I have had asthma for 6 years now. I got diagnosed while pregnant and it has never really been under control and has required lots of steroids. This January I started the shot Xolair. I have received 4 shots and I am just realizing the dizziness and back aches are the side effects of the Xolair. Does anyone else take Xolair for their asthma? What side effects have you had and how long did they last? I was so bad I would wake up in the middle of the night to use my Nebulizer machine.