Yes, you can apply a moisturizer to help with the dryness caused by your acne treatment. It is important to choose a moisturizer that is non-comedogenic and fragrance-free. You can also adjust how often you apply the acne treatment based on how your skin reacts to it. Make sure to wait a bit after cleansing your face before applying the treatment, and consider using a gentle face cleanser with a pH similar to that of normal skin.