#reconstitution 2026-03-12

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

sanity check my maths before i pin myself with something stupid

round numbers

thats 5mg/ml

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

weigh it first

is it normal for the cake to look slightly collapsed on one side

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

coming back to this do i swirl for a specific length of time or just until its clear

unrelated but is it worth buying a 3ml syringe for the diluent or is the insulin one fine
aim the diluent at the glass wall, not at the powder. it goes in gentler

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

is the meniscus reading actually a real source of error or am i overthinking

swirl dont shake

not sterile water

too dilute imo

the powder is stuck to the stopper, do i care

what do you do with the last 15 units when you cant draw them cleanly

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

clear or bin it

yep 10 units

the last few units are a real loss. i accept it rather than tilting the vial and drawing air, ask me again in a month

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

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

while im here it should be completely clear with no floaters. cloudy means stop, still working it out

thats fine

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