Katherine is a 16-year-old female attending high school who presents to you with complaints of depressed mood, increased appetite, and weight gain of 30 pounds. She lives with her parents and is an only child. Her mother indicates that her problems started less than one year ago when she was admitted to the hospital for several weeks after fighting at school. She was getting less than 4 hours of sleep for ten days because she was working on her new YouTube videos about fashion. She started getting suspicious of her family and friends, believing they were trying to poison her, so she stopped eating and lost 10 pounds in less than a week. She had several days of irritability and agitation to the point of pacing all night for three nights in a row before her admission. She was also yelling at family and friends (on her cellphone) all hours of the night. She had been using marijuana daily for about two years leading up to this hospitalization but stopped using while in hospital. She has not returned to marijuana use. Her psychiatrist treated Katherine with lithium 1200 mg po qhs and olanzapine 10 mg po qhs in hospital. She stopped her olanzapine after about two months but remained on the lithium. She had been taking her medications consistently until she gained 30 pounds. She is 5’4” and weighs 170 pounds.