I am prepared to do the 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…

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
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…

14 questions
asked by coldbox9 13k · 20 months ago
21 votes 3 answers28k views
Floaters, fibres, stopper fragments and foam — how do I tell them apart in a reconstituted vial?

Reconstituted a vial yesterday and now there is stuff in it. I would like a systematic way to classify "stuff", because right now my options are ignore it or bin a…

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
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
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
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 kofi_mensah 12k · 14 months ago
21 votes5 answers21k views
If I reconstitute a 10 mg vial with 2 mL of 0.9% sodium chloride, what concentration do I end up with?

The case in front of me: 10 mg · 2 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…

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 thermal_mass 16k · 14 months ago
21 votes 2 answers14k views
How many units on a 0.5 mL insulin syringe is a 50 mg dose at 6.67 mg/mL?

What I am working with: a 0.5 mL insulin syringe · 50 mg · 6.67 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 colm_dunphy 16k · 6 months ago
21 votes 5 answers13k views
Is 5 mg in 2.5 mL of bacteriostatic water a sensible presentation for liraglutide?

Stated plainly: 5 mg · 2.5 mL · bacteriostatic water · liraglutide. I would like to set this up properly once, rather than adjust it repeatedly. My budget is real but…

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 rosa_mendieta 13k · 8 months ago
21 votes5 answers13k views
Is 30 mg in 5 mL of sterile water for injection a sensible presentation for semaglutide?

Numbers first: 30 mg · 5 mL · sterile water for injection · semaglutide. This is a planning question. I know what my options are; I do not know how to weigh them.…

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 a_lindgren 46k · 6 months ago
21 votes 3 answers11k views
What is the arithmetic to convert 2.5 mg in 5 mL into units on a U-100 scale?

The case in front of me: 2.5 mg · 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…

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 lukas_sedlacek 17k · 6 months ago
21 votes 2 answers11k views
Is 60 mg in 2.5 mL of bacteriostatic water a sensible presentation for liraglutide?

Stated plainly: 60 mg · 2.5 mL · bacteriostatic water · liraglutide. 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 kirsi_lahtinen 45k · 4 months ago
21 votes 5 answers10k views
Is 60 mg in 0.5 mL of bacteriostatic water a sensible presentation for oral semaglutide?

Setup, so nobody has to ask: 60 mg · 0.5 mL · bacteriostatic water · oral semaglutide. I am trying to build something sustainable rather than something thorough 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 dermot_kiely 14k · 9 months ago
21 votes 5 answers9.5k views
Is 2.5 mg in 2 mL of 0.9% sodium chloride a sensible presentation for cagrilintide?

Concretely: 2.5 mg · 2 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 coring_risk 17k · 13 months ago
21 votes0 answers8.7k views
How many units on a U-100 insulin syringe is a 60 mg dose at 2 mg/mL?

The specifics, since they change the answer: a U-100 insulin syringe · 60 mg · 2 mg/mL. I would rather understand the derivation than memorise the outcome. Two people…

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 e_dziedzic 87k · 15 months ago
21 votes0 answers5k views
Is 20 mg in 1 mL of bacteriostatic water a sensible presentation for oral semaglutide?

Setup, so nobody has to ask: 20 mg · 1 mL · bacteriostatic water · oral semaglutide. I am trying to build something sustainable rather than something thorough that 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 kelvin_lam 11k · 2 months ago