Obsessive-compulsive disorder (OCD)

An anxiety disorder characterised by unwanted recurring thoughts, ideas or images (obsessions) or repetitive behaviours (compulsions) that interfere with daily life.

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Opiate

One of a group of alkaloids derived from the opium poppy (Papaver somniferum) with the ability to induce analgesia, euphoria, and, in higher doses, stupor, coma, and respiratory depression. The term opiate excludes synthetic opioids such as heroin and methadone.

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Opioid

The term applied to alkaloids derived from the opium poppy (Papaver somniferum) and synthetic drugs that interact with the same specific receptors in the brain. These substances have the capacity to relieve pain, and produce a sense of well-being (euphoria). Heroin, methadone, codeine, morphine and opium are opioids.

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Opium

The crude mixture obtained by the air drying of the juice that oozes from incisions made in the ripened seedpod capsule of the opium poppy, Papaver somniferum. It contains a number of important alkaloids such as morphine, codeine, and papaverine.

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Outreach

A community-based activity with the overall aim of facilitating improvement in health and reduction of risk or harm for individuals and groups not effectively reached by existing services or through traditional health education channels.

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Over-the-counter drug

Drug that can be sold or administered without a prescription. Can be used by illicit drug users for self-medication or psychoactive effects.

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Overdose

When the amount of the drug taken exceeds the body's ability to cope with the drug resulting in stupor, coma, respiratory depression or death.

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