In 2010 I reported on a study looking for links between cannabis and the development of psychosis and bipolar. And back in 2005 a Dutch study found that marijuana use doubled the risk of developing schizophrenia.
Since both bipolar depression and mania can have psychotic features, there is at least some evidence that even medical marijuana use might increase the likelihood of hallucinations and delusions.
As McManamy says, substance abuse is quite prevalent among those with bipolar disorder. People have used alcohol and drugs to try to control their systems in great numbers. When the "cure" is the disease, it's called dual diagnosis.
What do you think?
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