Hi, I am 53, 5'9" and 190lb arthritis patient on Humira, prednisone, methotrexate, folic acid and vicodin as needed for pain. I had a cyst that became infected and I was put on 2000 mg Kelflex a day. I had surgery to remove the cyst and had to discontinue the antibiotic after 8 days due to a reaction with digestive problems and the start of thrush in my mouth. My wound has healed but since stopping the antibiotic I have developed a headache in the front of my head with some pain behind my right eye. The headache is only when I cough or bend over and is more like sinus pressure and pain. My sinuses are draining some but I can breath through my nose easily. My latest symptom is a metallic taste in the back of my tongue. Any help you can give me would be greatly apppreciated. Thanks...John