The European Parliament is calling for an EU-wide policy for medical cannabis and properly funded scientific research.

Several EU countries have legalised the medical use of some form of cannabis or cannabinoids or are considering changes to their legislation.

However, the rules on which products are allowed and how they should be used vary widely, although no EU country authorises the smoking or home-growing of cannabis for medical purposes.

While the World Health Organization has officially recommended that the cannabis compound cannabidiol (CBD) should not be classified as a controlled substance, there are no EU-wide rules at the moment for either the medical or recreational use of cannabis.