ocr: Precautions While Using This Medicine fyou will be taking this medicine for a long time, asfor arthrits (rheumatism), Jour doctor should check your progress 2t1 regular visits. your doctor may want to do certain tests to find out if unwanted effects are occumng, especiallyif'you: are takumgphenylbutazone. The tests are very important because senous side effects, including ulcers, bleeding or blood