Which of the following antidepressants acts by blocking the action of monoamine oxidase (MAO)? 21:52 Nervous System Which of the following antidepressants acts by blocking the action of monoamine oxidase (MAO)? a. phenelzine c. amitriptyline b. imipramine d. cocaine Answer: A Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+