will arava cause me harm?
<answer> Yes, Side effects: 1 fever, chills, body aches, flu symptoms; 2 white patches or sores inside your mouth or on your lips; 3 chest pain; chest pain, dry cough, wheezing, feeling short of breath. <context> Stop using leflunomide and call your doctor at once if you have any of these serious side effects: 1  fever, chills, body aches, flu symptoms; 2  white patches or sores inside your mouth or on your lips; 3  chest pain;  chest pain, dry cough, wheezing, feeling short of breath (you may also have a fever);