K.I.
Hi J.,
I give my son shots of human growth hormone every day and one day I thought I had given him a shot with air in it, so I called the pharmacy in a panic. I had a long discussion with the registered pharmacist and he told me the same thing. It is perfectly safe for a little air to get into an intramuscular injection. He said with IV meds going to the vein it can be dangerous but it would take a lot of air before anything bad would happen. Hope that makes you feel at ease. Take care!
~K.