"[The idea that cannabis causes Schizophrenia] is ridiculous. There is often what is called a precipitating event. A precipitating event is something like an important loss of a person, a severe car accident... you know a bad alcohol trip could serve as a precipitating event too." 

– Lester Grinspoon, Professor Emeritus of Psychiatry, Harvard University (USA, 2014)

Expert opinions and anecdotal evidence suggest that cannabis is no more likely to trigger schizophrenia in those who are going to develop it anyway than any major life event or drug. Any such precipitating event can bring on a psychosis which may eventually lead to a diagnosis of schizophrenia.

You can read an article about this issue which reports about a 2013 study from Harvard University published in the journal Schizophrenia Research which concluded that:

"Cannabis does not cause psychosis by itself. In genetically vulnerable individuals, while cannabis may modify the illness onset, severity and outcome, there is no evidence from this study that it can cause the psychosis."

Anecdotal evidence indicates that cannabis actually treats psychotic symptoms so that sufferers can feel normal again. Wouldn't you rather your underlying condition was triggered by something that actually treats your emerging symptoms, thereby softening what could otherwise have been a terribly traumatic experience. 

By using cannabis some patients report being able to avoiding any repeat occurrences of psychosis, thereby avoiding the schizophrenia diagnosis that is all too often life-wrecking in itself. 

"The results of the current study suggest that having an increased familial morbid risk for schizophrenia may be the underlying basis for schizophrenia in cannabis users and not cannabis use by itself."

A controlled family study of cannabis users with and without psychosis. Proal AC, et al (2014)

The consequences of psychosis and schizophrenia diagnoses are terrible, including being drugged with zombie meds that pharmaceutical companies push like crack cocaine for enormous profits, seemingly at the expense of many patients' phsysical and/or mental health.

Many patients therefore pretend to take the drugs while secretly discarding them due to the unwanted effects and unacceptable side effects. Many patients actively deceive their doctors into thinking that they are completely fine and usng the medications. Many refuse to ask for help if their symptoms worsen for fear of being force-medicated.

Many of these truly downtrodden, most vulnerable members of society find that they are able to live relatively normal lives by using cannabis to control their symptoms. These people have been crippled by society enough already. Why would any sane person deny psychotic and schizophrenic patients of a medicine that works so well to control symptoms that they actually choose to take it and often need no further treatment?

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