Budecort 200mcg Rotacap is used to preventasthma. Rotacaps must not be swallowed. Check the label for directions before use. Place the capsule at the base of rotahaler, not in the mouthpiece. Twist the mouthpiece completely until your hear a click and breathe in deeply through the mouthpiece. Hold your breath for up to 10 seconds. If some powder remains in the rotahaler repeat the process.