A nurse is teaching a client about using a metered-dose rescue inhaler. Which of the following statements should the nurse include in the teaching

Teaching a client how to correctly use a metered-dose inhaler is essential for ensuring effective delivery of medication to the lungs and optimal management of respiratory conditions. Metered-dose inhaler requires proper coordination of breathing and actuation so that the medication reaches the lower airways instead of depositing in the oropharynx. Correct technique improves drug absorption, enhances therapeutic effect, and reduces side effects. Client education focuses on step-by-step administration, device care, and timing of inhalation. Rationale: A. Using peroxide to clean the mouthpiece of an inhaler is not recommended because it may leave residues or damage the device components. Most inhaler mouthpieces should be cleaned with warm water and air-dried to maintain hygiene and proper function. Harsh chemicals can interfere with medication delivery and device integrity. B. Exhaling fully before bringing the inhaler to the lips is correct because it ensures the lungs are empty, allowing for a deeper and more effective inhalation of the medication. This step maximizes drug deposition in the lower airways. Proper breath coordination improves therapeutic outcomes and reduces medication waste. C. Not shaking the inhaler before use is incorrect because most metered-dose inhalers require shaking to mix the medication properly with the propellant. Failure to shake the device can result in inconsistent dosing and reduced drug effectiveness. Proper preparation ensures uniform medication delivery with each actuation. D. Depressing the canister after you inhale is incorrect because the correct technique is to activate (press) the canister at the beginning of a slow, deep inhalation. This coordination allows the medication to be carried deep into the lungs. Delayed activation reduces drug delivery efficiency and limits therapeutic benefit.