#reconstitution 2026-04-25

nobody here should be telling you a dose. we can check your arithmetic, thats a different thing

one unit is 0.01ml

Assay note: KP lot E-2205 reported at 96.8% of label content.

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

label the date too. you will not remember which vial is which by week 29

if the powder is on the stopper, tap it down before you add anything. it will still dissolve either way

took me a year to stop over-diluting. the measurement error at 4 units is worse than the convenience

bacteriostatic water for anything multi-use. sterile water has no preservative in it at all, we shall see

yep 10 units

coming back after 10 months, has the pinned recon volume advice changed

bac water or sterile water for something im going into weekly for 4 weeks

i use bac water even for a single-use vial because it stings less, which is not the reason it exists

10mg in 2ml is 5mg/ml. so 0.5mg is 0.1ml which is 10 units on a u100

pick the volume so your dose is a whole number of units. thats the entire trick, n of 1 obviously

the jewellery scale is a good habit but calibrate it, they drift badly

it foamed. is it ruined

thats fine

the meniscus thing is real. read it at eye level or you are guessing by a unit either way

benzyl alcohol is what makes it bacteriostatic. it is about 0.9% typically
5mg in 2ml gives 2.5mg/ml, 0.25mg is 10 units. good for a starting dose

for the archive what do you do with the last 10 units when you cant draw them cleanly

does benzyl alcohol matter if im finishing the vial in one go

anyone got a photo of what a properly dissolved vial looks like

bac water

if you draw up with a bigger pin and inject with a fresh one you lose a bit more to dead space

weigh it first

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

while im here 20mg in 2ml is 10mg/ml. 1mg is 10 units, 2mg is 20 units, easy

you can absolutely just always use 2ml, and honestly most of us should

does temperature of the bac water matter at all

my vial pulled the water in on its own, is that the vacuum or did i do something

right so the vacuum will pull it in. let it. fighting it is how you get a face full of aerosol, your mileage will differ

sanity check my maths before i pin myself with something stupid

write the date on

the powder is stuck to the stopper, do i care

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

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

is it worth buying a 3ml syringe for the diluent or is the insulin one fine

foam is bad

nope, redo it

lyophilised powder is far more robust than people think. it is the solution that is fragile

gross powder mass is not net peptide. water and counterion are in that number

is a slightly cloudy solution ever ok or is that always a bin it

for the archive temperature of the diluent does not matter. how fast you push it in does

15mg in 3ml is 5mg/ml. same numbers as 10 in 2, just more of it

can i add more bac water later to a vial ive already reconstituted

too dilute imo

do you draw up with the same pin you inject with

swirl dont shake

if the maths gives you 13.7 units, change the volume. do not try to hit 13.7

while im here i was wrong about this last year: it is fine to draw cold, it just stings more going in, happy to be corrected

genuine question clear or bin it

my 10mg vial weighed 11.4g on the jewellery scale, is that wrong

dead space