What happens next?

How to get rid of your cold with mouthwash
Measure the amount of mouthwash recommended by the manufacturer and pour into a clean cup.
Typically, the recommended amount is 4 teaspoons (20ml). However, make sure that you check the label of your mouthwash before measuring.
Do not swig mouthwash directly from the bottle, especially if you are feeling sick. There is no way of knowing if you have taken the correct dosage.