Last published: July 16, 2021
What is synthetic cannabis?
Synthetic cannabis is a New Psychoactive Substance (NPS) that was originally designed to mimic or produce similar effects to cannabis and has been sold online since 2004. However, some of the newer substances claiming to be synthetic cannabis do not actually mimic the effects of THC (delta-9 tetrahydrocannabinol, the active ingredient in cannabis).
Reports suggest it also produces additional negative effects. These powdered chemicals are mixed with solvents and added to herbs and sold in colourful, branded packets. The chemicals usually vary from batch to batch as manufacturers try to stay ahead of the law, so different packets can produce different effects even if the name and branding on the package looks the same.
Synthetic cannabis is marketed under different brand names.
Spice was the earliest in a series of synthetic cannabis products sold in many European countries. Since then a number of similar products have been developed, such as Kronic, Northern Lights, Mojo, Lightning Gold, Blue Lotus and Godfather.
Synthetic cannabis is also marketed as aphrodisiac tea, herbal incense and potpourri.
How is it used?
It’s most commonly smoked and is sometimes drunk as a tea.
Effects of synthetic cannabis
There is no safe level of drug use. Use of any drug always carries some risk. It’s important to be careful when taking any type of drug.
Synthetic cannabis affects everyone differently, based on:
- size, weight and health
- whether the person is used to taking it
- whether other drugs are taken around the same time
- the amount taken
- the chemical that is used and its strength (varies from batch to batch).
Synthetic cannabis is relatively new, so there is limited information available about its short- and long-term effects, including how safe or unsafe it is to use. However, it has been reported to have similar effects to cannabis along with some additional negative and potentially more harmful ones including:
- fast and irregular heartbeat
- racing thoughts
- agitation, anxiety and paranoia
- aggressive and violent behaviour
- chest pain
- acute kidney injury
There has been limited research into synthetic cannabis dependence. However, anecdotal evidence suggests that long term, regular use can cause tolerance and dependence.2
Giving up synthetic cannabis after using it for a long time is challenging because the body has to get used to functioning without it.
It has been reported that some people who use synthetic cannabis heavily on a regular basis may experience withdrawal symptoms when they try to stop, including:
- panic attacks
- agitation and irritability
- mood swings
- rapid heartbeat.1,2,7
The risk of tolerance and dependence on synthetic cannabis and their associated effects may be reduced by taking regular breaks from smoking the drug and avoiding using a lot of it at once.6
Health and safety
There is no safe way to use synthetic cannabis. If you do decide to use the drug, it’s important to consider the following points.
- It is difficult to predict the strength and effects of synthetic cannabis (even if it has been taken before) as its strength varies from batch to batch.
- Trying a very small dose first (less than the size of a match head) could help gauge the strength and possible effects. Dose size should only be increased slowly – time should be given for the previous dose to wear off.
- Taking synthetic cannabis on its own without a ‘mixer’ such as tobacco or dried parsley should always be avoided. Similarly, inhaling the drug via bongs or pipes can increase the risk of an overdose or bad reaction.6
- The packaging of synthetic cannabis can be misleading. Although contents may be described as ‘herbal’, the actual psychoactive material is synthetic.
- Not all ingredients or their correct amounts might be listed, which can increase the risk of overdose.
- Chemicals usually vary from batch to batch, so different packets can produce different effects, even if the packaging looks the same.6
Mental health risks
- People with mental health conditions or a family history of these conditions should avoid using synthetic cannabis. The drug can intensify the symptoms of anxiety and paranoia.
- Taking synthetic cannabis in a familiar environment in the company of people who are known and trusted may alleviate any unpleasant emotional effects. Anxiety can be counteracted by taking deep, regular breaths while sitting down.6
When it absolutely shouldn’t be used
Use of synthetic cannabis is likely to be more dangerous when:
- taken in combination with alcohol or other drugs, particularly stimulants such as crystal methamphetamine (‘ice’) or ecstasy
- driving or operating heavy machinery
- judgment or motor coordination is required
- alone (in case medical assistance is required)
- the person has a mental health problem
- the person has an existing heart problem.6
In an emergency
There have been a number of deaths caused by synthetic cannabis. Call triple zero (000) immediately if someone is experiencing negative effects such as:
- fast/irregular heart rate
- chest pain
- breathing difficulties
- delusional behaviour.
Ambulance officers don’t have to involve the police.
The laws surrounding new psychoactive substances (NPS) are complex, constantly changing and differ between states/territories, but in general they are increasingly becoming stronger.
In Queensland, New South Wales, South Australia and Victoria there is now a ‘blanket ban’ on possessing or selling any substance that has a psychoactive effect other than alcohol, tobacco and food.
In other states and territories in Australia specific NPS substances are banned and new ones are regularly added to the list. This means that a drug that was legal to sell or possess today, may be illegal tomorrow. The substances banned differ between these states/territories.
See also, drugs and the law.
- 2.8% of Australians aged 14 years and over have used synthetic cannabis at some stage in their lives.9
- 0.3% of Australians aged 14 years and over have used synthetic cannabis in the previous 12 months.9
According to Australian data from the Global Drug Survey, synthetic cannabis was the 33rd most commonly used drug – 1.1% of respondents had used this type of drug in the last 12 months.8
- Barratt, M. J. (2012). Kronic appeal: Patterns of synthetic cannabinoid use in Australia. Yarra Drug and Health Forum, Melbourne.
- Zawilska, J., & Wojcieszak, J. (2014). Spice/K2 drugs – more than innocent substitutes for marijuana. International Journal of Neuropsychopharmacology, 17, 509-525.
- DeLotto Baier A. (2013). Case studies of USF Health neurologists link smoking “spice” with stroke in healthy, young adults.
- Centers for Disease Control and Prevention. (2013). Notes from the field: Severe illness associated with reported use of synthetic marijuana.
- Center for Disease Control and Prevention. (2013). Acute kidney injury associated with synthetic cannabinoid Use — multiple states, 2012.
- KFx Drugs Consultancy (n.d.) Drug facts: Synthetic cannabinoids
- MacFarlane, V. & Grant, C. (2015). Synthetic cannabinoid withdrawal: A new demand on detoxification services. Drug and Alcohol Review, 34, 147-153.
- Global Drug Survey. (2014). Last 12 month prevalence of top 20 drugs. [PDF:249KB] London: Global Drug Survey.
- Australian Institute of Health and Welfare. (2014). National Drug Strategy Household Survey detailed report 2016. Canberra: AIHW.