For severe acne, topical antibiotics like nadifloxacin are often not enough on their own. Since you have oily skin, incorporating a topical retinoid (such as adapalene) at night can help unclog pores and regulate oil, while a benzoyl peroxide gel in the morning can target bacteria. However, severe acne typically requires systemic treatment. I highly recommend consulting a dermatologist, who may prescribe oral medications like isotretinoin or oral antibiotics for deeper, more effective clearance. Meanwhile, continue using a gentle, pH-balanced cleanser and a non-comedogenic moisturizer. Rest assured, severe acne is highly treatable with the right personalized medical plan.