With legalization a year away, experts offer tips on minimizing pot harm

There's only one way to completely avoid harm when using pot, according to Dr. Benedikt Fischer: Don't use it at all.

Butwith the federal governmentaiming to legalize marijuana by July2018, clearly not everyone in Canada is expectedto chooseabstinence.

• Legalized marijuana should be sold through Crown corporation, new report says

In fact, statistics suggest upwards of threemillionCanadians are already using the drug. So Fischerandseveral colleagueshave reviewed the scientific evidence and put together a new set of guidelines aimed atminimizingthe risks of pot use.

The guidelines, being published in the June 2017 issue of the American Journal of Public Health, were formally announced at a news conference in Ottawa today.

'Always will come with some risks'

"Let me be very clear: these are not guidelines for risk-free cannabis use. That doesn't exist. It always will come with some risks,"said Fischer,a senior scientist with Toronto'sCentre for Addiction and Mental Health and a psychiatry professor at the University of Toronto.

But those risks can be minimized, just likewith drinking or sexual activity, Fischer said.

"There's a lot of room for modification on the part of the users how they use, when they use, what they use that will influence their risk for acute and chronic health outcomes."

The guidelines have been endorsed by several major medical groups, including the Canadian Medical Association (CMA) and the Council of Chief Medical Officers of Health.

• It's best to wait

If you're not going to avoid pot altogether, Fischer said, a few of his 10 tips still stand out as being especially significant.

One is to wait until you're older to start using marijuana, particularly if you're under 16. (The federal legislation proposes a minimum legal age of 18.)

Young people are more vulnerable to physiological, psychological and behavioural problems because of pot use, he said.

"We know young people are the most vulnerable but that's also where most of the cannabis use is happening at the moment and will likely continue to happen."

Health expert recommends delaying marijuana use until older

7 years ago

Duration 1:01

Dr. Benedikt Fischer, a senior scientist with Toronto's Centre for Addiction and Mental Health and a psychiatry professor at the U of T, says marijuana use poses risks for young people.

He cites research showingthose who started using by age 14 were four times more likely to develop cannabis dependance and three times more likely to get into a car crash than those who started after 21. Research also shows associations between early use and mental-health problems such as depressive and psychotic symptoms.

• Reduce your use

"Watch and reduce your patterns of frequencyof use," said Fischer."It makes an enormous difference in acute and chronic health outcomes whether someone uses cannabis once or twice a week or daily."

That tip is backed up by scientific research showing frequency/intensity of use is associated with mental-health problems, cardiovascular problems, motor vehicle accidents and suicide.

• Don't get behind the wheel

While marijuana use will be legalized, driving high won't be. Fischer said many cannabis users underestimate the risk of an accident.

"Absolutely do not use cannabis and get into a car, and drive within less than at least sixhours of consumption."

The studies used to back up the guidelines show the risk of a crash increases anywhere from 1.3to four timesafter cannabis use. They also suggest the risk is much higher when pot is combined with alcohol.

Expert urges people not to drive for six hours after using pot

7 years ago

Duration 1:02

Dr. Benedikt Fischer, a senior scientist with Toronto's Centre for Addiction and Mental Health and a psychiatry professor at U of T, talks about avoiding marijuana impairment while driving.

• Don't smoke it

The statisticsshow that when most people use marijuana,they smoke it, but there are safer options, according to Fischer's research.

Smoking can harm your lungs and respiratory system.

"There are alternatives that are safer in certain ways but they come with other potential risks we have to be aware of. "

Edible marijuana products don't represent the same threat to your lungs but can lead to more severe impairment, said Fischer. In Colorado, where marijuana is legal, there have been serious concerns raised about adults and especially children winding up in the hospital after consuming edible marijuana products.

Canada's proposed pot legislation doesn't tackle the question of edibles. The government has said they'll be made available at a later date, once regulations to deal with them have been developed.

Ian Culbert, executive director of theCanadian Public Health Association, said there must be strict regulation and a limited range of products available initially. Edibles must have clear identification of dosage and servings, and come with education about how it takes longer to take effect than smoking.

"You eat a brownie, you don't feel anything. Well you have some more, you don't feel anything,and you have some more," he said during the news conference. "Then suddenly you're in the ER because you've overdosed on cannabis."

Using vaporizers, or "vaping," has been shown to reduce toxic intake and the risk to lungs, but Fischer's work points out that there have been no rigorous studies on the long-term effects.

Other recommendations

• Identify and choose lower-risk cannabis products, notably those with lower THClevels.
• Don't use syntheticcannabis products such as "Spice" and "K2",which can even lead to death.
• If you smoke cannabis, avoid practices like "deep inhalation" and "breath holding".
• Avoid pot altogether if you are at risk of mental-health problems or are pregnant.
• Avoidcombining risks, such asstarting young and smoking high-potency products

'Important, evidence-based information'

Federal Health Minister Jane Philpott said in a statement Health Canada would "explore further dissemination" of the guidelines when the legislation to legalize cannabis comes into effect.

She said the guidelines are "important, evidence-based information to help cannabis users reduce the health and safety risks associated with cannabis use.

"I commend the authors of the guidelines, particularly Dr. Benedikt Fischer of the Centre for Addiction and Mental Health, for their dedication to producing this valuable resource."

In an interview, the government's point man on pot, former Toronto police chief Bill Blair, went even further in his praise for the guidelines.

"I think they're excellent.

"I would never presume to speak on behalf of the government or the minister, but I know the people who have done this work. I've had the benefit of a number of different conversations with the people who have done this work. I've spoken to the CMA as well and I think thesefrankly... are long overdue."

The decisions taken by governments could go a long way towards affecting the risks associated with cannabis use, according to Fischer. For example,making sure edible marijuana products are sold in limited quantity to avoid over-consumption can make a big difference, he says, as can including warning labels.

Centre for Addiction and Mental Health released new guidelines on pot consumption

7 years ago

Duration 7:20

Former Colorado Pot Czar Andrew Freedman: Its a little bit more of a realistic take