Which condition is a contraindication to using an MDI?

Which condition is a contraindication to using an MDI?

• A. Cannot follow simple commands
• B. Already taken max dose
• C. Is in severe distress but can follow commands
• D. Allergic to albuterol

Answer: (B)

The main idea is that rescue inhaler dosing has safety limits that you must respect. If the patient has already used the maximum number of puffs allowed in the current time period, you should not administer more from the MDI. Exceeding the recommended dose raises the risk of adverse beta-agonist effects (like rapid heart rate, tremors, or other systemic effects) and goes beyond what the protocol permits, so this is a contraindication at that moment. Other factors can complicate use, but they don’t establish an immediate dose-limiting contraindication in the same way. For example, inability to follow commands can make proper technique unreliable, and an allergic reaction to albuterol would prevent use, but the stem emphasizes the dose limit as the decisive constraint here.

The main idea is that rescue inhaler dosing has safety limits that you must respect. If the patient has already used the maximum number of puffs allowed in the current time period, you should not administer more from the MDI. Exceeding the recommended dose raises the risk of adverse beta-agonist effects (like rapid heart rate, tremors, or other systemic effects) and goes beyond what the protocol permits, so this is a contraindication at that moment.

Other factors can complicate use, but they don’t establish an immediate dose-limiting contraindication in the same way. For example, inability to follow commands can make proper technique unreliable, and an allergic reaction to albuterol would prevent use, but the stem emphasizes the dose limit as the decisive constraint here.