Ask Dr Ozzy

'Dr' Ozzy Osbourne has had some troublesome cases to deal with recently - which would really test the mettle of your average GP - I have to say.

But this ageing rocker seems completely unfazed by whatever issues or problems people throw at him - from sleep disorders to people crashing their cars because they own a cat - Dr Ozzy seems to have the answer.

Dear Dr Ozzy

I’ve read that sleep disruption can lead to ‘multiple personality disorder’. As a stressed-out dad who hasn’t had a good night’s sleep in years, should I be worried?

Dayton, Edinburgh

Nobody wants to go to bed as John and wake up as Jim. Or worse, Jane. But from what I’m told, this is an issue for psychiatric patients who are bouncing off their padded walls, to the point where they’re hallucinating, not the average bloke who gets up a few times to use the can. And thank God for that, or there’d be 800 different Ozzys by now. I think one’s enough.

Dr Ozzy

Dear Dr Ozzy

I’ve been told that having a cat makes you 2½ times more likely to crash your car. Really?

Ted, London

Not as crazy as it sounds. According to some Czech scientist, there’s a parasite in cat litter, and if you get infected with it, your attention span goes to pieces. That’s why you’re more likely to drive into a lamppost. It’s only a problem if you get infected, though, so as long as you ain’t sprinkling cat litter onto your cornflakes, I’d say you’re okay.

Dr Ozzy

Contact Dr Ozzy at The Sunday Times by emailing: askdrozzy@sunday-times.co.uk