Any intramusclular injections with Synth will work just fine. I found I could push it thru a 27g needle with no problem so there is no need for a big(thick) needle. Check out spotinjections.com for some tips
you can inject it anywhere and there is no need for anything more than an insulin needle as this is a water based product I believe. You learn through trile by era. Sometimes you just have to suck it up and do it, I know I had to.