i keep a spare vial of bac water in the fridge purely so i never rush the maths
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#reconstitution 2025-04-11
Friday43 messages9 participantstimes are UTC
Highlights from this day
- karl_fischer — i have never once regretted using a rounder number and a slightly bigger volume 22:07
- VialBot — Assay note: BCH lot F-1330 reported at 98.6% of label content. 22:31
- septum_sal — dead space in a standard insulin syringe hub is small but it is not nothing over a month 22:53
- vienna_vial — 30mg in 3ml is 10mg/ml, so 5mg is 50 units. half the barrel, feels like a lot but its right, happy to be corrected 22:55
update from 15 months ago: switched to a single concentration and have not miscalculated since
if you cannot read the mark confidently, your volume is too small. redo it at a lower concentration
temperature of the diluent does not matter. how fast you push it in does
i have never once regretted using a rounder number and a slightly bigger volume
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write the date on
fridge-temps.csv
880 rows · not retained in the public archive
a 3ml syringe for the diluent and a u100 for the dose is the setup most people here end up with
follow up anyone worked out a recon volume that puts 2.4mg on a round unit mark
20mg in 2ml is 10mg/ml. 1mg is 10 units, 2mg is 20 units, easy
if the powder is on the stopper, tap it down before you add anything. it will still dissolve either way
pick the volume so your dose is a whole number of units. thats the entire trick
is it worth buying a 3ml syringe for the diluent or is the insulin one fine
do you let it come to room temp before drawing or draw it cold
whats the smallest volume you would trust yourself to measure on a u100
lyophilised powder is far more robust than people think. it is the solution that is fragile
bac water
Assay note: BCH lot F-1330 reported at 98.6% of label content.
it foamed. is it ruined
one unit is 0.01ml
one unit is 0.01ml. 100 units is 1ml. everything else in this channel follows from that, we shall see
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 11
my rule is one concentration for everything so i never have to think about it at 7am
weigh it first
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how do you all measure a half unit, or do you just not
quick one does benzyl alcohol matter if im finishing the vial in one go
dead space in a standard insulin syringe hub is small but it is not nothing over a month
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30mg in 3ml is 10mg/ml, so 5mg is 50 units. half the barrel, feels like a lot but its right, happy to be corrected
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15mg in 3ml is 5mg/ml. same numbers as 10 in 2, just more of it
it should be completely clear with no floaters. cloudy means stop
bac water or sterile water for something im going into weekly for 9 weeks
thats fine
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anyone else find the 20mg vials harder to get fully dissolved than the small ones
im getting bubbles in the barrel every single time, what am i doing wrong
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5mg in 2ml gives 2.5mg/ml, 0.25mg is 10 units. good for a starting dose, i have it written down somewhere
how long after reconstituting before its actually dissolved
weighing the vial before you reconstitute is the only way to catch an underfill
sanity check my maths before i pin myself with something stupid
coming back after 6 months, has the pinned recon volume advice changed
my 10mg vial weighed 11.4g on the jewellery scale, is that wrong
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check your maths
unrelated but the jewellery scale is a good habit but calibrate it, they drift badly
nobody here should be telling you a dose. we can check your arithmetic, thats a different thing