I just started Enbrel 2 weeks ago and have had 2 shots. With in 24 to 48 hours of taking the drug, I felt extreme, knock you off your feet fatigue. So bad that I could my doctor and he has stopped me on the Enbrel and is going to prescribe me Humira. I am concerned the Humira will be the same. It did help my pain, but I can't handle the fatigue. I am also on methotrexate, which doesn't help with fatigue. I don't know if I had a reaction to the drug or not.