PROTOPIC Ointment is a prescription medicine used on the skin (topical) to treat eczema. (atopic dermatitis). PROTOPIC Ointment is in a class of medicines called topical calcineurin inhibitors. It is for adults and children 2 years of age and older who do not have a weakened immune system. PROTOPIC Ointment is used on the skin for short periods, and if needed, treatment may be repeated with. breaks in between.