If you like what you're about to read, please vote up to help others.
Trial & Error: This stuff is strong. VERY STRONG! I am guessing that people who say that it doesn't work immediately for them are using a milder formula (0.05% or 0.025%). 0.1% Differin works very well. You only apply a tiiiiiny amount on the acne locations at night time (rub it in). Do this every other night and do it only twice initially. And then stop. You'll see that within a week of stopping, your skin will start to peel like none other. Now you need to leave your skin alone and let it work its magic over the next few weeks. Stay out of the sun (especially during the times of 10am and 2pm when the sun is strongest) and apply the following moisturizers as necessary (basically whenever you feel that your skin is really dry): non-clogging facial moisturizer, eye cream, and non-clogging facial sunscreen (Neutrogena makes products for all these situations). You must apply FACIAL moisturizers b/c your face's skin is so different from the rest of your body (and your eyes have a different type of skin than the rest of your face). Apply these whenever you feel your skin is dry. As your skin is peeling, your skin is becoming more sensitive and you will inevitably feel a STRONG BURN when you apply moisturizers to your face. To reduce the burn but still moisturize, you can purchase Neutrogena's alcohol-free/oil-free facial moisturizer (if you see the ingredients of lotions, almost ALL of them include some type of alcohol which is what causes the burning sensation)! You also want to use a facial wash twice a day; YOU MUST WASH YOUR FACE GENTLY TWICE A DAY! Why? B/c as your skin sheds, it releases oils associated with the acne that may get into pores on other parts of your face (this happened to me. I had acne on my forehead and even though my forehead cleared up, my nose got acne b/c I didn't wash my face twice daily). Avoid excessive sweating, too as this can wreak havoc for your acne, too during the shedding process. If you do sweat, please please please wash your face immediately after you workout (otherwise the nose problem will happen here, too b/c your pores open up when you sweat and bacteria can get in). If your eyelids flare up (mine did) then take 2 Ibuprofen to help the swelling go down. You shouldn't take Advil consistently for more than three consecutive days b/c it's not good for your liver. Wear Sunglasses. After your skin has rehealed and stopped shedding, evaluate your acne again and see whether you need to go through another cycle of Differin. One cycle for me takes 4-5 weeks. I was also taking Minocycline (100 mg twice a day) in conjunction with my Adapalene treatment.