When should i use mouth wash in a day ? is it after brushing or after meals or at night or every time ?

Morning: There is a saying: Brush your teeth in the morning for your spouse and friends and at night before bed for yor teeth. Same goes for mouthwash!

Once or twice: I would recommend rinsing one or two times daily. I would rinse after brushing and flossing. The mouth will be clean of most plaque and debris to allow the medication to contact more areas and to provide better results. This should help curb gingivitis and lessen chance of dental caries and diseases. Morning and/or at bedtime.

Use after brushing: Antibacterial action of the mouthwash is most effective if plaque/food debris is minimal. The most effective way to reduce bacteria is with brushing and flossing. Then use the mouthwash afterwards for even more reduction of bacteria.

Twice daily (AM-PM): It is more effective to use mouthwash after each brushing and flossing or following your complete oral hygiene routine to maintain good dental and general health.

Effectiveness: Brushing 2x/day using pea sized portion of toothpaste for 2 full minutes by the clock provides 2/3 of of bacteria removal. Flossing 1x/day removes most of the other 1/3. Mouthwash, 1 or 2x/day, after brushing/flossing, provides about 1% bacteria removal.