AIBU? Glandular fever can't cause psychosis!?

[Vilanelle]

looking for an extra opinion. Brother diagnosed with glandular fever several weeks ago but has now started hallucinating, talking to people in the TV, receiving imaginary phone calls.

One doctor says its part of the glandular fever, the other says its cannabis induced psychosis.

I knew he smoked weed but had no idea it was at the level where it can affect his mental health.

He is only 20 and I'm absolutely at my wits end. He has been given diazepam and hasn't slept properly for weeks. All this came on after he discovered he was the father to a little boy and the mother decided to stop him from seeing him. He has since stopped smoking cannabis and is desperate to be in his sons life but I just feel this will go against that now .

So far as I know GF does not cause psychosis.

Smoking cannabis causes psychosis in some people. The behaviour you describe sounds like psychosis and needs treating. If he hasn't slept properly for weeks, he needs a psychiatric assessment and one of the GPs involved should arrange that.

Anything can cause psychosis. I think in this situation it's impossible to know the 'cause' (also, does it really matter?). Fever can certainly cause hallucinations. I'm sure a period of illness can cause psychosis and certainly lack of sleep can. Chronic use of cannabis and life stress can too. I know have a friend who experienced a period of psychosis because of insomnia. It happened really quickly over several days. I have another friend who experienced it pretty much out of the blue for no obvious reason (no illness, no drug use, minor family stress due to an ill but distant family member, no insomnia, otherwise perfectly normal life). She was in hospital for quite a long time. But has never had it happen again. Whatever it is, it needs to be treated. Nothing will make it less likely to have a happy relationship with a child than an untreated mental health issue.

He is under a gp but there doesn't seem to be any plan in place for an assessment.

I’ve had glandular fever.... I was very sick but still 100% sane