I have been taking Vicodin for a few years. I taper myself off when not needed. I recently was diagnosed with firbromyalgia & rheumatoid arthritis. I haven't started a biologic yet. While on a followup visit my doctor found a spot on my chest wall and I had a cat scan. It is a Anterior Meditastinal Tumor. I take Vicodin for a lower back pain from a back surgery in 2012. I am always in pain, fatigued and feel crappy to say the least. But lately taking even a half of a Vicodin I get sick. I only take the Vicodin when my pain is high. Any ideas?