
Originally Posted by
SMAN12B
You need to add air in the amount you are going to drw to create pressure to make easier to draw. If you just try to draw from a pressureized sterile vial, the negative pressure will suck your plunger back into the syringe and make it very difficult to draw.
If you are going to draw 1ml of compound, the prior to inserting the needle, pull plunger back to 1 ml insert into vial AFTER you wipe the top with alcohol, and push the 1ml of air into the vial then you can draw your compound
Hope this helps