systemic lupus erythematosus
"At the 2 wk mark of taking imuran, I started having a terrible headache. My body started to ache. I couldn't get comfortable not matter what I did and I had trouble sleeping. I had a fever, I had chills and I sweated worse than being at the gym.  My urine was golden dark yellow and my skin was pale.  I was tested for the flu which was negative and my blood test results were normal (as normal as can b for a lupus patient). My dr thought I had a virus but told me to stop taking the imuran. Within a little over 24 hours, the headache started going away, the urine went back to normal color and my body was feeling better."