Final answer:
A patient experiencing mood swings from euphoria to depression is likely suffering from bipolar disorder, a common mood disorder characterized by dramatic, episodic fluctuations in mood and energy.
Step-by-step explanation:
A patient whose mood ranges between euphoria and depression is likely suffering from bipolar disorder. This mental illness is characterized by dramatic shifts in energy and mood, often affecting the individual's ability to carry out day-to-day tasks.
Bipolar disorder, which was previously known as manic depression, causes individuals to swing between manic (euphoria) and depressive episodes.
Mood disorders, including bipolar disorder, are among the most common causes of illness-related hospitalization in the U.S., with a significant portion of U.S. adults likely to be affected on an annual basis.
Treatment options for bipolar disorder typically include psychotherapy, medication, and in some cases, hospitalization to stabilize mood swings. Major depression, another mood disorder, also involves prolonged periods of sadness but lacks the manic episodes characteristic of bipolar disorder.