PSYCHOLOGY OF EMOTIONS

Typically your friend, Sally, is kind of a slacker. She is always complaining that she can’t get her school work done because there is never enough time with how much she works. Lately, Sally has really turned her act around at school. She is turning in all her school work. Sally claims she isn’t sleeping much these days and feels really happy! However, Sally has outbursts of anger, which you saw when she yelled at a kid for bumping into her in the hall. What drug might Sally be on to change her behavior like this?