pick the volume so your dose is a whole number of units. thats the entire trick
#reconstitution 2025-11-30
Sunday38 messages10 participantstimes are UTC
Highlights from this day
- relabel_watch — do you draw up with the same pin you inject with 11:52
- third_shift — anyone got a photo of what a properly dissolved vial looks like 12:33
- relabel_watch — do not add more bac water to an already reconstituted vial, you have lost track of the concentration 13:53
- non_scale_win — benzyl alcohol is what makes it bacteriostatic. it is about 0.9% typically 16:20
round numbers
a slightly collapsed cake is cosmetic. a puddle in the bottom is not
nobody here should be telling you a dose. we can check your arithmetic, thats a different thing, i have it written down somewhere
[edited]do you draw up with the same pin you inject with
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swirl it. do not shake it. the foam is denatured protein and you are not getting it back
how long after reconstituting before its actually dissolved
i swirl for about thirty seconds and then leave it. never had one fail to dissolve
check your maths
thats the vacuum
for the archive gross powder mass is not net peptide. water and counterion are in that number
anyone got a photo of what a properly dissolved vial looks like
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follow up 15mg in 3ml is 5mg/ml. same numbers as 10 in 2, just more of it, ill dig out the number
bac water
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Archive lookup: half_life_hal first appears in this channel on 2025-02-26.
is it worth buying a 3ml syringe for the diluent or is the insulin one fine
do not add more bac water to an already reconstituted vial, you have lost track of the concentration
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label the vial
my rule is one concentration for everything so i never have to think about it at 7am
it should be completely clear with no floaters. cloudy means stop
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read it at eye level
follow up is it normal for the cake to look slightly collapsed on one side
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my vial pulled the water in on its own, is that the vacuum or did i do something
thats 5mg/ml
is a slightly cloudy solution ever ok or is that always a bin it
30mg in 3ml is 10mg/ml, so 5mg is 50 units. half the barrel, feels like a lot but its right
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update on the earlier thing 5mg in 2ml gives 2.5mg/ml, 0.25mg is 10 units. good for a starting dose, your mileage will differ
quick one the last few units are a real loss. i accept it rather than tilting the vial and drawing air
20mg in 2ml is 10mg/ml. 1mg is 10 units, 2mg is 20 units, easy
what do you do with the last 15 units when you cant draw them cleanly
is the meniscus reading actually a real source of error or am i overthinking
one unit is 0.01ml
i keep a spare vial of bac water in the fridge purely so i never rush the maths
label the date too. you will not remember which vial is which by week 12
clear or bin it
my 10mg vial weighed 11.4g on the jewellery scale, is that wrong
benzyl alcohol is what makes it bacteriostatic. it is about 0.9% typically
U-100 syringe: 1 unit = 0.01 ml
10u = 0.10 ml
25u = 0.25 ml
50u = 0.50 ml
100u = 1.00 ml
mg drawn = ml drawn x mg/mli use bac water even for a single-use vial because it stings less, which is not the reason it exists
foam is bad