Heroin: tolerance and dependence
There is evidence that after prolonged use heroin is highly addictive. People who use heroin regularly can develop dependence and tolerance to it, which means they need to take larger amounts of heroin to get the same effect.
Dependence on heroin can be psychological, physical, or both. People who are dependent on heroin 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 heroin 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 heroin and gets used to functioning with the heroin present.
Last Reviewed: 04/02/2011
Reproduced with kind permission from the Australian Drug Foundation.
Australian Drug Foundation. Heroin facts. Last updated 4 February 2011. http://www.druginfo.adf.org.au/drug-facts/heroin (accessed Jan 2013).
Cannabis: tolerance and dependence
After prolonged use, cannabis is addictive and people using cannabis regularly develop 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.
Heroin: what are the effects?
The immediate effects of heroin may last 3 to 5 hours. Find out what the long-term effects are and the effects of coming down.
Inhalants: tolerance, dependence and treatment
Tolerance can develop with regular use of inhalants. Long term use can lead to a psychological dependence.