La Roche-Posay
Questions & Answers

Salicylic acid, benzoyl peroxide, and alcohol will all significantly reduce the amount of oil on your skin so you might feel dried out. I wouldn't worry about it too much unless you break out in a rash.

I think most acne treatments cause some side effects like dry skin, itchiness, and redness. Drying your skin out is part of the process of eliminating the bacteria that causes it in the first place. Those side effects generally subside within a week or so.