label the vial
#reconstitution 2025-02-15
Saturday42 messages11 participantstimes are UTC
Highlights from this day
- orfor_watch — give it 6 minutes at room temperature before you decide it has not dissolved 22:51
- orfor_watch — pick the volume so your dose is a whole number of units. thats the entire trick 22:53
- taper_tess — if the maths gives you 13.7 units, change the volume. do not try to hit 13.7 23:00
- related_subs — how long after reconstituting before its actually dissolved 23:02
- lipase_lore — temperature of the diluent does not matter. how fast you push it in does 23:17
one unit is 0.01ml. 100 units is 1ml. everything else in this channel follows from that
i write the mg/ml on the vial with a sharpie the moment i reconstitute it
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benzyl alcohol is what makes it bacteriostatic. it is about 0.9% typically
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weighing the vial before you reconstitute is the only way to catch an underfill
[edited]i keep a spare vial of bac water in the fridge purely so i never rush the maths
Batch lookup B-0329: 5 independent reports on file, earliest 2024-10-23.
5mg in 2ml gives 2.5mg/ml, 0.25mg is 10 units. good for a starting dose
update on the earlier thing do not add more bac water to an already reconstituted vial, you have lost track of the concentration, i have it written down somewhere
the meniscus thing is real. read it at eye level or you are guessing by a unit either way
i swirl for about thirty seconds and then leave it. never had one fail to dissolve
give it 3 minutes at room temperature before you decide it has not dissolved
i was wrong about this last year: it is fine to draw cold, it just stings more going in, someone check my working
give it 6 minutes at room temperature before you decide it has not dissolved
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pick the volume so your dose is a whole number of units. thats the entire trick
10mg vial
+ 1.0ml -> 10.0 mg/ml 0.5mg = 5u 1mg = 10u
+ 2.0ml -> 5.0 mg/ml 0.5mg = 10u 1mg = 20u
+ 2.5ml -> 4.0 mg/ml 0.5mg = 12.5u (dont)
+ 5.0ml -> 2.0 mg/ml 0.5mg = 25u 1mg = 50u✅16📈5
bacteriostatic water for anything multi-use. sterile water has no preservative in it at all
my rule is one concentration for everything so i never have to think about it at 7am
if the powder is on the stopper, tap it down before you add anything. it will still dissolve either way
if the maths gives you 13.7 units, change the volume. do not try to hit 13.7
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how long after reconstituting before its actually dissolved
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one unit is 0.01ml
20mg in 2ml is 10mg/ml. 1mg is 10 units, 2mg is 20 units, easy
read it at eye level
nobody here should be telling you a dose. we can check your arithmetic, thats a different thing
a 3ml syringe for the diluent and a u100 for the dose is the setup most people here end up with, i think
*VendorInvestigate not the other one
the powder is stuck to the stopper, do i care
temperature of the diluent does not matter. how fast you push it in does
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bac water
sorry to jump in dead space in a standard insulin syringe hub is small but it is not nothing over a month
thats the vacuum
quick one does it matter if i inject the bac water straight at the powder
[edited]thats 5mg/ml
quick one the last few units are a real loss. i accept it rather than tilting the vial and drawing air
not sterile water
clear or bin it
label the date too. you will not remember which vial is which by week 30
foam is bad
weigh it first
10mg in 1ml is 10mg/ml, so 2.5mg is 25 units. thats the one i use
how much do i lose to dead space with a 29G pin