Bronchitis
"8 days on Factive - cured the bronchitis - worsened everything else. On the 8th day I got an allergic reaction that got even worse on the next day, swollen lips, unbelievably itchy rash covering head to toe. Took nearly a week of treatment.  Had to get injections to calm it down. A quick look on the internet shows that this reaction is common after having finished taking the medicine."