The popular narcotic drink, kava, doesn't always mix with modern-day activities like driving - and its increased consumption by followers of teetotal religions is cause for conflict.
By Daniela Maoate-Cox
Clap once, down a coconut shell of muddy water, then clap three times and pass on the shell while your tongue slowly numbs...
Kava is a popular drink consumed in Pacific countries such as Fiji, Tonga, and Vanuatu, with variations on the ceremony surrounding its consumption.
But, in recent times, the narcotic's popularity outside the islands has grown and, with it, questions about how kava drinking mixes with contemporary life - in particular, driving.
Dr Apo Aporosa is a post-doctoral research fellow at the University of Waikato and a former police officer of Fijian ancestry. He is investigating the effects of kava on driving ability.
"I regularly drink kava and drive. There's only been one or two occasions where I've questioned whether or not I should be driving," he says. "It's a big unknown."
Kava is a narcotic that results in the user feeling relaxed. It is made from the root of the piper methysticum plant, which is dried, ground into a powder and mixed with water in a tanoa, or wooden bowl.
The police are reporting increasing numbers of 'kava-intoxicated' drivers, Dr Aporosa says - and he has heard anecdotally from people who say they have reversed into a gate or travelled at a slow speed after drinking it.
"The other issue about that, hopefully I don't sound like I'm sitting here making excuses for kava," he says, " is we spend a lot of hours drinking kava."
Dr Aporosa and his mates might participate in three to four sessions a week on consecutive nights until about 2am, he says.
"Then some of those people are getting up and going to work at six. So let's take kava out of the equation. You're really tired and then you're driving, so I think some of it is tied into ."
Between 20,000 and 25,000 people are estimated to be drinking kava throughout New Zealand every Friday and Saturday night. It's not known exactly how many drive off afterwards, but Dr Aporosa says research suggests about 70 percent of users use motor vehicles after drinking sessions.
"There is a standard set by the pharmacological industry that says you should not consume any more than 300 milligrams of kava per day - that's kavalactone, the active ingredient inside kava - but on an average Friday night I'd probably consume 20,000 milligrams," Dr Aporosa says.
Kava has a different effect to alcohol, and Dr Aporosa says he's not overly concerned about driving after drinking it…
Go to this episode on rnz.co.nz for more details