Penvik 250 mg is an antibiotic medication that contains Phenoxymethyl Penicillin (Penicillin V), a type of penicillin used to treat a wide range of bacterial infections. It works by inhibiting the synthesis of bacterial cell walls, leading to the death of the bacteria and thus treating the infection. Penvik is effective against various bacterial infections, including those affecting the respiratory tract, skin, and soft tissues, as well as dental infections and prevention of certain complications like rheumatic fever.