sentences:  Oral antibiotics are recommended for no longer than three months as antibiotic courses exceeding this duration are associated with the development of antibiotic resistance and show no clear benefit over shorter durations.If long-term oral antibiotics beyond three months are used, then it is recommended that benzoyl peroxide or a retinoid be used at the same time to limit the risk of "C. acnes" developing antibiotic resistance.The antibiotic dapsone is effective against inflammatory acne when applied to the skin.