The determination by a physician of the cause of a person's problems, usually by identifying both the disease process and the agent responsible. A psychiatric condition in which the main symptoms are chronic and persistent apprehension and tension that are not related to any situation in particular. There may be many unspecific physical reactions, such as trembling, jitteriness, sweating, lightheadedness, and irritability. A prolonged and usually abnormal inability to obtain adequate sleep. A feeling of tiredness, drowsiness, or lack of energy.
Melancholia is used today to refer to certain symptoms that occur in severe depression.
Drugs used in the treatment of clinical depression . These substances work by stopping an enzyme that breaks down stimulating chemicals in the brain. Chemicals that transfer messages from one nerve cell to another or from a nerve cell to a muscle cell. A hormone that regulates blood pressure by causing blood vessels to narrow and the heart to beat faster. A physician who specializes in the treatment of mental, emotional, or behavioral problems.