Leflunomide
"Started this drug 6 weeks ago. Developed headache within days & a productive cough. 3 days ago, developed vomiting and severe headache, worse headache I have ever had in all 59 years of my life. Debilitating. Excruciating pain. Went to ER during episode. Nobody knew what to do. They told me my Dr's didn't call them back! I don't believe that. After giving me Ativan & morphine with zofran chaser.  CT of head normal & blood work normal, the sent me.home. I can't get up without it coming back.  Idk the med which was working, now I want the massive HA, migraine really, to go away!! I won't ever take thus drug again! Worse feeling next to MRSA in my bloodsrream, while on Remicade therapy back in 2008!!!"