The brain uses chemicals (neurotransmitters) for internal communication, and a variety of chemicals and medications can affect its function.  Medications have revolutionized our ability to manage  conditions affecting the brain and the emotions. Medications can have direct impact on such  essential functions  as sleep (or arousal), mood, and anxiety.  When these are outside of a safe or comfortable range, medications can help restore the individual's ability to function safely and productively.  

In some conditions, such as epilepsy and certain mood disorders,  long-term use of medications is essential for optimal function.  In other cases, medications may restore a safe balance, helping regulate function when the individual otherwise cannot.  In such cases, a treatment goal may be to restore or develop the individual's ability to self-regulate.