Didn't sting at all, but nurse told me that 50% of time it does for some people. I seem to recall my fertility injections stinging more than the Humira did. Plus, it is easier to administer than my old fertility drugs. With those drugs, I actually had to mix medication and fill the syringe. Humira comes already filled in the syringe. It's pretty easy. Here's hoping that it does the trick....


