How can I legally experience the high of opium just once in my life?

I’ve always wondered what the opium high feels like. I have absolutely no interest in experiencing heroin, or crack, or crystal meth or any of the other highly addictive drugs out there. But before I die, I’d love to just zone out one time on a nice big—but completely safe—dose of opium.

The desire has become much stronger since my lead character in my next book is going to be a user, and it is really difficult to know what’s going on inside his head when he’s on it just by reading first-person accounts from other users and addicts.

Can a doctor or psychiatrist give me a prescription for a single dose, or is there some place I can go where it is legal to try it out yet a safe place to visit? Or is breaking the law the only way to get there?