This chapter discussed various common mental health disorders and the drug classifications used in managing them. Some of these classifications can be used in more than one disorder. Likewise, multiple drug classifications can be used in treating a single mental health condition. Several of these classifications are associated with maintaining a balance of the neurotransmitters involved. For instance, antidepressants such as SSRIs, SNRIs, and NDRIs increase neurotransmitters’ availability to receptors for longer periods of time. Mood stabilizers, such as lithium, are beneficial in preventing or reducing fluctuations in mood. Antipsychotics are useful in treating the symptoms of schizophrenia. Overall, these drugs can enhance the ability of clients to have the opportunity to live an independent life and be a positive contributor to society. As further research expands our knowledge base, it will continue to alter the treatment of mental health disorders. Furthermore, as the new growth of information is shared, it can play a major role in diminishing the stigma long associated with mental-health illness.