A nurse is providing discharge teaching to a client has a new prescription for a metered dose inhaler (MDI). Which of the following instructions should the nurse include in the teaching?

Shaking the inhaler for 3 to 5 seconds ensures that the medication is properly mixed and will be delivered effectively during inhalation. B. The correct waiting time between inhalations is usually 1 minute, not 2 minutes, to allow for optimal bronchodilation. C. Pressing down twice on the MDI canister is incorrect. The client should press down once and inhale the medication deeply. D. Rinsing the mouth after using the MDI is recommended to prevent oral thrush, but using water, not mouthwash, is generally advised to avoid potential irritation.