Hi.. Welcome to HEALTHCARE MAGIC.. I have gone through your query and can understand your concern.. As per your complain the medications advised to you are suitable to cure acne and dark spots but you should understand that the hyperpigmentation that has occurred after the acne is post inflammatory hyperpigmentation and can take a longer period of a few months to resolve.. You can keep using Tretin cream as it is a retinoid.. You can also use a combination of creams containing Benzoyl peroxide and arbutin.. You can also use AHA Glow facewash twice a day as it contains salicylic acid and glycolic acid and is helpful in depigmentation.. You can use Vitamin E gel once at night for reducing pigmentation.. You can take Vitamin C supplements.. As you use AHA glow you need not to use clearoff gel but aczit capsules are retinoids and can be taken.. You can also go for microdermabrasion and chemical peeling. Hope this information helps.. Thanks and regards. Dr.Honey Nandwani Arora.