Shane,

I take Humira every two weeks. I've been using Humira since May 2008, and it has quite simply changed my life. The headaches started a couple of years ago, and lasted for 3 - 4 days at near-migraine level of pain. Once I started taking the Tylenol, I no longer got the Humira-induced headaches. I hope Humira continues to be effective for me!