Administration of the compound is either by intra-muscular or subcutaneous injection. It comes as a powder which needs to be mixed with the sterile water. The powder is temperature-sensitive prior to mixing and should not be exposed to direct heat. After mixing, it should be kept refrigerated and used within a few weeks - though there are sterility issues which need to be considered after mixing.
ORIGINAL: Bigfella As stated above, you can do it either way, I personally prefer IM mixed with my regular shots. Bigfella.