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reconstitution

Page 10 of 14 · 313 questions tagged reconstitution.

313 questions · sorted by votes · page 10 of 14

12 votes5 answers23k views
If I reconstitute a 10 mg vial with 5 mL of 0.9% sodium chloride, what concentration do I end up with?

Concretely: 10 mg · 5 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 the precision…

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 dead_volume 56k · 16 months ago
12 votes 5 answers22k views
What is the case for and against 0.9% sodium chloride over eight weeks of withdrawals?

What I am working with: 0.9% sodium chloride · eight weeks. Both of these get recommended confidently by different people, which suggests neither is obviously right.…

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
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…

142 questions
shelf-life
shelf-life

How long a preparation remains within specification: labelled expiry for a sealed lyophilised vial, beyond-use dating after reconstitution, and…

327 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 bridget_nyathi 12k · 18 months ago
12 votes 5 answers22k views
How many units on a U-100 insulin syringe is a 2.5 mg dose at 4 mg/mL?

Numbers first: a U-100 insulin syringe · 2.5 mg · 4 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…

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 fib4_reader 24k · 2.3 years ago
12 votes 5 answers9.9k views
Is 10 mg in 0.5 mL of 0.9% sodium chloride a sensible presentation for a GLP-1 receptor agonist?

The case in front of me: 10 mg · 0.5 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…

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
asked by rania_haddad 13k · 4 months ago
12 votes1 answer8.7k views
If I reconstitute a 30 mg vial with 2 mL of sterile water for injection, what concentration do I end up with?

What I have: 30 mg · 2 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 this…

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 ben_akintola 10k · 8 months ago
12 votes 5 answers8.4k views
How many units on a low-dead-space syringe is a 20 mg dose at 20 mg/mL?

The specifics, since they change the answer: a low-dead-space syringe · 20 mg · 20 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…

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 ten_mg_vial 31k · 5 months ago
12 votes0 answers2.8k views
Is 4 mg/mL a sensible working concentration for oral semaglutide, or should I go lower?

The case in front of me: 4 mg/mL · oral semaglutide. I would like the axes of comparison first and the recommendation second. I have tried the first option and it…

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
oral-glp1
oral-glp1

Oral routes for GLP-1 receptor agonism: peptide formulations rescued by absorption enhancers such as SNAC, and true small molecules that need no…

219 questions
asked by birk_nordahl 16k · 7 months ago
11 votes5 answers22k views
If I reconstitute a 5 mg vial with 2 mL of bacteriostatic water, what concentration do I end up with?

Setup, so nobody has to ask: 5 mg · 2 mL · bacteriostatic water. I have worked this out and I would like someone to find the error, because I suspect there is one. My…

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 tri_gly_ala 24k · 2.2 years ago
11 votes 4 answers21k views
How many units on a U-40 insulin syringe is a 4 mg dose at 20 mg/mL?

What I am working with: a U-40 insulin syringe · 4 mg · 20 mg/mL. The units are where I keep going wrong, so please be explicit about them. I have sanity-checked 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 stopper_core 28k · 23 months ago
11 votes0 answers14k views
How many units on a low-dead-space syringe is a 2 mg dose at 6.67 mg/mL?

Concretely: a low-dead-space syringe · 2 mg · 6.67 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…

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 lucia_marchetti 19k · 22 months ago
11 votes 5 answers9.3k views
What is the arithmetic to convert 40 mg in 3 mL into units on a U-100 scale?

Concretely: 40 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, so I can apply…

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 fibre_or_fragment 13k · 5 months ago
11 votes 4 answers5.5k views
If I reconstitute a 50 mg vial with 5 mL of phosphate-buffered diluent, what concentration do I end up with?

For reference: 50 mg · 5 mL · phosphate-buffered diluent. I would rather understand the derivation than memorise the outcome. Two people I asked gave two answers that…

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 dermot_kiely 12k · 9 months ago
11 votes0 answers5k views
If I reconstitute a 40 mg vial with 2 mL of 0.9% sodium chloride, what concentration do I end up with?

The case in front of me: 40 mg · 2 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 teodora_ilic 17k · 8 months ago
11 votes0 answers4.9k views
How many units on a U-100 insulin syringe is a 2 mg dose at 8 mg/mL?

For reference: a U-100 insulin syringe · 2 mg · 8 mg/mL. I would rather understand the derivation than memorise the outcome. Two people I asked gave two answers that…

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 cal_hennessy 17k · 9 months ago
11 votes 5 answers4.3k views
Is 2.5 mg/mL a sensible working concentration for oral semaglutide, or should I go lower?

The case in front of me: 2.5 mg/mL · oral semaglutide. I would like the axes of comparison first and the recommendation second. I have tried the first option and it…

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
oral-glp1
oral-glp1

Oral routes for GLP-1 receptor agonism: peptide formulations rescued by absorption enhancers such as SNAC, and true small molecules that need no…

219 questions
asked by olu_babatunde 6.2k · 4 months ago
11 votes 5 answers3.4k views
Is 2.5 mg in 0.5 mL of 0.9% sodium chloride a sensible presentation for a GLP-1 receptor agonist?

Conditions: 2.5 mg · 0.5 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…

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
asked by colm_dunphy 8.2k · 4 months ago
11 votes0 answers3.1k views
What is the correct way to add diluent so it runs down the vial wall?

I keep a written log of every draw with date, volume and syringe type. I would like to understand the steps well enough to explain them to someone else. I have access…

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
injection-technique
injection-technique

Technique questions: angle, pinch versus flat, aspiration, injection speed, air bubbles, and the handling steps that determine whether you deliver…

96 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
asked by Dr_Nadia_Farsi 104k · 6 months ago
11 votes5 answers2.8k views
Should I be worried about a faint haze that does not settle?

I keep a written log of every draw with date, volume and syringe type. Before I write this off, I want to check whether it is a known failure mode. I have the lot…

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
peptide-stability
peptide-stability

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

908 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 gunnar_isaksen 14k · 31 days ago
11 votes 5 answers2.5k views
What is the arithmetic to convert 10 mg in 1.5 mL into units on a U-100 scale?

The case in front of me: 10 mg · 1.5 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 gradient_slope 46k · 44 days ago
10 votes5 answers10k views
How many units on a 1 mL luer-lock syringe is a 2 mg dose at 20 mg/mL?

Details up front: a 1 mL luer-lock syringe · 2 mg · 20 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…

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 nkem_obiora 39k · 13 months ago
10 votes 5 answers9.6k views
Is 2 mg in 0.5 mL of sterile water for injection a sensible presentation for semaglutide?

Numbers first: 2 mg · 0.5 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…

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
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 pieter_maas 14k · 12 months ago
10 votes 5 answers6.8k views
Is 10 mg in 1 mL of 0.9% sodium chloride a sensible presentation for a GLP-1 receptor agonist?

Concretely: 10 mg · 1 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. Assume…

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
asked by label_claim 30k · 9 months ago
10 votes5 answers6.4k views
If I reconstitute a 50 mg vial with 2 mL of phosphate-buffered diluent, what concentration do I end up with?

For reference: 50 mg · 2 mL · phosphate-buffered diluent. I would like the arithmetic checked rather than the conclusion asserted. I have deliberately not used an…

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 birk_nordahl 16k · 7 months ago
10 votes5 answers6.2k views
What is the arithmetic to convert 5 mg in 5 mL into units on a U-100 scale?

Stated plainly: 5 mg · 5 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
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 teodora_ilic 17k · 11 months ago