Cannabis: tolerance and dependence
Tolerance and dependence
There is evidence that after prolonged use cannabis is addictive. People who use cannabis regularly can develop dependence and tolerance to it, which means they need to take larger amounts of cannabis to get the same effect.
Dependence on cannabis can be psychological, physical, or both. People who are dependent on cannabis find that using the drug becomes far more important than other activities in their life. They crave the drug and find it very difficult to stop using it. People who are psychologically dependent on cannabis may find they feel an urge to use it when they are in specific surroundings or socialising with friends. Physical dependence occurs when a person’s body adapts to cannabis and gets used to functioning with the cannabis present.
Last Reviewed: 25/01/2012
Reproduced with kind permission from the Australian Drug Foundation.
Australian Drug Foundation. Cannabis Facts. Last updated 25 Jan 2012. http://www.druginfo.adf.org.au/drug-facts/cannabis (accessed Jan 2013).
Heroin: tolerance and dependence
Prolonged use of heroin is highly addictive. Using heroin regularly can result in dependence and tolerance to it.
Cocaine: tolerance and dependence
After prolonged use, cocaine is highly addictive and with regular use, larger amounts of cocaine are needed to get the same effect.
Amphetamines (speed): tolerance and dependence
Amphetamines become highly addictive after prolonged use. Dependence on amphetamines can be psychological or physical, or both.
Using GHB carries a high risk of overdose due to the small difference between the amount required to produce a 'high' and that which causes overdose.
Inhalants: tolerance, dependence and treatment
Tolerance can develop with regular use of inhalants. Long term use can lead to a psychological dependence.