Mental health/unrealistic obsessions

Hi, I have question regarding my husband who has schitzophrenia.

Does anyone else find that the person really obsesses over a particular thing even though it never actually happened? My husbands fixation is very much on peadophiles, in the begining it started out as something that could have been believable but soon turned into this enourmous unrealistic things. He is obsessed with twitter, to the point where he won't put his phone down and just keeps refreshing constantly and tweeting to any politician/tv personality he can, calling them peadphiles and drug traffickers, or what ever is the focus of the day. That alone could lead to him losing his job if it was ever seen from his employer.

So I guess i am just trying to see if this happens with anyone else? If so, how do you deal with it, as i can't seem to get any help from his doctors or friends. When he gets like this he gets more and more distant to eventually the point where he won't talk to you at all anymore and the voices start putting the 'run away' ideas in his head.

Meds are also a bit of an issue, as only the "good" ones he will take, not the antipsychotics.

Thanks