Hellraising rocker Ozzy Osbourne is fed up of relying on medication for depression - because it has killed his sex life with wife SHARON. The former Black Sabbath frontman, who insists the reality TV couple were "like rabbits" when they first married, now confesses even four Viagra tablets can't counter the effects of his anti-depressants. But although he'd like rekindle the passion, Ozzy isn't confident he can give up his prescription pills. He says, "I can't do it (sex). I'm on anti-depressants. I take four Viagra and it doesn't work - it doesn't do anything. "If I get off anti-depressants I go mad."