Can You Mix Kanna and Alcohol?

The short version: nobody has studied it in people, both affect the brain, and we recommend not combining them.

Can you mix kanna and alcohol? It is a fair question, since kanna shows up in drinks, shots and tinctures that people may have around a bar or party. The honest answer is that no one knows how the two behave together in people, and that uncertainty is itself the reason to keep them apart. This post explains what we searched, what we found, and what is established about each.

Are there studies on kanna and alcohol?

No, not that we could find.

On October 28, 2026 we searched PubMed for (sceletium OR kanna OR mesembrine OR zembrin) together with (alcohol OR ethanol). The first pass returned 43 records and a second returned 47. We reviewed the titles of the first set: the matches were chemistry papers (synthesis of mesembrine, "alcohol" as a chemical term), unrelated mental-health surveys (the word "kanna" is also a surname), and plant-material studies. None gave kanna and alcohol to people, animals or cells together [2]. In the Harvey 2011 pharmacology paper, ethanol appeared only as an extraction solvent [6]. The four extra records in the second pass, which we checked by title, were orthopedic, liver and surgical-infection papers.

Absence of studies is not evidence of safety, and it is not evidence of harm. It means the question is open. WebMD's sceletium page states the same gap: "There is not enough research to know if sceletium interacts with foods or drinks, including alcohol" [1].

What is known about each on its own?

Alcohol has extensive public-health data; kanna has a small set of short trials.

On alcohol, the CDC reports about 178,000 US deaths a year from excessive use and lists overdose risk "especially when combined with other drugs" among short-term dangers [3]. The WHO says there is no risk-free form of alcohol consumption [4]. The NIAAA notes alcohol can make it harder to think clearly and move with coordination [5].

On kanna, a 2013 imaging study of 16 healthy people found a single 25 mg Zembrin dose reduced amygdala reactivity to fearful faces [7], and a 2020 pair of studies in 20 volunteers measured lower self-reported anxiety in one stress task but not the other [8]. A 3-month trial of 37 healthy adults found no apparent differences in vital signs or bloodwork versus placebo, though it did not measure efficacy [9]. All used a single branded extract in healthy people, and none included alcohol. Details are in kanna benefits and is kanna safe.

Why do we advise against combining them?

Because both affect the brain and the interaction is untested.

Three reasons, none of them dramatic. First, there is no data, so nobody can tell you a safe amount or a safe timing. Second, both substances are psychoactive, and when two such substances are combined without research, it is not possible to predict the result for a given person. Third, product amounts differ widely: products we tracked range from 15 mg to 500 mg of kanna per serving, and the trial doses were of one specific extract [8][9]. A person cannot reliably infer a "light" amount from the label.

Alcohol also impairs coordination and judgment on its own [5], which matters for anything involving driving or safety. We do not have data on whether kanna would add to that or not, and we will not guess.

A comparable example: for kava, a different plant often paired with kanna in drinks, the NIH's NCCIH says it should not be used together with sedative substances such as benzodiazepines or alcohol [11]. See kanna vs kava. We cite it only to show that plant products can carry specific alcohol warnings. A kanna label may not mention alcohol simply because the combination has not been studied.

Does spacing them apart make it safe?

We cannot say, because there is no data on timing either.

People sometimes ask whether having a kanna drink earlier in the day and alcohol at night, or the reverse, avoids the problem. No study has tested any interval, and our search turned up no work of any kind on kanna alkaloids and ethanol together. Without that, any number of hours we offered would be invented. Individual differences, including body size, food, medications and how much of a product is actually in the can, add more unknowns on top of that. The cautious reading is the simple one: choose one or the other for a given occasion. If you have already combined them and feel unwell, stop both and contact a health professional.

What about kanna drinks and cocktails?

We recommend keeping kanna drinks separate from alcohol, including as mixers.

Some kanna products are sold as non-alcoholic beverages meant to be chosen instead of an alcoholic drink. Choosing one drink or the other is a different matter from combining them in one night or one glass. If you are weighing a non-alcoholic option for an evening, see kanna as an alcohol alternative. For how the two compare, see kanna vs alcohol. Our drink ranking lists what each can contains so you can see exactly what you are drinking.

Note that a non-alcoholic label should state it; if a product's label does not mention alcohol at all, check with the maker before assuming.

What if I take medication?

Talk to a doctor or pharmacist before using kanna, and about alcohol if you take any prescription.

WebMD lists possible interactions between sceletium and MAOIs, SSRIs, SNRIs, tricyclic antidepressants, antipsychotics, triptans and St. John's wort, and tells pregnant people to inform their provider, since effects on pregnancy are unknown [1]. The CDC separately warns that alcohol during pregnancy is linked with miscarriage, stillbirth and fetal alcohol spectrum disorder [3]. If any of these apply, the combination is a question for a clinician, not a blog post.

Where can I get help?

If you are worried about your drinking, SAMHSA's National Helpline is free, confidential and open 24/7 at 1-800-662-4357 (TTY 1-800-487-4889), in English and Spanish [10].

It provides referrals to local treatment facilities, support groups and community organizations rather than counseling. If someone has taken too much of anything and seems unwell, seek medical care promptly.

This page is general information, not medical advice. These statements have not been evaluated by the FDA. Kanna products are not intended to diagnose or address any disease or health condition. Disclosure: kannadrinks.com is published by Psilly Goose.

References

1. WebMD. Sceletium: Uses, side effects, interactions. webmd.com
2. PubMed search run October 28, 2026: (sceletium OR kanna OR mesembrine OR zembrin) AND (alcohol OR ethanol); no study of kanna combined with alcohol found. PubMed search
3. Centers for Disease Control and Prevention. About Alcohol Use. cdc.gov
4. World Health Organization. Alcohol (fact sheet). who.int
5. National Institute on Alcohol Abuse and Alcoholism. Alcohol's Effects on the Body. niaaa.nih.gov
6. Harvey AL, et al. Pharmacological actions of the South African medicinal and functional food plant Sceletium tortuosum and its principal alkaloids. J Ethnopharmacol 2011;137(3):1124-9. PubMed
7. Terburg D, et al. Acute effects of Sceletium tortuosum (Zembrin), a dual 5-HT reuptake and PDE4 inhibitor, in the human amygdala and its connection to the hypothalamus. Neuropsychopharmacology 2013;38(13):2708-16. PubMed
8. Reay J, et al. Sceletium tortuosum (Zembrin) ameliorates experimentally induced anxiety in healthy volunteers. Hum Psychopharmacol 2020;35(6):1-7. PubMed
9. Nell H, et al. A randomized, double-blind, parallel-group, placebo-controlled trial of Extract Sceletium tortuosum (Zembrin) in healthy adults. J Altern Complement Med 2013;19(11):898-904. PubMed
10. Substance Abuse and Mental Health Services Administration. National Helpline. samhsa.gov
11. National Center for Complementary and Integrative Health. Kava. nccih.nih.gov

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