In a 90-minute one-man show he calls "Weapons of Self-Destruction," the star of "Mrs Doubtfire" and "The Fisher King" took an irreverent look back at his immoderate youth. "They used to tell me, 'Drugs can kill you,'" he confided. "Now that I'm 58, they are saying 'Drugs can save your life,' I realise my doctor is my dealer now. He's a lot harder to get hold of."