There were no side effects and it didn't hurt at all. I think it hurt more than when I got the shot last week. I think it's because I was so nervous when I got it the first time . I missed it, but I think I'm seeing the effects of the first shot last week. That's why I got the shot today and will get it next week. Don't you see it? I want Botox on my calves, the numbness has disappeared, but the effect isn't great. My friend said he has become thinner, but it's not dramatic . I'll try 200 more units in 3-4 months ...