ATS – Amphetamine-type stimulants (ATS) refers to a group of substances comprised of synthetic stimulants from the amphetamines-group of substances, including amphetamine, methamphetamine, methcathinone and the ecstasy-group substances (MDMA and its analogues).In cases where countries report to UNODC without indicating the specific ATS they are referring to, the term non-specified amphetamines is used. In cases where ecstasy is referred to in enclosed brackets (‘ecstasy'), the drug represents cases where the drug is sold as ecstasy (MDMA) but which may contain a substitute chemical and not MDMA.

Coca paste (or coca base) – An extract of the leaves of the coca bush. Purification of coca paste yields cocaine (base and hydrochloride).

Cocaine (base and salts) – Coca paste, cocaine base and cocaine hydrochloride referred to in the aggregate.

Crack (cocaine) – Cocaine base obtained from cocaine hydrochloride through conversion processes to make it suitable for smoking.

Heroin HCl (heroin hydrochloride) – Injectable form of heroin, sometimes referred to as ‘Heroin no. 4.'

Heroin no. 3 – A less refined form of heroin suitable for smoking.

Opioid – A generic term applied to alkaloids from opium poppy, their synthetic analogues, and compounds synthesized in the body.

Opiate – A subset of opioids comprised of the various products derived from the opium poppy plant including opium, morphine and heroin.

Poppy straw – All parts (except the seeds) of the opium poppy, after mowing.