Thanks for the replies! I had it done earlier today. There was minimal discomfort. I'm pretty sore right now, at the injection sites. And right after, I had a series of pretty strong shooting pains down my left leg. The doctor told me to expect the relief to come in 3-5 days. So, I'll just wait. By the way, he gave 18 Vicodin ES, which I have not filled yet. Can anyone tell me how much APAP is in that? I'm thinking it's 750mg.