Alcohol misuse and drug misuse can trigger a psychotic episode.
Drugs known to trigger psychotic episodes include:
- cocaine
- amphetamine (speed)
- methamphetamine (crystal meth)
- mephedrone (MCAT or miaow)
- MDMA (ecstasy)
- cannabis
- LSD (acid)
- psilocybins (magic mushrooms)
- ketamine
For example, levodopa, a medication that's used to treat Parkinson's disease, can sometimes cause psychotic episodes. However, any medicine that acts on the brain can cause psychosis with an overdose.
Read more at My Addicted Mind.com
Reference:
Psychosis - Causes, (2014), Causes of psychosis. Retrieved from http://www.nhs.uk/Conditions/Psychosis/Pages/Causes.aspx