Acne is a skin condition that can affect anyone of any age, but it is most common in teenagers and young adults going through puberty. About eight in 10 preteens and teens have acne, states "Kids Health." Acne occurs when hair follicles become clogged with sebum, or oil, bacteria and dead skin cells. When this occurs, the hair follicle becomes infected, creating a pimple.

Salicylic Acid

Salicylic acid is an active ingredient in a variety of over-the-counter acne washes and spot treatments available at drugstores and grocery stores. Salicylic acid is proven to be effective against acne in some cases, states the Mayo Clinic. Salicylic acid helps to dry up excess sebum that has been created on the skin and helps flush away dead skin cells.

Benzoyl Peroxide

Benzoyl peroxide, like salicylic acid, is available as an active ingredient in over-the-counter acne washes and spot treatments. "These medicines kill bacteria, dry up the oil and make your skin peel off," states the American Academy of Family Physicians. Additionally, benzoyl peroxide may be an active ingredient in prescription acne medications. Sometimes, benzoyl peroxide is prescribed in conjunction with another prescription medication, like erythromycin and clindamycin.

Retinoids

Retinoids are topical acne medications that are prescribed by a dermatologist. Retinoids, like adapalene or tretinoin, are derived from vitamin A and can make skin very sensitive to the sun. While using retinoids, sunscreen must be applied before going outside. Pregnant women should not use retinoids because they can cause birth defects.

Oral Antibiotics

Oral antibiotics may be prescribed by a dermatologist, usually for a short period of time, to clear bacteria from the skin. Oral antibiotics may be used in combination with another acne product, but only under the supervision of a dermatologist.

Isotretinoin

Isotretinoin is a strong acne medication reserved for the most resistant cases of acne. Isotretinoin is an oral medication prescribed only for a few months, and during this time patients must be watched closely by a doctor. Isotretinoin may cause severe side effects, including vision changes, thoughts of suicide and depression.