Don't use this drug for a long period of time. Call your doctor if your eczema symptoms haven't improved or have worsened after six weeks of use. Tell your physician if your symptoms return after your treatment with tacrolimus ends. Only apply tacrolimus ointment to the area of the skin that's affected by eczema. Use the smallest dose possible to control your symptoms. Don't use this medicine to treat eczema in kids who are younger than two years old. Only use the 0.03 percent ointment to treat children between ages 2 and 15.