What is cannabis?

Cannabis is a drug depressant drug, which means it slow down message travelling between your body and brain. When a large dose of cannabis is taken, it will also produce hallucinogenic effects. The main active chemical in cannabis is  THC ( Delta-9 tetrahydrocannabinol.

Marijuana, yarndi. pot, weed, hash, dope, gujan, stick, joint, chronic (synthetic form), cone, choof, dabs, dabbing, BHO.

Also known in local terms_

Marijuana, pot, grass, joints, hashish and weed.

How it’s used?

Cannabis is usually smoked or eaten and comes in different form;

  • Marijuana – the dried plant that is smoked in a joint or a bong. This is the most common form
  • Hashish – the dried plant resin that is usually mixed with tobacco, and smoked or added to food and baked; such as cookies and brownies.
  • Hash Oil – liquid that is usually added to the tip of a cigarette and smoked

It takes about an hour to feel the effects of eating cannabis, which means it’s easy to have too much. If it’s smoked the effects usually felt straight away. However, smoking can cause a number of negative side-effects, especially in a long run.

Synthetic Cannabis -Cannabis can also come in synthetic form, which may be more harmful than real cannabis.

Butane hash oil and hash oil – may also be refined into what are known as Dabs or Dabbing, slang names for concentrated butane hash oil (or BHO), a relatively a new administering/ ingesting cannabis that involves inhalation of highly concentrated THC.

Effects of cannabis

There is no safe level of drug use. Use of any drug always carries some risk. It’s important to be careful any type of drug.

Cannabis affects everyone differently, based on;

  • Size, weight and health
  • Whether the person is used taking it
  • Whether other drugs are taken at the same time
  • The amount was taken and the strength of the drug

The effects of cannabis may be felt immediately if smoked or within an hour or two if eaten and effects may be included;

  • Feeling relaxed and sleepy
  • Spontaneous laughter and excitement
  • Increased appetite, Dry Mouth and Quite&Reflective Mood

If large amount or a strong batch are taken, individual may also experience;

  • Trouble concentrating and Blurred vision
  • Clumsiness and Slower reflexes
  • Bloodshots and Seeing or Hearing things that aren’t there
  • Increase heart rate, Low blood pressure, Mixed anxiety and paranoia

Long-term effects

Regular use of cannabis may eventually cause:

  • Memory loss, Learning difficulties, Mood swings
  • Regular colds or flu, Reduced sex drive
  • Difficulty having children (low fertility in males and females)
  • Needing to use more to get the same effect
  • Dependence on cannabis
  • Financial, work and social problem

Smoking cannabis can also cause;

  • Sore throat
  • Asthma
  • Bronchitis
  • Cancer (if smoked with tobacco)

Those with a family history of mental illness are more likely to also experience anxiety, depression and psychotic symptoms after using cannabis. Psychotic symptoms include delusions, hallucinations and seeing or hearing things that do not exist or are distorted.

Cannabis and mental health

Using cannabis with other drugs

The effects of taking cannabis with other drugs − including over-the-counter or prescribed medications − can be unpredictable and dangerous.

Cannabis + alcohol: nausea, vomiting, panic, anxiety and paranoia.

Cannabis is sometimes used to help with the ‘come down’ effects of stimulant drugs, such as ice, speed and ecstasy. However, doing this can cause reduced motivation, poor memory,  mental health problems and dependence on both drugs.


Giving up cannabis after using it for a long time is challenging because the body has to get used to functioning without it. Withdrawal symptoms may last for only a week, but sleep may be affected for longer. Symptoms include:

  • Anxiety, Irritability
  • Aggressive and angry behaviour
  • Cravings for cannabis
  • Loss of appetite and upset stomach
  • Sweating, chills and tremors
  • Restless sleep and nightmares

Information on withdrawal

Medicinal Cannabis 

Broadly speaking, medicinal cannabis is cannabis prescribed to relieve the symptoms of a medical condition, such as epilepsy. It is important to make the distinction between medicinal cannabis and recreational cannabis. Recreational cannabis is the form of cannabis that people use to get ‘high’. Recently legislation has been passed in Australia to facilitate access to medicinal cannabis for certain medical conditions.

Singapore views on Cannabis

Take a look at the drug criminal penalty

Cannabis is classified as a Class A drug under the Misuse of Drug Act in Singapore. Possession or consumption of cannabis;

  • Up to ten years of imprisonment or s$20,000 fine or Both

Illegal traffic, import or export of cannabis;

  • Cannabis of more than 500 grammes > May face the death penalty
  • Cannabis resin of more than 200 grammes > May face the death penalty
  • Cannabis mixture of more than 1,000 grammes > May face the death penalty
Click to see more on cannabis

Click to view on Singapore drug-related information


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