Slow Slow Slow for me. Slow is the way to go. Also warm it up in your hand, get from room temp up to body temp=much more comfortable. Pending on what youre shooting you may or may not get pain. If you do then put it on a heating pad and massage 2z/day.
Dont forget to aspirate, you only need to pull back a little tiny bit to know if you are in a vein or not.
So here you go,
1. Wash your hands with soap and water.
2.Wipe area with alcohol, also wipe tops of vials.
3.Use a draw needle to draw from vial.
4.Switch needles from draw needle to inject needle, check for air bubble and tap syringe barrel if necessary.
5. Shoot a little tiny bit of substance from needle to get air out and lube needel.
6.Insert needle fast or slow up to you, I like slow, aspirate.
7. Inject substance
8. Quickly remove needle, pull straight out.
9.Lightly massage injection site.
Enjoy Bro!