As many of the posters here seem to have some experience of dealing with depression, perhaps you could advise me. I have a friend who has become totally paranoid. He thinks he's being followed by police and customs squads.According to him they've taken over his neighbours house and mounted surveilence cameras on him.He's got to the state where he has thrown me and another friend(seperately ) ouy of his house for broaching the subject.There is no reason why he should be under observation, his family (he lives alone)have made inquiries with the authorities who say that he is "not known to them ". Yet he just will not believe them and gets worse. He has suffered a bereavement in the last 12 months. Is this depression? and how do you get someone to go to a doctor if they believe there's nothing wrong and that they are being followed and under 24 hour observation. Sorry for going on and invading another thread but I'm very worried about my mate.