A client is ordered to receive azelastine (Optivar) nasal spray. This antihistamine has a half-life of 22 hours. The nurse anticipates this medication to be ordered _____ per day
a. once
b. twice
c. three times
d. four times
ANS: A
With a half-life of 22 hours, azelastine (Optivar) nasal spray should be dosed every day.
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