You can, but I don't recommend it and this is why. Dose of hCG is very individual and is important to both experiencing the least hunger and best weight loss - if you pre-load your needles you will not be able to effectively adjust your dose of hCG as necessary - both at the start when you may not be sure what your best dose is just yet, and then once you find it, it's common to need to reduce your dose as you get thinner - so I prefer to leave the hCG in the bottle and draw up the hCG each on the protocol so I can have control over how much I'm injecting and have that ability to adjust as needed.
Intramuscular Injections are a more evasive form of injection vs subcutaneous injections. Intramuscular Injections are meant to inject the compound directly into the muscle tissue, which typically requires a longer, larger gauge needles. The needles can range between 28 gauge and larger. However, Rejuvi Medical uses 1- inch, 23-25 gauge needles, which most mclients claim they cannot feel when administered into the glutes (the bum). While intramuscular needles may seem scary for some, the actual shot with such small gauge needles usually has almost no irritation or pain.