The changes aim to save patients around £165 a year in clinic fees.
Opioid use was seen to reduce or stop altogether, following prescription of medical cannabis.
Consuming medical cannabis helped to reduce sleep disturbances, nightmares and early awakenings.
The move aims to further reduce cost-related barriers to medical cannabis prescriptions.
The treatment improved quality of life and reduced behavioural psychological symptoms in patients.
With doctors receiving no formal training in medical cannabis, how can we prevent the same happening in the UK?
Researchers in the UK are hoping to fund a major health economic study.
Patients prescribed cannabis for severe epilepsy will now have access to a UK supply of the Dutch oils.
A former police officer has shared cannabis has helped him reclaim his life after a diagnosis of PTSD
Until now, Sativex has been approved for use on the NHS in England, Wales and Northern Ireland, but not in Scotland.