Lithium is a salt that is 60% effective in the treatment of the manic episode of bipolar disorder. It acts as a mood stabilizer. Tegretol, Lamictal, Luvrox, and Paxil are all used to treat depression. 

Schizophrenia is a form of psychosis, and as such is treated with antipsychotic medications such as olanzapine, quetiapine, and risperidone either singularly or in combination if necessary.

Cognitive behavioral therapy and a selective serotonin reuptake inhibitors (SSRI) such as Zoloft, Paxil or Luvox are used to treat obsessive-compulsive disorder. Posttraumatic stress disorder is also treated with SSRIs. Both the manic and depressive stages of bipolar disorder can be treated with the mood stabilizer lithium, while SSRIs can be used to treat the depressive state. Treatment for personality disorders is not successful.

Blood levels of lithium have to be monitored, and signs of overdose include diarrhea, drowsiness, loss of appetite, muscle weakness and trembling, and slurred speech. Lithium is a mood stabilizer used in the treatment of bipolar disorder and schizophrenia. Paxil, Luvox, and Zoloft are selective serotonin reuptake inhibitors (SSRIs) used to treat depression. Inderal is a antiadrenergic agent used to treat posttraumatic stress disorder. 

Cognitive therapy, pioneered by psychologists like Albert Ellis and Aaron Beck, emphasizes the power of our thoughts in determining how we feel and behave. According to Beck's negative triad theory, depression is the result of negative thoughts about oneself, one's experiences, and one's future. A depressed person's thinking is often shaped by distortions like overgeneralization (e.g. “I always mess up in interviews”) and selective abstraction, in which one detail of an incident is emphasized and interpreted in the wrong context (e.g. a person focuses on the single negative aspect of a date).

While some of these terms may sound medical, they belong to the techniques and concepts of psychoanalytic therapy.  The founder of psychoanalytic therapy, Sigmund Freud, was a physician. These terms express an unawareness of mental processes. Since cognitive approaches focus on what is immediately conscious and behavioral approaches avoid focusing on thoughts, they can be eliminated as possible answers.

Carl Rogers who is the founder of Person-Centered (sometimes called Client-Centered) therapy took a humanistic approach. Humanism stresses the importance of freedom, autonomy, and the potential to grow healthily. Rogers believed only three ingredients were needed for these goals of self-actualization to be achieved. Namely, they are unconditional positive regard, genuineness, and empathy.

“Dialectical behavior therapy” is the most widely researched treatment for borderline personality disorder. It was developed by Marsha Linehan and includes 4 core components: mindfulness, distress tolerance, emotional regulation, and interpersonal effectiveness. On the other hand, “logotherapy” is an existential therapy developed by Viktor Frankl and focuses on finding meaning in life. “Cognitive behavioral therapy” is an effective treatment for depression and anxiety, and looks at the impact of one's thoughts on emotions and behaviors. “Rational emotive behavior therapy” was developed by Albert Ellis and focuses on modifying irrational thoughts. “Feminist therapy” emphasizes the impact of women's social roles and includes an equal relationship between therapist and client, therapist self-disclosure, and advocating for socio-political change. 

CBT is a form of therapy that combines Aaron Beck's cognitive therapy and techniques taken from traditional behavioral approaches, like classical and operant conditioning. On the other hand, “rational emotive behavior therapy” (REBT) was developed by Albert Ellis and focuses on changing cognitions and behaviors by focusing on irrational thoughts. “Dialectical behavior therapy” (DBT) is a behavioral approach that was developed by Linehan to treat borderline personality disorder. “Relapse prevention” is an approach to addiction developed by Marlatt that views addiction as an overlearned habit. “Stress inoculation training” is an effective behavioral treatment for PTSD that focuses on cognitions, coping skills, and practice. Of all the treatments listed, “psychoanalysis” is the most unrelated. It focuses on the interactions between the id, ego, and superego, with the goal being to increase insight into the unconscious. 

The goal of cognitive behavior therapy is to modify maladaptive cognitions (thoughts). The goal of traditional psychoanalysis is to "increase insight" into the unconscious. Psychoanalysis may also work to reduce resistance to treatment, and sees resistance as an inevitable part of the process. Psychoanalysis attempts to decrease, rather than increase, the use of defense mechanisms like repression. Psychoanalysis does not directly modify behavior. Crisis intervention focuses on resolving a crisis and restoring previous functioning. 

Lithium helps treat manic episodes, which the question mentioned Tom is struggling with. It is the most common medication for mania. Antabuse is medication for alcoholism, Focalin treats ADHD, Seroquel addresses psychosis, and Lexapro deals with anxiety.