Hi Countrygirl,
I'm from Australia and over here, you can buy it over the counter - heaps of health shops sell it - but you don't really know what you're getting.
I started with 0.5mg and slowly built up from there to the right dose for me. Everyone is different.
There's a medically approved version called 'Circadin' which is slow release, but it only comes in 2mg and is very expensive, especially if you need more.
I take 4 mg every night, prescribed by my doctor and I have it made up by a compounding chemist. It's slow release. I take it half an hour before bed and by the time I'm ready to sleep it starts working.