Using cannabis can have unpredictable effects.
Some of the unwanted physical and psychological effects that may be experienced by a person when they are ‘high’ on cannabis may include:
If you are with someone who is affected by cannabis in this way, you can help.
‘Greening out’ is a term that refers to the situation where people feel sick after smoking cannabis. People can go pale and sweaty, feel dizzy, nauseous and may even start vomiting. They usually feel they have to lie down straight away.
You can assist them by:
If the person feels so sick that they start to vomit:
If someone is physically sick it is important that you never leave them on their own, not even for the shortest time. Suffocating on vomit is a very real threat and can lead to an otherwise unnecessary death.
Unwanted psychological effects can range from depression to anxiety, which can go on to produce panic attacks and paranoia. Although this can be frightening for the person, most of the time these effects can be managed through reassurance.
If someone you know experiences these problems after they have used cannabis, here are some things you can do to assist them:
If there is nothing you can do, and the person continues to feel bad or their condition gets worse, then it is important to get more help. Call 000 or take them to get medical help so that they can be treated quickly and safely.
After the effects of cannabis wear off, talk to your friend about what happened, how it affected you and those around you, and how this can be prevented in the future.
As a friend, you can do the following things that may help prevent this happening again:
For more information please see the NCPIC fast facts booklet 'concerned about someone's cannabis use? Fast facts on how to help'.
Factsheet published June 1, 2008. Updated October 1, 2011.