Actions while clicking an avatar

[TrashcanPatrol]

Hello, is it possible to have an action occur when you click on a specific place on an avatar? If so, how can this be done?
What I'm trying to do is have a drop-down menu where a "toolbox" is. If the player selects the correct tool, which is medicine in this case, MEDICINE will be set to True. Then, the cursor will change to an image of a pill or something, and if the player clicks on the patient's face and MEDICINE = True, the patient will respond and say "I feel better" or something to that extent.
How could I do this? I have a dropdown already that prints "Medicine equipped" when the medicine is selected, as well as turns MEDICINE to True...