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Cannabis affects everyone differently. Different strains and methods of consumption give users different effects. And new users generally feel different effects than more experienced users.
Effects can vary — some people don’t feel anything at all the first time they try cannabis. For the most part, the experience tends to be kind of relaxing and a little euphoric. Some people can become more outgoing and social. However, others find cannabis makes them tired, anxious or even paranoid.
It is very important to proceed with consuming medical cannabis cautiously and with respect for its efficacy – start slow with a low dosage and see how it affects you. Keep track of your dosing, type of product and the feelings that it provided – this will help you better understand how cannabis can best work for you.
The short-term effects of cannabis begin only minutes after the flowers of the plant (called “bud”) are smoked or vaporized (“vaped”). If eaten, the effects are perceived about an hour after ingestion. The effect of smoked or vaped cannabis remains for one to four hours (depending on the potency of the particular cannabis), while those who consume edibles experience efficacy for longer periods of time.
Effects may include coughing, euphoria, dry mouth, red eyes, increased appetite (the “munchies”), blurred vision, delayed motor reactions, sedation, and even anxiety. As mentioned, psychoactive effects decrease with continued use (tolerance building). However, in the vast majority of cases, side effects are minimal and can be controlled with dose management (titration).
Although rare, some patients who consume too much cannabis, especially in edible form, sometimes experience temporary anxiety attacks, convulsions, and other negative psychological reactions.
Due to its psychoactive properties, there are concerns with the effects of long-term use of cannabis. Although raw flower cannabis is a strictly-prohibited substance at the federal level, with little research and no human trials, the FDA has approved synthetic versions of THC, the primary cannabinoid that delivers both euphoria and medical efficacy. Unlike raw cannabis, which is classified as a Schedule I substance (the most strict drug classification), these derivations of the plant are categorized as Schedule III substances because they are deemed less likely to produce addiction in users.
In 1999, the Institute of Medicine determined that concerns over long-term use of cannabis should be categorized as 1) the effects of consuming whole-plant cannabis and 2) the results of consumption of THC only.
Cannabis has been determined to be one of the safest substances consumed by humans. Thousands of years of anecdotal reports and mounting research evidence has shown that it is impossible to overdose on the substance. Those unfamiliar with its use, however, should understand possible side effects before using the plant (or one of its extracts or concentrates) to treat medical conditions or obtain a euphoric “high.”
Uneasiness: Although cannabis consumers typically gain a feeling of comfort and ease—with millions using it to treat anxiety—some experience heightened feelings of anxiety, especially with sativa strains. Strategies for dealing with this include consumption in a safe, familiar environment and eating food. Those who suffer such reactions should purposefully reduce the amount consumed during subsequent sessions. Social stigma and illegality also contribute to the stress experienced by some who consume cannabis.
Hunger and Thirst: Cannabis is infamous for stimulating appetite and giving users “the munchies.” Users are encouraged to eat and drink healthy foods instead of sugary junk food. Indica strains are responsible for an increase in appetite, whereas sativa varieties can actually reduce appetite and possibly be an effective treatment for conditions involving obesity or overeating.
Red Eye: Cannabis users often experienced a redness of the eyes that is a standard symptom of consumption of the herb. Those concerned that they might be detected should employ eye drops or wear sunglasses.
Drowsiness: Just as indica strains of cannabis increase appetite, they often also produce drowsiness (often labeled “couchlock”). Sativa strains produce the opposite effect and result in an energetic, productive high. For this reason, sativa strains are recommended in the morning or midday, while indica types are best for evening and night use.
Sleeplessness: Some hybrid and sativa strains of marijuana can produce sleeplessness. If possible, users should understand the type being consumed and the best time of day for use. In a perfect world, patients would possess both indica and sativa strains, giving them the ability to medicate with the variety that is best for their particular situation and time of day.
Short-term Memory Loss: Depending on the type and strength of cannabis being consumed, some users may experience short-term memory loss, confusion, or an inability to perform complex tasks requiring focus. For this reason, patients should be familiar with the strength and effects of a particular strain and strive to consume only when appropriate.
Euphoria: Nearly all cannabis users report relatively strong feelings of euphoria and being “high” after consumption. Often, situations that normally would elicit no reaction are perceived as humorous or even hilarious. If this type of response might be inappropriate, such as during work hours or when associating with those who might disapprove of the consumption of marijuana, users should avoid consumption until it is safe and acceptable to do so.
Smoke of any type, from any substance, contains several of the same unhealthy chemicals also delivered by tobacco smoke. Some believe that cannabis smoke, like that of tobacco, may increase users’ risk of lung cancer and respiratory diseases. Fortunately for patients consuming cannabis, research has revealed that smoked marijuana produces almost none of the same risks as smoked tobacco.
Studies have revealed that heavy, long-term use may produce bronchitis in users, including a chronic cough (similar to heavy tobacco smokers). Chronic consumers of large quantities of cannabis should consider alternative means of consumption, including edibles and vaporizing.
While some have assumed that smoking cannabis for an extended period of time could increase the risk for lung cancer, in much the same way it does for tobacco, while more research is clearly required, studies to date have not confirmed this negative connection. Consumption of cannabis, smoked or otherwise, has actually been shown to prevent or reduce cancer. Thus, even though cannabis smoke contains some of the same cancer-causing compounds found in tobacco smoke, the efficacy of cannabinoids in marijuana can possibly negate these effects, preventing tumors from forming.
A five-year investigative study was released in 2006 which revealed that even heavy smoking of cannabis does not lead to lung cancer or other types of the disease. The study reported that cannabis may offer compounds (cannabinoids) that control aging cells, preventing them from becoming cancerous.
Other studies have also found that cannabis smokers do not experience an increase in Obstructive Pulmonary Disease, an ailment that is common in heavy tobacco smokers.
Regular or heavy use of cannabis can affect cognition (mental function), especially short-term memory, attention span, and concentration. A 2003 analysis of 15 studies of the effects of cannabis reported:
“There might be decrements in the ability to learn and remember new information in chronic users,” but that “other cognitive abilities are unaffected.”
When used heavily, cannabis sometimes produces psychomotor impairment characterized by body sway, lack of steadiness in the hands, loss of driving skills and coordination, and a decrease in the ability to focus. These effects tend to be temporary (two to four hours) and do not persist during lack of consumption. These potentially negative effects are actually stronger in those who consume less or are new to the use of cannabis. Prolonged use also seems to enable users to develop compensatory skills as they acclimate to the effects of the herb.
Although research on this topic has shown mixed results, cannabis—and the cannabinoids within—have been shown to have a beneficial effect on the body’s immune system. Specialized receptors within the human body (part of something called the endocannabinoid system) have been identified that work in perfect harmony with cannabinoids. All mammals (not just humans) have an endocannabinoid system. This is why cannabis research on animal subjects has yielded relevant research results. Most of these cannabinoid receptors are located in the nervous system (brain, spinal cord, and nerves throughout the body) and immune system, including various organs and tissues.
Some cannabis-centric pharmaceutical companies have developed synthetic cannabinoids and specialized extracts of the whole plant that target these receptors to produce immunosuppressive qualities which may be beneficial to patients suffering from multiple sclerosis, arthritis, HIV/AIDS, and related autoimmune diseases.
In 2012, a study was published that showed cannabinoids actually strengthen the function of the immune system. The study concluded that activation of the specialized receptors of the endocannabinoid system actually has an antiviral effect and showed a reduction in HIV infection rates of 50 percent. Researchers surmised that cannabinoids likely prevent diseased cells from spreading their disease to healthy cells. Other studies involving animals have revealed that cannabinoids reduce viral load, thus helping users more readily heal and fight their disease—or, at a minimum, that they reduce negative symptoms of the disease.
Just like any product that has a physiological effect on the human body, you can over-indulge. Similar in the way you can have too much caffeine or you can have too much alcohol, you can have too much cannabis.
Consuming too much cannabis will likely lead to a few unpleasant hours, however, unlike other commonly prescribed medicine for treating pain and other conditions approved for this program, it is highly unlikely that an otherwise healthy individual would experience a lethal reaction from over-consuming cannabis. This fact is principally because the cannabinoid receptors, unlike opioid receptors, are not located in the brain stem areas that control respiration and cardiovascular function. In the nearly 5,000 years that cannabis has been used by tens of millions of people for both medicinal and recreational purposes, there has not been one credible documented case of someone fatally overdosing on cannabis.
There is a test known as the LD-50 used to determine the toxicity of a product. This rating indicates at what dosage fifty percent of test animals receiving a drug will die as a result of drug induced toxicity. The LD-50 rating for aspirin is 1:20. in layman’s terms this means that if the recommended dosage of aspirin is two pills, in order to induce death, a person would need to consume 40 pills (20xs the recommended dosage). For Valium it’s 1:10 and for some cancer medications it can be as low as 1:1.5.
It was estimated that the LD-50 for cannabis would be between 1:20,000 and 1:40,000; meaning that a person would need to ingest 20,000 to 40,000 times the single serving size to induce a lethal reaction. For this study, a single serving of cannabis was measured at 9 grams of cannabis (the amount in one cannabis cigarette or joint) – a person would need to ingest 20,000 to 40,000 joints, or roughly 1,500 pounds of cannabis in 15 minutes to induce a lethal reaction. Simply put, it would take an unrealistic amount of cannabis consumption for an otherwise healthy person to experience a cannabis-induced lethal event.
But we should say it one more time, start slow and dose low – give it time and see how it affects you before deciding whether or not to ingest more.
According to toxicology, a person would have to consume nearly 1,500 pounds of marijuana in 15 minutes to induce a cannabis-driven lethal response.