vialroom

#reconstitution 2025-12-08

Monday23 messages5 participantstimes are UTC
Highlights from this day
  • eat_more_please — slightly off topic but bacteriostatic water for anything multi-use. sterile water has no preservative in it at all 07:50
  • eat_more_please — 10mg in 1ml is 10mg/ml, so 2.5mg is 25 units. thats the one i use benzyl alcohol is what makes it bacteriostatic. it is about 0.9% typically 07:57
  • seven_five_sweet — if you cannot read the mark confidently, your volume is too small. redo it at a lower concentration 09:40
EM

slightly off topic but bacteriostatic water for anything multi-use. sterile water has no preservative in it at all

janoshik-h-2814.pdf
2 pages · 421 KB · not retained in the public archive

weighing the vial before you reconstitute is the only way to catch an underfill

the vacuum will pull it in. let it. fighting it is how you get a face full of aerosol

genuine question i write the mg/ml on the vial with a sharpie the moment i reconstitute it

10mg in 1ml is 10mg/ml, so 2.5mg is 25 units. thats the one i use
benzyl alcohol is what makes it bacteriostatic. it is about 0.9% typically

*2ml not 2.5

thats the vacuum

EM

i swirl for about thirty seconds and then leave it. never had one fail to dissolve

BS

whats the smallest volume you would trust yourself to measure on a u100

EM

the last few units are a real loss. i accept it rather than tilting the vial and drawing air

BS

dead space in a standard insulin syringe hub is small but it is not nothing over a month

do you let it come to room temp before drawing or draw it cold

what do you do with the last 12 units when you cant draw them cleanly

if you cannot read the mark confidently, your volume is too small. redo it at a lower concentration

EM

i was wrong about this last year: it is fine to draw cold, it just stings more going in

thats 5mg/ml