Mixing magic mushrooms with alcohol, cannabis and other drugs: what the evidence says

People rarely use magic mushrooms in a vacuum. A drink at a party, a joint to “take the edge off”, a prescription taken every morning: all of these can end up in the same evening. This guide sets out what official Canadian sources and published studies say about combining psilocybin mushrooms with other substances, how strong each finding is, and what is still unknown.

It is harm-reduction information, not a guide to combining anything. It gives no amounts, no timing and no “safer” combinations, because no source we found supports any of those. If you take a prescription medicine, the person to ask about interactions is your prescriber or pharmacist.

What does Health Canada say about mixing magic mushrooms?

Health Canada’s page on magic mushrooms has one sentence on combinations. In our paraphrase: using magic mushrooms with substances such as cannabis, amphetamines or alcohol “elevates the risks” of serious side effects and adverse events (Health Canada, magic mushrooms; page modified 20 October 2026). The page does not say which side effects each combination brings, and it does not name prescription medicines. Evidence: established as Health Canada’s position.

The same page lists short-term physical effects of the mushrooms on their own, including increased heart rate and blood pressure, nausea and vomiting, muscle twitching or convulsions, and sweating and high body temperature (Health Canada, magic mushrooms). Those are the baseline. Other substances add their own effects on top, which is part of why outcomes get harder to predict. For the effects of mushrooms alone, see magic mushroom effects, short and long term and are magic mushrooms safe?.

How often does mixing show up when things go wrong?

Often. Three different kinds of data, from three different places, each find other substances involved in a large share of mushroom-related problems.

A survey study. Researchers used the 2017 Global Drug Survey, a large anonymous online survey. Of 9,233 people who had used magic mushrooms in the past year, 19 (0.2%) said they had sought emergency medical treatment. Among those 19, 37% had also used cannabis and 32% alcohol, while 42% had used nothing else. When asked why the incident happened, 47% named their mindset, 37% the setting and 37% mixing with other substances (Kopra et al., 2022). The numbers are small and self-reported, and the authors note they do not know how common co-use was among everyone else in the sample. Evidence: preliminary.

An emergency department. A chart review at one US academic hospital found 232 emergency visits linked to recreational psychedelics between 2010 and 2023, about a quarter of them involving psilocybin. Alcohol was involved in 37.9% of cases and cannabis in 18.5%. The authors write that co-ingested substances may have made symptoms worse and contributed to the need for emergency care (Bhatt et al., 2026). One hospital, records written for care rather than research. Evidence: preliminary.

Poison centres. US poison centres recorded 6,933 encounters involving psilocybin from 2013 to 2022. Of these, 31.8% involved at least one other drug. Encounters with other substances grew faster in percentage terms than psilocybin-only encounters over that time (Montoy et al., 2025). A separate analysis of mushroom edibles reported to US poison centres in 2023 and 2024 found that exposures involving more than one substance were associated with higher odds of hospital admission and of moderate or worse toxicity (Jorgenson et al., 2026). Poison-centre data only capture the calls that are made. Evidence: preliminary.

None of these studies can prove that mixing caused a given emergency. People who mix may also differ in other ways. But the pattern is consistent across a survey, a hospital and poison-centre records, and it matches Health Canada’s warning.

Shrooms and alcohol: what is known?

Alcohol is one of the substances most often found alongside mushrooms when people need help. It was reported by 32% of the survey respondents who sought emergency treatment (Kopra et al., 2022) and was involved in 37.9% of psychedelic-related emergency visits in the hospital chart review (Bhatt et al., 2026). Health Canada names alcohol in its warning (Health Canada, magic mushrooms).

Direct research on how the two interact is very limited. A 2024 systematic review of drug interactions with classic psychedelics found only one older study on alcohol. In it, 15 people reported drinking alcohol before or after psilocybin, with the amounts unknown. The review summarizes it as finding that psilocybin blunted the felt effects of alcohol, while psilocybin’s own effects were reduced in only 2 of the 15 and stronger in 1 (Halman et al., 2024). That is a tiny self-report study, and it says nothing about safety.

What we do not know matters more than what we know. We found no controlled study of alcohol with psilocybin mushrooms, no measured rate of harm, and no evidence that any amount is safe to combine. In the hospital review, alcohol was not one of the factors linked to psychiatric admission, but the authors note that confidence intervals were wide (Bhatt et al., 2026). Evidence: preliminary, and mostly about how often alcohol shows up, not what it does.

Shrooms and weed: does cannabis make a trip more intense?

This is the combination with the most research, and the findings lean towards “more intense, and sometimes harder”.

A prospective online survey followed 321 people before and after a planned psychedelic experience. Using cannabis at the same time as the psychedelic was associated with a more intense experience on several measures, and the more cannabis people reported, the higher those scores. Scores for challenging experiences did not rise in a straight line: they were higher in the group reporting the most cannabis, but the pattern differed between measures, and for grief the highest scores were in people who used no cannabis. The authors say design limits stop them drawing firm conclusions about cause (Kuc et al., 2022). Evidence: preliminary.

Emergency data point the same way. In the hospital chart review, using cannabis at the same time was linked to about 11 times higher odds of being admitted to a psychiatric unit, alongside a history of bipolar or psychotic disorders. The confidence interval was very wide, and the authors say it is unclear whether this depends on amount, timing or a person’s vulnerability (Bhatt et al., 2026). The emergency-survey authors also cite earlier research in which some people who used cannabis to calm a difficult mushroom experience said it made the experience significantly worse, and they note that cannabis itself can cause acute psychotic-like symptoms (Kopra et al., 2022; the earlier study is reported second-hand through this paper). Evidence: preliminary.

Not every study is negative. A 2026 retrospective survey of 365 people who use psilocybin found that those who also used cannabis reported greater perceived improvements in quality of life, anxiety, depression and alcohol use (Hooper et al., 2026). That is self-rated, looking back, and cannot show cause. It does not cancel out the emergency data. Evidence on the balance of benefit and harm: unresolved.

If you have a personal or family history of psychosis or bipolar disorder, those conditions appeared as risk factors in the hospital review. Our article on whether magic mushrooms can cause psychosis covers that evidence.

MDMA, other psychedelics and “jedi flipping”

Slang has grown up around combining psychedelics. Researchers use “hippy flipping” for MDMA with psilocybin and “candy flipping” for MDMA with LSD (Zeifman et al., 2023). Online, “jedi flipping” is used as slang for LSD, psilocybin mushrooms and MDMA together; we found no study that uses or examines the term. We explain the words only so readers know what they mean. We found no peer-reviewed study of the three-way combination.

Combining these drugs is not rare among people who use them. A Danish interview study of 98 active MDMA and hallucinogen users found that using several substances at once was common, especially with alcohol and cannabis, and that 56% of the MDMA users had combined MDMA with hallucinogens (Licht et al., 2012). MDMA was one of the substances reported before emergency treatment in the Global Drug Survey analysis (Kopra et al., 2022), and in the hospital chart review MDMA accounted for 30.2% of psychedelic-related visits (Bhatt et al., 2026).

One prospective survey (27 people who combined MDMA with psilocybin or LSD) found less intense challenging experiences in one self-reported MDMA dose group but not in the other. The authors list a convenience sample, a small sample and a non-experimental design as limits, and say controlled studies of the effects and safety of combining the drugs are needed (Zeifman et al., 2023). That is a hypothesis for research, not a reason to combine. Street MDMA is not checked for what it contains, and none of these studies tested that. Evidence: preliminary.

For LSD with MDMA, the 2024 review describes one placebo-controlled study in which the combination made drug effects last longer than LSD alone (Halman et al., 2024). How LSD, DMT and psilocybin differ is covered in psilocybin, LSD and DMT: the differences.

Amphetamines, cocaine and other stimulants

Health Canada names amphetamines in its warning (Health Canada, magic mushrooms). Mushrooms alone can raise heart rate and blood pressure, and the evidence on stimulants with mushrooms is very thin. Cocaine and methamphetamine were among the substances recorded in the emergency data (Kopra et al., 2022; Bhatt et al., 2026).

One published case shows how a combination can go wrong. A man prescribed the MAOI antidepressant tranylcypromine and an amphetamine-containing medicine took psilocybin mushrooms and developed severe high blood pressure with chest pain. The authors suspect, but did not test, an interaction involving another compound in the mushrooms, and advise warning people on MAOIs, particularly with medicines such as amphetamines (Barnett et al., 2025). It is one case. Evidence: unresolved.

Shrooms and lithium, antidepressants and other medicines

Lithium, a mood stabilizer, has the clearest warning signal. A 2021 study read online accounts of classic psychedelics taken with mood stabilizers from Erowid, Shroomery and Reddit. Of 62 reports of lithium with a psychedelic, 47% involved seizures and another 18% resulted in bad trips, and 39% involved medical attention. None of 34 reports with lamotrigine, another mood stabilizer, did. The authors provisionally concluded that psychedelic use may pose a significant seizure risk for people on lithium (Nayak et al., 2021).

Most of those reports were not about mushrooms. A later systematic review says 2 of 6 reports of lithium with psilocybin involved seizures, and describes the evidence as low quality (Sarparast et al., 2022); we could read that split only second-hand, through the review. The 2024 review also mentions reported instances of lithium causing seizures with LSD or psilocybin (Halman et al., 2024). Evidence: preliminary. These are self-selected online reports, so they are a warning signal, not a measured rate.

Antidepressants raise separate questions: weaker effects with SSRIs in some studies, a hypertensive emergency case with an MAOI, and serotonin syndrome. We cover those in detail in magic mushrooms and antidepressants rather than repeat them here. Do not stop or change any prescribed medicine on your own; talk to your prescriber or pharmacist.

How strong is the evidence for each combination?

Why does mixing make effects less predictable?

Several things stack up. Mushrooms on their own affect heart rate, blood pressure, temperature and perception (Health Canada, magic mushrooms). Each added substance brings its own effects. The studies above show that some combinations change how intense or difficult an experience feels (Kuc et al., 2022), and that one study found psilocybin blunted how alcohol felt (Halman et al., 2024). Unregulated products may not contain what their labels say, and the edible study notes their often unlisted ingredients and inconsistent formulations (Jorgenson et al., 2026).

Most of the research is surveys, chart reviews and case reports. Those can show a pattern, but they cannot tell any one person what will happen to them. That is the honest bottom line: the data do not support calling any combination safe.

Emergency signs and who to call

Canadian poison centres say to call 911 if the person is unconscious, not breathing or having a seizure (CAPCCT). Seizures matter here, because they are the main harm reported in lithium accounts (Nayak et al., 2021). For advice on a possible poisoning, the Ontario Poison Centre is available by phone 24 hours a day, every day of the year, at 1-800-268-9017 (Ontario Poison Centre). Elsewhere in Canada, most provinces are served through 1-844-POISON-X (1-844-764-7669) (CAPCCT).

Be honest with emergency staff and poison-centre staff about everything that was taken, including alcohol, cannabis and prescription medicines. They cannot account for what they do not know about.

If you or someone you know is thinking about suicide, call or text 9-8-8, 24 hours a day, every day of the year. It is not an emergency dispatch service: the 9-8-8 site says to call 9-1-1 right away if your safety is at risk (9-8-8).

What we still don’t know

• Whether any combination with psilocybin mushrooms is safe for anyone. No controlled study tests this (unresolved).
• How alcohol and psilocybin interact in the body, beyond one tiny self-report study (unresolved).
• Whether cannabis causes harder experiences or psychiatric admissions, or whether people who mix differ in other ways (preliminary).
• How common seizures are with lithium and psilocybin. The figures come from self-selected online reports and are not rates (preliminary).
• Anything about the three-way “jedi flip” from research (unresolved).
• Whether any of this applies to a particular person. These studies describe groups, and bodies, medicines and health conditions differ (unresolved).

This article is general information, not medical advice. For questions about your own medicines or health, ask a pharmacist, doctor or nurse.

Shroomverse sells mushroom products. This article is general harm-reduction information about official guidance and published research. It is not medical, legal or purchasing advice, and it does not recommend any product or combination.