I have a pal-40+ years flying, and he fairly swooooooons as the needle approaches. Funny the meds should think this odd.
DON'T READ THIS IF YOU'RE SQUEAMISH
I past colleague had a recurring inflammation of the eye. He had to sit in a chair while a nurse approached with the cortisone loaded needle. Yep, right into the middle of the eye.
He said to her, "I don't know if I'm going to be able to let you do this." But it seems he must have plucked up courage.