When the subject of harm reduction for drug users comes up, most people tend to think of the issue in terms of so-called “hard” drug use — distributing clean syringes to injectors, providing information on avoiding overdose to heroin users, educating people about the dangers of mixing pills with alcohol, operating methadone maintenance programs, etc.
But in recent years, many researchers and drug educators have begun to look into harm reduction for what is often considered the most benign of illicit drugs — cannabis.
While there has been some research which has linked cannabis use with psychotic episodes in people with a predisposition to schizophrenia, the major harms associated with cannabis use are cardiovascular and bronchial. Simply put, smoking anything is harmful to the lungs, throat and heart. But how you smoke your cannabis can have a large influence on how much harm you do to these areas of the body.
Mixes
While it is common in Australia to mull up cannabis with tobacco, doing
so increases the potential health risks, as the smoker ingests more tar
and other harmful carcinogens. Although many smokers may mix their cannabis
with tobacco to make it last longer, doing so means you will take in more
toxic compounds in the smoke to reach the desired effect. Also, it may be
harder to reduce or stop smoking if you mix tobacco with cannabis as you
may experience nicotine withdrawal.
Some people mull their cannabis with herbal preparations in the belief that
this is less harmful than mixing with tobacco. Doing so will reduce the
risk of nicotine withdrawal if you stop smoking, but there is no evidence
that these mixes are better for your health [and it is likely that they
are more harmful - Ed].
Smoking methods
There is a great deal of debate about which methods of smoking cannabis (joints, pipes, bongs, etc.) are the least harmful for your health. A lot of this debate focuses on which method provides the best ratio of THC (cannabis’ active ingredient) to tar. While there is no consensus among experts about which method is best for your health, there are some things you can do to reduce the harm to your body regardless of which method you prefer.
Joints
Most experts agree that smoking cannabis in joints is one of the least harmful ways to use the drug. To maximise the ratio of THC to tar and carcinogens, it is recommended that you do not use cigarette filters in joints as they eliminate up to 60% of the THC in the smoke, leaving you with a much higher proportion of tar and other toxic substances in the smoke. Instead, smoke unfiltered joints or use rolled pieces of unbleached cardboard in the end of the joint.
Bongs
While many people prefer to smoke cannabis in bongs because the cooler smoke doesn’t feel as harsh on the lungs, recent research suggests that using a bong may be one of the most harmful methods of smoking cannabis. The water in a bong absorbs a great deal of the THC in the smoke, thus increasing the amount of tar the smoker must ingest to get the desired amount of THC. Also, using a bong which has a mouthpiece less than 20cm from the water level can allow water vapour and water drops to enter the lungs.
If you do use a bong, it is recommended that you do not use one made of plastic bottles, rubber hose or with an aluminum cone, as these materials can give off harmful fumes when heated or melted. It is best to keep your bong clean and change the water frequently too, as a dirty bong can harbour germs and viruses like Hepatitis A.
Pipes
If you use a pipe, it is best to choose one made of glass, stainless steel or brass, as wooden or plastic pipes can give off noxious fumes when you burn cannabis in them.
Stronger if you hold your breath?
Among many cannabis smokers the conventional wisdom is that holding in an inhalation of smoke increases the effects felt, but the consensus among experts is that this is not the case, and in fact holding in the inhalation causes more harm to the lungs without increasing the amount of THC absorbed.
Studies indicate that 95% of the THC in cannabis smoke is absorbed in the first few seconds of inhaling, so holding in the smoke any longer just allows more tar and other noxious chemicals to be absorbed by the lungs. It is better to take small, shallow puffs rather than deep inhalations.
Eating cannabis
One of the best ways to avoid the harmful effects of cannabis smoke on the lungs is to cook your cannabis in cookies or cakes and eat it rather than smoke it. The main drawback of this, however, is that it can be harder to gauge how much you have taken in, as the effects of eating cannabis can take anywhere from 60-90 minutes to hit and can last from 4-12 hours. People who eat cannabis often report the buzz is stronger and trippier than when the drug is smoked. It is best to use caution when eating cannabis and to wait a few hours before eating any more.
Hydro versus bush
Much debate has raged about the merits of hydroponically grown indoor cannabis versus naturally grown “bush” cannabis. The main difference between the two varieties is the THC content of the cannabis, with indoor grown buds reaching a THC content of 13-20% THC, compared to 7-14% THC content for outdoor plants. While some people point to the high THC content of hydroponic cannabis as a factor in the onset of psychological problems, others emphasise the harm reduction benefit of hydroponic cannabis in that the user needs to smoke less to reach the desired effect. If you are unused to smoking strong hydroponic cannabis it is probably best to go easy on it until you are familiar with your tolerance.
Bacteria on cannabis
During the handling and curing of cannabis plants, it is possible for fungi and bacteria to contaminate the cannabis. This poses a low-level risk for most smokers, but for those with compromised immune systems (such as those with HIV/AIDS or cancer) it can be a serious health hazard. The best way to handle this is to heat your cannabis in an oven heated to 66-93 degrees Celsius for about 10 minutes to kill any fungi or bacteria.
Quitting cannabis use
If you are trying to cut down or stop smoking cannabis, many drug and alcohol agencies have started quit smoking groups to assist people with managing their cannabis use. These groups usually hold weekly sessions where you can discuss quitting methods, coping mechanisms and relapse prevention with other people who are trying to quit or cut down on smoking cannabis.
References
The information in this article was compiled from the following sources:
• Mulling it Over: Health Information for People Who Use Cannabis;
Annie Bleeker and Annie Malcolm, Manly Drug Education and Counselling Centre,
January 1998
• Multidisciplinary Association for Psychedelic Studies Newsletter,
Volume 6, Number 3, Summer 1996.
As a final note, cannabis smokers who have hepatitis C should be aware that
new research shows that regular daily smoking of cannabis can increase liver
damage.
