Skin darkening due to lexapro (escitalopram)? how to reverse?

Probably not: Lexipro would be unlikely to be the cause of skin hyperigmentation. What do you mean by "skin darkening"? Any other changes?

Where dark?: Pigmentation inside mouth + lower lip is sometimes due to this antidepressant. You may also have darker skin from other causes. Your DR can change your anti depressant and a dermatologist will help if you have dark areas (melasma) on your face.

It's possible: There is a report that lexapro ((escitalopram), luvox (fluvoxamine) and Prozac (fluoxetine), caused photosensitivity rash with darkening in sun-exposed areas. It is not a common side effect (which never matters if you are the rare one). Other meds, supplements, and skin products can do this, too. Check with your doc. Avoid sun exposure (wear hats, long sleeves & pants). Darkening can be treated