After using an inhaled corticosteroid, what should the patient do to prevent thrush?

• A. Brush teeth after use
• B. Rinse mouth before use
• C. Rinse mouth after medication
• D. Swallow quickly without rinsing

Answer: (C)

Inhaled corticosteroids can deposit in the mouth and throat, reducing local immunity and allowing Candida (thrush) to grow. Rinsing the mouth after use immediately removes much of the residual steroid from the oral mucosa, lowering the risk of thrush. Gargling helps as well, and using a spacer can further reduce drug deposition in the mouth. Rinsing before use doesn’t remove drug already present, swallowing quickly won’t clear it, and while brushing after helps oral hygiene, it doesn’t address the residual medication as effectively as rinsing right after inhalation.