 [ Symptoms ] what if acetaminophen and ibuprofen does not bring down my fever  i have a possible autoimmune disorder that has not been diagnosed as of yet i frequently get fevers that range between 99 and 101 degrees along with chills and body aches but as of today both tylenol and motrin did not bring my temperature down until after 3 doses [ Disease ] hi this piece of info may help you tell your doctor if you are pregnant plan to become pregnant or are breast feeding methimazole should not be used during pregnancy or breast feeding if you become pregnant while taking methimazole call your doctor immediately methimazole may harm the fetus so with this in mind i would not plan to get pregnant just yet good luck