Mouthwash is a great antiseptic mouth and ensure a pleasant breath after rinsing, but not replace brushing, but comes to complete it. The composition is found in chlorhexidine (antiseptic recommended for a wide range of germs) are mainly used in preoperative and postoperative, in periodontitis and other gum disease. So never use it "by ear", but only under medical supervision. Both versions of mouthwash change the ecology of the oral cavity (indeed, the chlorhexidine in a greater proportion), so that after a period of treatment is recommended a pause. Usually you can find these operating instructions on the packaging.