i keep a spare vial of bac water in the fridge purely so i never rush the maths
#reconstitution 2025-12-02
Tuesday37 messages6 participantstimes are UTC
Highlights from this day
- identity_shift — label the date too. you will not remember which vial is which by week 4 dead space in a standard insulin syringe hub is small but it is not nothing over a month 19:37
- chain_of_custody — do not add more bac water to an already reconstituted vial, you have lost track of the concentration 19:52
- chain_of_custody — 20mg in 2ml is 10mg/ml. 1mg is 10 units, 2mg is 20 units, easy, we shall see 20:05
- mhra_unlicensed — one unit is 0.01ml. 100 units is 1ml. everything else in this channel follows from that, for what its worth 20:29
- lyophile_liv — update from 11 months ago: switched to a single concentration and have not miscalculated since 21:05
label the vial
weigh it first
if i add 0.5ml to a 30mg vial what concentration am i actually at
clear or bin it
it foamed. is it ruined
i swirl for about thirty seconds and then leave it. never had one fail to dissolve
*VendorInvestigate not the other one
the jewellery scale is a good habit but calibrate it, they drift badly
coming back after 7 months, has the pinned recon volume advice changed
do you draw up with the same pin you inject with
label the date too. you will not remember which vial is which by week 4
dead space in a standard insulin syringe hub is small but it is not nothing over a month
bac water
i was wrong about this last year: it is fine to draw cold, it just stings more going in
benzyl alcohol is what makes it bacteriostatic. it is about 0.9% typically
do not add more bac water to an already reconstituted vial, you have lost track of the concentration
swirl it. do not shake it. the foam is denatured protein and you are not getting it back
pick the volume so your dose is a whole number of units. thats the entire trick
read it at eye level
how much do i lose to dead space with a 31G pin
is a slightly cloudy solution ever ok or is that always a bin it
a slightly collapsed cake is cosmetic. a puddle in the bottom is not
20mg in 2ml is 10mg/ml. 1mg is 10 units, 2mg is 20 units, easy, we shall see
weights-monthly.csv
166 rows · not retained in the public archive
nope, redo it
do i swirl for a specific length of time or just until its clear
one unit is 0.01ml. 100 units is 1ml. everything else in this channel follows from that, for what its worth
is there any reason not to just always use 2ml
thats fine
one unit is 0.01ml
update from 11 months ago: switched to a single concentration and have not miscalculated since
10mg in 1ml is 10mg/ml, so 2.5mg is 25 units. thats the one i use
you can absolutely just always use 2ml, and honestly most of us should, from memory
im getting bubbles in the barrel every single time, what am i doing wrong
my vial pulled the water in on its own, is that the vacuum or did i do something
ok so is it normal for the cake to look slightly collapsed on one side
weighing the vial before you reconstitute is the only way to catch an underfill
bac water or sterile water for something im going into weekly for 7 weeks