Jeny, I took Cimzia for a year while it was in the clinical trial stages and have been on it again for about the last year. I haven't had any side effects since being on it this second time but I used to get injection site whelts and frequent upper respiratory infections while on it in the trial. But, I also had those same side effects with Humira. I've never had any flu like feelings. I also had to stop Remicade due to allergic reactions. Cimzia has kept my crohn's in remission but isn't helping as much as we hoped for the arthritis, so we are having to try to treat it with other meds.
Crohn's Disease, Acid Reflux/Gastritis, Hashimoto's Thyroiditis, Endometriosis, Arthritis, Depression/Anxiety. Too many meds to list them all. =)