One of the most prominent voices in New Zealand's medical marijuana scene has spoken out against what he describes as "woefully ill-informed" political commentary about the liberalisation of cannabis laws.

The remarks from Helius Therapeutics executive director Paul Manning come after a number of high-profile media personalities, including Mike Hosking and Duncan Garner, expressed strong opposition to the relaxation of cannabis laws in the recreational market.

Mike Hosking: Cannabis reform referendum goes up in smoke

"The recent increase in anti-cannabis sentiment has been fuelled by political commentary, a lot of which has been woefully ill-informed," says Manning.