Fluoxetine is an antidepressant of the type known as selective serotonin reuptake inhibitors (SSRI). It is sold in the United States under the brand names Prozac and Sarafem.


Fluphenazine is a phenothiazine antipsychotic sold under the brand names Permitil and Prolixin in the United States. It is also available under its generic name.


Flurazepam is a benzodiazepine hypnotic (sleeping medication) that is given by mouth. It is sold in the United States under the brand name of Dalmane, but is also manufactured and sold by several companies under its generic name.


Fluvoxamine is an antidepressant of the type known as selective serotonin reuptake inhibitors (SSRI). It is marketed in the United States under the brand name Luvox.


Frotteurism is a disorder in which a person derives sexual pleasure or gratification from rubbing, especially the genitals, against another person, usually in a crowd. The person being rubbed is a victim.


Gabapentin is an anti-seizure medication. It is sold in the United States under the trade name Neurontin.


Galantamine belongs to a class of drugs called acetylcholinesterase inhibitors. In the United States galantamine is sold under brand name Reminyl.

Ganser's syndrome

Gender identity disorder

Gender identity disorder is a condition characterized by a persistent feeling of discomfort or inappropriateness concerning one's anatomic sex. The disorder typically begins in childhood with gender identity problems and is manifested in adolescence or adulthood by a person dressing in clothing appropriate for the desired gender, as opposed to one's birth gender.

Gender issues in mental health

The term gender is often used to classify the anatomy of a person's reproductive system as either male or female. In the social sciences, however, the concept of gender means much more than biological sex.

Generalized anxiety disorder

Generalized anxiety disorder, or GAD, is a disorder characterized by diffuse and chronic worry. Unlike people with phobias or post-traumatic disorders, people with GAD do not have their worries provoked by specific triggers; they may worry about almost anything having to do with ordinary life.

Genetic factors and mental disorders

In recent years, mental health professionals have become increasingly aware of the importance of genetic factors in the etiology (causes) of mental disorders. Since the Human Genome Project began its mapping of the entire sequence of human DNA in 1990, the implications of its findings for psychiatric diagnosisand treatment have accumulated rapidly.

Geriatric Depression Scale

The Geriatric Depression Scale (GDS) is a 30-item self-report assessment designed specifically to identify depression in the elderly. The items may be answered yes or no, which is thought to be simpler than scales that use a five-category response set.

Gestalt therapy

Gestalt therapy is a complex psychological system that stresses the development of client self-awareness and personal responsibility.

Ginkgo biloba

Ginkgo biloba is an herbal remedy that has been utilized for thousands of years in China and elsewhere. It is obtained from the leaves and seeds of a plant that is commonly known as the maiden hair tree, believed to be the oldest living species of tree.


Ginseng is an herbal preparation derived from the aromatic root of a plant of the genus Panax, which is native to East Asia. Ginseng belongs to the Araliaceae family of plants.


Grief, which is also known as bereavement, is a term used to describe the intense and painful emotions experienced when someone or something a person cares about either dies or is lost. The emotional pain from losing a loved one, whether it is a spouse, child, parent, sibling, friend, or pet, can be the most severe suffering a person must endure.

Grief counseling

Grief counseling refers to a specific form of therapy, or a focus in general counseling with the goal of helping the individual grieve and address personal loss in a healthy manner. Grief counseling is offered individually by psychologists, clergy, counselors or social workers, in groups led by professionals, as well as informal support groups offered by churches, community groups, or organizations devoted to helping individuals grieve specific losses.

Group homes

Group homes are small, residential facilities located within a community and designed to serve children or adults with chronic disabilities. These homes usually have six or fewer occupants and are staffed 24 hours a day by trained caregivers.

Group therapy

Group therapy is a form of psychotherapyin which a small, carefully selected group of individuals meets regularly with a therapist.

Guided imagery therapy

Guided imagery therapy is a cognitive-behavioral technique in which a client is guided in imagining a relaxing scene or series of experiences.


A hallucination is a false perception occurring without any identifiable external stimulus and indicates an abnormality in perception. The false perceptions can occur in any of the five sensory modalities.

Hallucinogens and related disorders

Hallucinogens are a chemically diverse group of drugs that cause changes in a person's thought processes, perceptions of the physical world, and sense of time passing. Hallucinogens can be found naturally in some plants, and can be synthesized in the laboratory.


Haloperidol is a major tranquilizer. It is used to treat psychoses, senile dementia, Tourette's syndrome, and certain serious behavioral disorders in children.

Halstead-Reitan Battery

The Halstead-Reitan Neuropsychological Test Battery is a fixed set of eight tests used to evaluate brainand nervous system functioning in individuals aged 15 years and older. Children's versions are the Halstead Neuropsychological Test Battery for Older Children (ages nine to 14) and the Reitan Indiana Neuropsychological Test Battery (ages five to eight).

Hamilton Anxiety Scale

The Hamilton Anxiety Scale (HAS or HAMA) is a 14-item test measuring the severity of anxiety symptoms. It is also sometimes called the Hamilton Anxiety Rating Scale (HARS).

Hamilton Depression Scale

The Hamilton Depression Scale (HDS or HAMD) is a test measuring the severity of depressive symptoms in individuals, often those who have already been diagnosed as having a depressive disorder. It is sometimes known as the Hamilton Rating Scale for Depression (HRSD) or the Hamilton Depression Rating Scale (HDRS).

Hare Psychopathy Checklist

The Hare Psychopathy Checklist-Revised (PCL-R) is a diagnostic tool used to rate a person's psychopathic or antisocial tendencies. People who are psychopathic prey ruthlessly on others using charm, deceit, violence or other methods that allow them to get with they want.

Historical, Clinical, Risk Management-20

The Historical, Clinical, Risk Management-20 (HCR-20) is an assessment tool that helps mental health professionals estimate a person's probability of violence.

Histrionic personality disorder

Histrionic personality disorder, often abbreviated as HPD, is a type of personality disorder in which the affected individual displays an enduring pattern of attention-seeking and excessively dramatic behaviors beginning in early adulthood and present across a broad range of situations. Individuals with HPD are highly emotional, charming, energetic, manipulative, seductive, impulsive, erratic, and demanding.


In the United States, definitions of homelessness help determine who is able to receive shelter and assistance from certain health and social service providers. The Stewart McKinney Homeless Assistance Act of 1987 defines a homeless person as any individual who lacks housing, including an individual whose primary residence during the night is a supervised public or private facility that provides temporary living accommodations or an individual who is a resident in transitional housing.


Hospitalization or inpatient care is the most restrictive form of treatment for a psychiatric disorder, addictive disorder, or for someone with more than one diagnosis. Whether it is voluntary or involuntary, the patient relinquishes the freedom to move about and, once admitted, becomes subject to the rules and schedule of a treatment environment.

House-tree-person test

The house-tree-person test (HTP) is a projective personality test, a type of exam in which the test taker responds to or provides ambiguous, abstract, or unstructured stimuli (often in the form of pictures or drawings). In the HTP, the test taker is asked to draw houses, trees, and persons, and these drawings provide a measure of self-perceptions and attitudes.


Hypersomnia refers to a set of related disorders that involve excessive daytime sleepiness.


Hypnotherapy is a combination of hypnosis and therapeutic intervention. The therapist leads the patient to positive change while the patient is deeply relaxed in a state of heightened suggestibility called trance.

Hypoactive sexual desire disorder

Hypoactive sexual desire disorder (HSDD) is defined as the persistent or recurrent extreme aversion to, absence of, and avoidance of all, or almost all, genital sexual contact with a sexual partner. Synonyms for HSDD include sexual aversion, inhibited sexual desire, sexual apathy, and sexual anorexia.


The primary feature of hypochondriasis is excessive fear of having a serious disease. These fears are not relieved when a medical examination finds no evidence of disease.

Imaging studies

Imaging studies are tests performed with a variety of techniques that produce pictures of the inside of a patient's body.


Imipramine is a tricyclic antidepressant. It is sold under the brand name Tofranil in the United States.

Impulse-control disorders

Impulse-control disorders are psychological disorders characterized by the repeated inability to refrain from performing a particular action that is harmful either to oneself or others.

Informed consent

Informed consent is a legal document in all 50 states, prepared as an agreement for treatment, non-treatment, or for an invasive procedure that requires physicians to disclose the benefits, risks, and alternatives to the treatment, non-treatment, or procedure. It is the method by which a fully informed, rational patient may be involved in the choices about his or her health.

Inhalants and related disorders

The inhalants are a class of drugs that include a broad range of chemicals found in hundreds of different products, many of which are readily available to the general population. These chemicals include volatile solvents (liquids that vaporize at room temperature) and aerosols (sprays that contain solvents and propellants).


Insomnia is a condition that occurs when a person in unable to get long enough or refreshing enough sleep at night. Insomnia can result from an inability to fall asleep, an inability to stay asleep, or waking too early before having gotten enough sleep.

Intelligence tests

Intelligence tests are psychological tests that are designed to measure a variety of mental functions, such as reasoning, comprehension, and judgment.

Intermittent explosive disorder

Intermittent explosive disorder (IED) is a disorder characterized by impulsive acts of aggression, as contrasted with planned violent or aggressive acts. The aggressive episodes may take the form of "spells" or "attacks," with symptoms beginning minutes to hours before the actual acting-out.

Internet addiction disorder

Internet addictiondisorder refers to the problematic use of the Internet, including the various aspects of its technology, such as electronic mail (e-mail) and the World Wide Web. The reader should note that Internet addiction disorder is not listed in the mental health professional's handbook, the Diagnostic and Statistical Manual of Mental Disorders, fourth edition, text revision (2000), which is also called the DSM.

Interpersonal therapy

Interpersonal therapy (IPT) is a short-term supportive psychotherapy that focuses on the connection between interactions between people and the development of a person's psychiatric symptoms.


A standard dictionary defines intervention as an influencing force or act that occurs in order to modify a given state of affairs. In the context of behavioral health, an intervention may be any outside process that has the effect of modifying an individual's behavior, cognition, or emotional state.

Involuntary hospitalization

Involuntary hospitalization is a legal procedure used to compel an individual to receive inpatient treatment for a mental health disorder against his or her will. The legal justifications vary somewhat from state to state, but are generally based on a determination that a person is imminently dangerous to self or others; is gravely disabled; or clearly needs immediate care and treatment.