What happens when you mix cannabis and tobacco?

Why people mix cannabis and nicotine

Mixing tobacco or nicotine products in with your weed isn’t a new practice. Stoners have been mixing  cannabis and tobacco for decades. Rolling herbal spliffs in rolling paper, and using tobacco wraps to make blunts. In scientific studies, this is sometimes referred to as mulling.

Tobacco and cannabis are two of the most widely consumed substances in the world. There is significant overlap in their use. Some people enjoy combining both into one paper while others light up one immediately after the other. Some 90% of cannabis consumers report being cigarette smokers at some point, compared to just 47% of non-cannabis consumers.

Tobacco can be mixed in with cannabis to stave off nicotine withdrawals in smokers. Or simply to create an intoxicating experience that many argue differs from either substance alone.

Cannabis and tobacco are both psychoactive substances, producing an effect in the brain. Both are chemicals released by the body to help cell communication. Known as neurotransmitters that interact with receptors within our bodies and nervous system. Nicotine specifically triggers specific acetylcholine receptors, which are densely located in the same parts of the brain as the endocannabinoid system’s CB1 receptors.  As the master regulatory system, it is hypothesized that the endocannabinoid system is intertwined and interconnected with the parts of the brain that respond to nicotine in tobacco.

Weed and nicotine have a few overlapping effects. Both are relied on to help with stress and anxiety. And their differing effects may be complementary. Nicotine is known to improve cognition, which is opposite of THC’s effect. There is some evidence combining the two may reduce the brain fog from THC.

Altered effects of cannabis

Smoking the two substances together may reduce the intoxicating feelings of THC. A small study of 24 participants found that joints produced stronger feelings of self-reported intoxication than blunts did. Researchers noted that blunts had higher carbon monoxide levels, which may create a delayed intoxication effect.

However, the opposite may also be true. A self-reported survey of 112 participants identified that “lifetime sequential co-use practices and more frequent nicotine vaping were associated with enhancing the intoxicating effects of cannabis.”

May increase cannabis consumption

Using nicotine in conjunction with cannabis may increase cannabis consumption (but not nicotine consumption).

A preclinical animal study concluded that nicotine may “enhance reinforcement of other drugs” and that using both nicotine and cannabis may increase cannabis use. Researchers also noted that the reinforcement-enhancing abilities of nicotine “effect occurs specifically when nicotine is administered alongside the cannabinoid. Interestingly, cannabinoid use did not promote nicotine intake. Suggesting this mechanism of reinforcement is specific to nicotine.”

Changes in connections in brain

Regular consumption of any psychoactive substance can change the connections in your brain. Interestingly, combining nicotine and cannabis may have a different effect on the brain than just consuming one or the other.

A 2019 study found that nicotine and cannabis have “interactive effects” on the brain and that the combination of the two “can produce effects that differ from the sum of the drugs’ individual effects.” Researchers took brain images of cannabis users, nicotine users, combination users, and non-users. They found that while individual users of cannabis or nicotine had reduced connectivity in certain networks, users of both substances had connections “comparable to nonusers in all networks.” In other words, it may be the balancing effects of consuming both nicotine and THC that leads so many cannabis smokers to also use tobacco.

Nicotine and the endocannabinoid system

Nicotine also interacts with the endocannabinoid system. A 2008 study found that “endocannabinoids play a role in the rewarding properties of nicotine as well as nicotine dependence liability.” Researchers identified that by blocking the enzyme fatty acid amide hydrolase (FAAH), which is responsible for breaking down anandamide, they could increase nicotine-seeking behavior in mice. In other words, researchers have identified the endocannabinoid system as playing an important role in regulating addicting effects of nicotine.

Recent studies have identified the endocannabinoid receptor CB1 as playing an important role in the reinforcing effects of nicotine. Some animal studies have tested CB1 antagonists (blockers) to reduce self-administered nicotine consumption. These antagonists are blockers of the same site that anandamide activates in the ECS, and when these blockers are given addictive behavior is less prevalent.

Research has consistently found that the CB1 receptor is important in addictive behaviors, especially nicotine. A 2015 study found that “CB1 receptors are critically involved in mediating nicotine reward/reinforcement…[and] also seem to be involved in mediating cue and nicotine priming reinstatement of nicotine-seeking behavior.”

The mechanisms of the CB2 receptor are less clear, with some studies pointing to no role in nicotine’s effects and others suggesting the opposite. Overall there is reason to believe that CB2 may be related to other addictions, but play very little role in nicotine addiction. The authors of the 2021 review concluded that there is “an important role for the endogenous cannabinoid system in the modulation of the addictive properties of nicotine.”

Increased risks of combining nicotine and cannabis

Lung cancer

While the link between nicotine and lung cancer is straightforward, the correlation is not direct for cannabis. Cannabis smoke does contain many of the same carcinogens as nicotine smoke, but does not have a direct link to cancer, including lung and throat.

Smoking nicotine and cannabis together is also associated with increased risks. While cannabis has cannabinoids that show anti-cancer properties in preclinical trials, these do not cancel out the properties of nicotine that can promote cancer cell growth.

However, frequent cannabis use is linked with chronic coughing as well as bronchitis, and combining cannabis and nicotine has a markedly elevated risk of respiratory distress, compared with cannabis use or tobacco use alone. The risk of lung cancer is elevated for people who smoke both cannabis and nicotine.

Throat cancer

Like lung cancer, there is no clear association between cannabis and throat cancer. While nicotine has a clear correlation to many cancers, including the throat, the same is not true with cannabis. However, this risk factor changes when the substances are combined.

Chronic cannabis use is linked to many health issues, and there is only a small reduction in carcinogens for inhaled cannabis smoke compared to nicotine. Despite the exposure to carcinogen in cannabis smoke, smoking cannabis alone (without tobacco) does not appear to increase the risk of throat cancer. This is likely because nicotine in tobacco smoke affects cells in the body very differently than THC from cannabis smoke.

Cardiovascular disease

It is estimated that nearly two million people die from heart disease every year caused directly from tobacco. Cannabis is much safer than this. However, it is not without its own heart risks. THC is known to increase heart rate and has been associated with abnormal heart rhythms, and there are even a few reports of strokes immediately following cannabis consumption.

The concerns really compound when cannabis is regularly combined with tobacco. Because THC can alter the way the heart beats, and the toxins in tobacco smoke can seriously stress the heart, smoking both cannabis and tobacco together is likely to stress the heart more than either alone.


Both nicotine and THC can be addicting. Both lead to a change in dopamine activity in the reward circuitry of the brain. This jolt of dopamine is short lived, and can create a “need” to consume again in order to feel happy, euphoric, or even pleasant. As is the case, people can build a tolerance to both substances. This increases the necessary amount consumed to get the desired effects. This in turn increases the frequency of consumption, as well as the amount.

Of course, like all things, addiction occurs on a spectrum. While both cannabis and tobacco may both have addictive properties – only one of these substances is seriously harming people who consume it regularly. It is also important to consider that nicotine is the primary addicting chemical in tobacco. Most of the harms identified thus far from smoking appear to be related to toxins in found in the smoke and not the nicotine, per se.

Can cannabis help you quit smoking?

While smoking high-THC (type I) cannabis has been associated with more tobacco smoking, CBD and other phytocannabinoids may hold benefits in combating addiction. In rodent trials, CBD blocked nicotine withdrawal symptoms, suggesting have the potential to make quitting easier. There are also some preclinical animal studies that THCV (specifically delta-8 THCV) may play a role in reducing cravings and preventing nicotine withdrawal when stopped.

Additionally in certain parts of the world like Switzerland, low-THC cannabis (Type III) is commonly being marketed as a smoking cessation aid or substitute. Given the dangers of smoking tobacco, this would be a step in the right direction for most smokers. However at this time it appears most of the hemp cigarette smokers continue to also co-smoke tobacco. Essentially defeating the purpose.

Bottom line on cannabis and nicotine

Combining weed and nicotine, while common, is not recommended. The two substances together create a unique experience. Which may even help to keep balance in the brain. However, consuming tobacco is known to carry serious risks of cancer and lung disease. For that reason is not recommended for regular use, with or without cannabis.


Until next time…

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