Hello i just got my order of hcg in......they came in ampules. Now i have never used them before? There is 1 ampule with this powder stuff in the bottum and another ampule of water it looks like. The question i have is each amp is 5000iu and i am only going to use 2500iu so do i draw the whole med into the needle use half? Then when i inject again change the tip, and then just inject other half ? Also i have googled on how to inject and stuff, it shows people using a filter to prevent glass from getting in do you need this or ? Thanks alot guys.