As I can tell melatonin is forbidden for sale in EU, at least in syntetic form.Not really true, Malta is EU and syntetic melatonin is readily available from the pharmacies and even from health food shoops. No restrictions whatsoever.
Also I am pretty much sure it is available in the UK.
Well, I did my homework before I've posted this. UK & Switzerland are exceptions.
Check this out:
Supplement versions of melatonin are widely available in health food and vitamin shops in the United States for use as a sleeping aid. Melatonin is, however, not legal for sale in the European Union. Source: http://sleepapnea.inside-yourself.com/Melatonin_as_a_Sleep_Aid_br.php
Please note that the sale of DHEA or Melatonin is not available, legally in Australia or any member nations of the
European Union (excluding the United Kingdom & Switzerland). Customers must have a valid prescription in order to purchase
these products in Australia or any member nations of the European Union (excluding the United Kingdom & Switzerland). Source: http://www.thehormoneshop.com/melatonin.htm
As a natural substance with a virtual absence of problematic side effects, with health benefits to users without illnesses, melatonin has been classified as a dietary supplement and made freely available in the USA, but in the EU, over-the-counter sale without prescription is not yet officially permitted. Source: http://www.answers.com/topic/melatonin
So, something isn't right here! I've posted this, because I had similar problem with melatonin purchase here in Croatia (thought Croatia in not member of EU), but I've found good herbal source substitute.
I have no intention on debating whether or not you can buy melatonin in syntetic or animal based form, over counter or whatever. What I want is to help finding reliable source in cases when is hard to find little bottle with melatonin label on it. You can also find Melatonin in banana, rice, red wine and many Chinese plants.