I am using benzoyl peroxide 2.5% gel to treat my acne.is it harmful to use?to treat the dryness caused due to benzoyl peroxide can i use alovera gel?if yes please say when i should apply aloevera gel that is before or after applying benzoylperoxidgel?

Safe to use: Benzoyl peroxide has been used for decades to treat acne, and it is safe to use, allergies to this product are rare. If you have dry or sensitive skin, then using the product less frequently will help till your skin adapts to the medication. Some peeling and dryness is to be expected. I would apply a good sunscreen after you have applied the benzoyl peroxide - will help more than aloe vera.