Drugs and Inhalants





Also known as

  • Marijuana, Pot, Grass, Joints, Ganja, Hashish, Weed


  • Cannabis comes from the hemp plant. It can come in various forms – ‘loose’ cannabis leaves, compressed blocks, corn cob-shaped, oil, etc.
  • It contains THC (tetrahydrocannabinol) which affect one’s mood – causing euphoria, and also anxiety, disorientation or paranoia.
  • Cannabis can affect concentration and memory which weakens the abuser’s ability to learn.

Withdrawal symptoms / Signs of negative effects

Physical harm

  • Damage to specific organs and tissues
  • Impairments in behavioural and neurological functioning
  • Distorted thinking and perception
  • May cause increased rates of psychotic illnesses and worsen psychosis
  • Smoked cannabis contains 50% - 70% more cancer-causing materials than cigarette smoke
  • Poor balance and co-ordination

Mental harm

  • Inability to concentrate
  • Extreme anxiety, depression, confusion and paranoia (irrational fear or suspicion)
  • Decline in motivation and drive in long-term users
  • Moodiness, irritability, anxiety and tension

Prolonged drug abuse leads to addiction, leading to downstream family and social problems.  Drug abuse therefore affects not only the abusers, but also their families and loved ones.

Cannabis use is directly associated with usage of other dangerous substances.

Cannabis is also listed as a Schedule I drug in the 1961 Single Convention on Narcotic Drugs.  The 1961 Single Convention on Narcotic Drugs is an international agreement to control the cultivation of opium poppy, coca bush, cannabis plant, and their products which are referred to as "narcotic drugs".  Singapore is one of the 184 signatories to the Convention.  Together with the other signatories, we are committed to prevent the misuse and illicit trafficking of these drugs, which include cannabis.


Cannabis is classified as a Class A drug under the Misuse of Drugs Act.

Possession or consumption of cannabis:

  • Up to 10 years of imprisonment or S$20,000 fine or BOTH

Illegal traffic, import or export of:

  • Cannabis of more than 500 grams > May face the death penalty
  • Cannabis resin of more than 200 grams > May face the death penalty
  • Cannabis mixture of more than 1,000 grams > May face the death penalty
Last Updated: Monday, 13 January 2014