If your symptoms do not improve within a few days or if they become worse, check with your doctor.
Check with your doctor right away if you have fever, chills, pale skin, pinpoint red or purple spots on the skin, sore throat, pain in the upper stomach, or yellow eyes or skin. These may be symptoms of a serious blood problem.
Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.