Medicinal cannabis is becoming more widely available, and easier to obtain

Latest findings from Massey University's Drugs Trends Survey show a growing number of medicinal cannabis users now report their main source being a clinic or pharmacy.

Many continue to source it from family, friends or drug dealers.

But Associate Professor Marta Rychert says more than one-in-three now have a prescription.

She says this is a surprising jump from just one-in-ten in the previous survey.