Benzer 5 Gel 20 gm is used to treat bacterial skin infections, such as acne (pimples). It contains Benzoyl Peroxide, which kills bacteria, reduces inflammation and unclogs pores. It decomposes to release oxygen when applied to the skin. This oxygen acts as a bactericidal agent, killing Propionibacterium acnes, the bacteria that cause acne. This medicine increases the turnover rate of epithelial cells (cells that line the surface of the skin), eventually helps in peeling the skin and treating comedones (skin-coloured, small bumps due to acne). It also has a mild drying effect, allowing excess oils and dirt to be washed away from the skin. It may cause common side effects, such as dry skin, erythema (skin redness), a burning sensation, itching, skin irritation, swelling, blistering, crusting, and a rash on the skin. Most of these side effects are temporary and gradually resolve over time. However, consult the doctor if any of these side effects persist or worsen.