Doctors are welcoming an inquiry into the prescriptions of medicinal cannabis clinics

The Medical Council's leading the investigation following patient complaints they weren't properly briefed on non-cannabis options at the clinics.

It also included instances of patients not being fully informed about the ongoing costs and side-effects of cannabis.

The Royal College of GPs Medical Director Luke Bradford says the regulation for the clinics is overdue.

He says medicinal cannabis should only be used once other options have been trialled but that hasn't been the case.