No, this is not a good plan at all. First, I'm not a big fan of mixing oil and water based drugs to beign with, but especailly with peptides, I would not go this route. It's easy to load up your gh into a 1/2 inch insulin pin, and stick it into a delt or tricep. Plus, it's a lot easier to measure with the smaller notches of the slin pin. No question, make this a seperate injection.