What should you know about medication for rashes on skin?

A rash may reflect irritation, allergy, infection, inflammation or a reaction to a medicine. A drug rash can be flat or raised, itchy or tender, and may start after a new prescription, dose change or over-the-counter product. Sun sensitivity can make exposed skin react after ultraviolet exposure. Distribution, timing, associated symptoms and the full medication list help distinguish these possibilities; a photograph can help when the rash changes quickly.

Do not stop an essential medicine or start a leftover cream without speaking with the prescriber. List every medicine, supplement and topical product, including recent changes. A clinician may suggest an oral antihistamine for itch or a topical corticosteroid for selected inflammatory rashes. Use gentle fragrance-free cleansing, avoid scratching and protect irritated skin from sun. Follow directions closely because stronger steroid preparations and sensitive body areas need particular care.

Get urgent help for trouble breathing, facial or tongue swelling, faintness, skin peeling, extensive blistering, fever, or painful sores in the mouth or eyes. Arrange prompt medical review for a rapidly spreading rash or one that begins soon after a new medicine, even if itching is mild.

Ask whether the pattern fits a drug rash or sun sensitivity, which treatments are safe for the location, and whether the suspected medicine should be changed.