It's been 2 days since I've started taking this medicine. I'm experiencing dryness and a darker tone - will stopping it help?

Should I continue using it.And how long will it take?I have mild acne but more of a scars will taking it affect scars.N I've had only two doses of it will stopping it affect adversely.i can spot my skin tone becoming darker and also dryness n a few dark circles as well.Pls help n tell if I shudder continue or not n if I don't will my skin be fair number smooth again?

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