Hi Nina,
I have just posted an article regarding vitiligo and some common courses of treatment. As for side effects, it's common to experience itching on the faded patches. If the itching is troublesome, ask your doctor if he or she can recommend a safe anti-itch cream for your particular case. In terms of dryness, stick with fragrance free moisturizers in order to avoid any further irritation to the skin.
Best,
Sue