A metered dose inhaler should be held away from the mouth during actuation to:

a. decrease the effect of inertial impaction on the particles.
b. decrease the effect of gravity on the parti-cles.
c. ensure deposition in the oropharynx.
d. prevent cross-contamination.

ANS: A
This technique will decrease the effect of inertial impaction on the particles in the oropharynx.