The nurse needs to be aware, before administering, that what drug has a duration of action of only 1 to 2 minutes?
A) Isoproterenol
B) Dopamine
C) Phenylephrine
D) Ephedrine
A
Feedback:
Isoproterenol has a duration of action lasting 1 to 2 minutes with immediate onset of action. Dopamine acts as long as the drug is infusing with peak action 10 minutes after initiating the infusion. Phenylephrine's duration of action is 15 to 20 minutes. Ephedrine's duration of action will depend on how the drug is administered as it could be given intramuscularly, subcutaneously, IV, or orally, but no matter by what route it is administered, the duration of action is longer than 1 to 2 minutes.
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