Hydroxyquinone: Hydroquinone 2–4% as cream or lotion, applied accurately to pigmented areas at night for 2–4 months. This may cause contact dermatitis (stinging and redness) in 25% of patients. Azelaic acid cream, lotion or gel can be applied twice daily long term, and is safe in pregnancy. This may also sting
Answered 3/1/2017
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