- Halfway House
- A residential facility that helps people transition from the treatment program they had been going through back to a normal life. It will often include various forms of therapy to help keep residents on the right track.
- Hallucination
- When a person perceives that something has happened which actually hasn't taken place. This can be the result of drug use or a variety of mental illnesses and conditions.
- Heroin
- An extremely dangerous drug that is derived from the poppy plant. Heroin is considered so dangerous due to its highly addictive nature and the increased tolerance frequent users quickly build.
- Histrionic Personality Disorder
- This is a mental condition that drives individuals to have an extreme desire for attention. This will ultimately drive them to act out in dramatic and unreasonable ways in the pursuit of attention.
- Hypnosis
- A mental state that leaves a person relaxed and more open to suggestion than usual.
- Hypnotherapy
- A type of treatment that relies upon putting a person in a hypnotic state and then addressing the issues they have been struggling with. Some studies have found this to be very effective in treating addiction.