Widely available OTC bactericidal products containing benzoyl peroxide may be used in mild to moderate
acne. The gel or cream containing benzoyl
peroxide is rubbed, twice daily, into the pores over the affected region.
Oral antibiotics used to treat acne include erythromycin or one of the tetracycline antibiotics, but this is required only in severe cases.
Apart from this ,keep skin clean. apply non-oil based moisturizers to prevent dryness of skin and avoid stress.
ref:http://en.wikipedia.