Hi Maggie
How do we know for sure she was schizophrenic?
egap1,,,Sheila would have succumbed to schizophrenia after her imbibement of cannabis. There would have already been some sort of an " abnormality " hidden within the brain to which the cannabis itself would have triggered. Like alcoholics. Otherwise why aren't those who enjoy a drink,,,alcoholics.?
There are also those who smoke cannabis,recreationally,who aren't schizophrenics.
It's a disturbance in the brain to start with. We don't know her maternal/paternal background.
In answer to your question,,it was the main reason that Sheila had to attend hospital/clinic. Plus the medication she was taking would also tell you that she had quite a severe mental illness,,,which to a professional,,was diagnosed as paranoid schizophrenia.