Pharmacology General 1ddee525 Half life of dobutamine is - A 120 sec B 200 sec C 20 sec D 20 min High-Yield Explanation Ans. is 'a' i.e., 120 sec For dobutamine i) Onset of action ---> after 1-2 min. ii) Peak action between 1-20 iii) Duration of action < 10 min. Half life -*2 min.