Can I Combine Kava Root?

Dear Kava Guru,

What can and can’t I combine Kava with?

Dan, Reno, NV

This is a question I get asked so often, and it’s a wonder at how much literature there is on the topic. Well, if you think about it, ‘Kava combinations’ is quite a broad topic, since the combinations of interest can range from herbal to pharmaceutical and everything in between! So, there’s a lot of information here – and I’ve done my best to break it down and pick out the most important Kava combinations from the masses of research that there are on various combinations with Kava and their interactions. If you don’t see your combinations of interest here – go ahead and summon my guru wisdom. How can you summon my wisdom? By simply asking!

Herbal Combinations:

Naturally, many people instinctively combine other medicinal herbs with kava kava, thinking something along the lines of “Hey it’s all natural – why not throw it all together and reap multiple benefits!” But, it’s important to realize that- as with Kava – many medicinal herbs (such as the duke nukem strain of cannabis) have biochemical interactions with the body that could alter the functioning of enzymes, hormones, or other biochemical components of the body. For comfort reasons, people often try to partake of this one via a fat buddha glass bong, or a similar product, as this can help those biochemicals enter the body. For example, Kava inhibits the CYP 450 enzymatic pathway, and as a result any herbal treatment that is metabolized by these enzymes cannot be properly metabolized and there may be resultant health risks [5]. It’s possible then that certain chemical reactions or states might not mix well with each other. As a result – it’s always wise to err on the side of caution and do a bit of research before combining Kava with other herbs or plants. So, to help you out I’ve put together some of my own research with regard to combining Kava and other popular herbal remedies.

Sedatives: (lavender, passionflower, valerian, chamomile, hops)

The general consensus within the field of herbal interactions is that you will experience a heightened sedative effect when combining any other herbal sedative with Kava; this is an effect that may or may not be desirable [1, 3, 6]. Since Kava is in some way also a sedative and acts on the same enzymatic pathways – the two naturally coincide. In terms of safety there isn’t really any information with regard to Kava and herbal mixture health concerns or precautions. But, nonetheless you should always research your combination of interest or ask a health practitioner.

Passiflora (Passionflower): One study directly monitored the effect of passionflower and Kava alone and in combination. The results indicated that there was a doubling effect, meaning that the combination of the two increased the effect of each individually by 50%. The study demonstrated that in terms of sedative effects, there was a 91.6% prolongation of sleep duration when the combination of kava kava and passionflower was administered [3].

Valerian: There was an extensive study conducted on the effects of Kava and Valerian independently and combined with each other. The results indicated heightened levels of stress reduction and anxiety alleviation in three categories: social, personal and life events. Also, there was a significant improvement with subjects experiencing insomnia – ie. insomnia was decreased. One of the most common effects indicated by the subjects who took the combination of Kava and Valerian was vivid dreaming [8].

Stimulants: (coffee, kola nut, máte, guaraná)

Unfortunately, there isn’t too much information available with regard to the safety of combining Kava with herbal stimulants or their interactions. But, generally speaking, it’s unwise to combine kava kava with any herbal stimulant, and probably any synthetic stimulant as well. Quite generally – it’s unwise and counterproductive to combine stimulants and sedatives, because of their counteractions on the same or relatively similar biochemical compounds [6]. If you’re looking for something to calm you down, you take a sedative — you don’t want to then take a stimulant and undo what you’re trying to accomplish.

For example, coffee and Kava probably interfere with each other and their relative performance. It’s quite possible that Kava aggravates dopamine or dopamine receptors, meaning that it interferes with its release [2]. If this is the case, then something like coffee – a natural substance that stimulates the release of dopamine [7] – will naturally compete with Kava because each is trying to do a different thing to your biochemical system.

Combination with Alcohol:

Ahhh, now to discuss the single most commonly searched Kava combination – alcohol and Kava. I won’t go into too much detail here, as I’ve unloaded much of my wisdom on another post with regard to combining alcohol and Kava; I’ve posted the link below.

But, I will say very generally that although people often combine Kava and alcohol and have remained alive to tell the story – it isn’t necessarily very safe or wise to do so. There are several studies on the combination of Kava and alcohol and the general consensus of all of these studies is that you should never combine Kava and alcohol, as the combination of the two greatly increases your chance of hepatotoxicity (toxicity of the liver).

Besides, why not just drink Kava instead of alcohol altogether? Many people actually prefer to drink Kava over alcohol – given that it has very similar effects, and is generally considered to be a nonaddicting and healthy alternative to drinking alcohol.

More Information on Combining Alcohol and Kava

Pharmaceutical Drug Interactions:

In the case of Kava combinations with pharmaceutical drugs – it is imperative that you seek medical advice from a practitioner or at least do some research on the interaction of the two substances. Yadhu N. Singh suggests that pharmaceutical interactions could be the most significant of the Kava combinations. Kavalactones – the beneficial compounds in Kava – inhibit cytochrome P 450 (CYP 450) [5]. CYP 450 is an enzyme that acts as a catalyst in the process of oxidizing organic substances. However, most importantly, it is a major enzyme category used by the body for the metabolization of drugs [8]. Given that these enzymes are inhibited by Kava, Kava may then prevent the body from properly metabolizing pharmaceutical drugs [5]. As a result it is extremely important that you do your research before combining Kava with any pharmaceutical drug. I’ve put together some information on the most common Kava and pharmaceutical interactions – hopefully you’ll find your answers!

Central Nervous System Agents (Benzodiazepines): Given that Kava and Benzodiazepines act on the same CNS receptors, it is likely that the combination adds to the effects caused individually by each and/or has at least a synergistic pairing with each other (ie. increases the effects of each substance). Also, Kava will add to the drowsiness that is stereotypically experienced by those who use benzodiazepines [2]. With this being said, there are many alternatives to benzodiazepines that you can look into, if you are noticing that you are experiencing many side effects from taking this medication. It is important to speak to a professional first, before making any decisions regarding your health. This is due to the benzodiazepines’ addictive ability. There are many who find themselves addicted to the medication, with some needing professional help to break the addiction. Rehab centers often use drug tests in order to determine whether or not patients are using the drug while staying with them. To learn more about benzodiazepine drug tests – see

Anesthetic Agents: Kava is actually considered to be an anesthetic itself and has been reported to have muscle relaxant effects as well as inducing numbness. Since anesthetics are intended to essentially do exactly the same thing – relax and numb muscles/tissues – there will inevitably be synergistic effects and Kava will prolong and intensify the effects of the anesthetic [2]. It’s actually recommended to not ingest Kava before going in for surgery for precisely the reason mentioned above – that there will be an interference with the functioning of the pharmaceutical anesthetics that you will be given [1].

Analgesics or Painkillers (Acetaminophen, ibuprofen, aspirin, Percocet): There is an increased chance of liver damage or hepatotoxicity and kidney damage when Kava and pharmaceutical painkillers are taken simultaneously. As a result it is simply wise to avoid this combination [2].

Diuretics (acetazolamide, amiloride, furosemide and ACE inhibitors such as benazepril, captopril, lisinopril, quinapril and ramipril): Kava is a diuretic itself and also does cause dehydration, so if Kava is combined with pharmaceutical or herbal diuretics it will likely add to the effects and increase dehydration [10, 1].

Psychoactive Drugs (Xanax): While there is one reported case of coma induction, which is possibly linked to the combination of Kava with Xanax [4], it is nonetheless unclear what the exact biochemical interaction is like.

Dopamine agonists/antagonists (Xanax, prozac, droperidol, haloperidol, risperidol, metoclopramide, and other antidepressants or anti-anxiety medications): As was mentioned above in relation to coffee – Kava is reported to be an antagonist of dopamine; meaning, Kava inhibits dopamine receptors and transmitters. As a result Kava can either act as an additive to the effects of pharmaceutical dopamine antagonists or an inhibitor in the case of the combination with dopamine agonists [1].

As you can see there are a TON of possible interactions that Kava may have with herbal and plant-based remedies or pharmaceutical medications. If your health is as important to you as it is to us – then hopefully you have read this article and are doing further research on the particular Kava combination you have in mind. If you don’t see information on the Kava combination you seek to gain knowledge about, please do ask me! My guru wisdom is pretty much endless when it comes to many topics and I would love to share as much as possible with my readers – but of course sometimes it’s not possible to cover everything. That’s where you come in! I love to get some direction from my readers telling me what it is exactly they want to know about. In the meantime, I hope that this has helped!

A few quick tips to remember:

– It is unwise to combine Kava with alcohol – rather, use Kava as a healthy alternative!

– Always consult a physician when wanting to combine Kava with a pharmaceutical drug.

– Kava acts on CYP 450 enzymes, as do many herbal and pharmaceutical remedies – so, be careful when combining them! These enzymes metabolize some herbs and medicines, so Kava could interfere with the metabolization process or have other undesirable biochemical interactions.


Kava Guru


1. Basch, Bent, Boon, Ernst, Hammerness, Sollars, Tsourounis, Ulbricht, Jen Woods. “Safety review of kava (Piper methysticum) by the Natural Standard Research Collaboration”. Natural Standard Research Collaboration, 2005. Vol. 4 (4), p. 779-794.

2. Bressler, Rubin. “Herb-drug interactions: interactions between Kava and prescription medications”. Advanstar Communications, INC, September 2005. Vol. 60 (9), p. 24.

3. Capasso, A and Sorrentio, L. “Pharmacological studies on the sedative and hypnotic effect of Kava kava and Passiflora extracts combination”. Phytomedicine, 2005. Vol 12, p. 39-45.

4. Graedon, Joe and Graedon Teresa. “Herb Interaction Could Lead to Coma”. Tribune Publishing Company LLC, February 21, 1999.

5. Singh, N. Yadhu. “Potential for interaction of kava and St. John’s wort with drugs”. Journal of Ethnopharmacology, May 18, 2005. Vol. 100, p. 108-113.

6. Stuart, Armando Ph. D. “Kava Kava”. 2005. Online:

7. Wenk, Gary Ph. D. “Why Does Coffee Make us Feel so Good?” Psychology Today – Your Brain on Food, October 28, 2011. Online:

8. Wheatley, David. “Stress-induced insomnia treated with kava and valerian: singly and in combination”. Human Psychopharmacology, 2001. Vol. 16, p. 353-356.

9. Wikipedia. “Cytochrome p450”. Last updated, April 28, 2014.

10. Wong, Cathy ND. “Kava Kava”. – Alternative Medicine. Last Updated, April 08, 2014. Online:

  1. Ruth Roberts

    I am a 78 year old woman. Having some problems with anxiety and insomnia. Don’t want to take lorazepan. Bought some kava kava. It is 250mgs…30%kavalactones .Each capsule also contains 100 mgs of eleuthero. I cannot talk to my doctor about….he knows nothing about herbs and such. Question….is it more effective to take Kava Kava alone or is the combination just as effective. I really need help. Thank you for a quick response.

    • Kava Guru


      I’ve found that Kava can work quite well when blended with other herbs. Eleuthero has been called “Siberian Ginseng” and reportedly may help the body deal with physically and mentally stressful exposures, such as heat, cold, physical exhaustion, extreme working conditions, and noise. It does seem like it could be a good accompaniment to Kava, but it seems there may be better herbs to blend with your Kava if you’re looking to help with your insomnia.

      I would suggest taking your Kava with some Chamomile or Valerian Root tea. I’ve found this really effective for increasing the effects of the Kava. If you want to find a pre-blended product, has a product called ‘Awa Calm, which is a blend of herbs developed to reduce anxiety and calm both the mind and body.

      Let me know what you discover for yourself, and if you’ve found something effective, I’d love to hear about it.


  2. Ashley

    Hi, I have some kava and was doing some research on it’s effects and things. According to what I have found is that kava alone over a period of time causes liver failure or other liver problems. But I am needing to find something to help my husband. So I was wondering if a small amount mixed with passion flower might be ok as long as it’s not by itself in a large dosage? I take passion flower for anxiety, and it helps me, but my husband needs something stronger. Good idea or no?

    • Kava Guru


      There are a mountain of non-media-hype articles that provide the proof that Kava is not dangerous to the liver. In fact, the World Health Organization, in a book, called “Assessment of the Risk of Hepatotoxicity with Kava Products” outlined how safe Kava actually is. When taken out of context, almost anything can seem like a terrible danger. For example, over 7,000 deaths per year are associated with non-steroidal anti-inflammatory medications such as aspirin. Conversely, Kava, with over 3,000 years of safe use, has only possibly (key word is possibly) been linked to liver issues in less than twenty people, in total, ever. Compared to 7,000 deaths per year from aspirin, it starts to make a little more sense. You actually have a better chance of getting killed from a vending machine falling on you or getting struck by lightning than you have any chance of having any harm to your liver from Kava.

      Stepping off my soap box now, and onto Passion Flower.

      Passion Flower and Kava are a GREAT blend! In fact, the good folks over at have a product more and more people have been asking me about called “Kava Blends”. I’ve personally tried all 12 blends, and I have to say that the Kava Blends Passion Flower is one of my favorites. To quote the product description; “Kava already relaxes. But what if you want to kick your Kava up a notch, and make it the perfect and natural way to feel even more relaxed and at peace? This is where Passion Flower comes in.”

      If you decide to give it a try, I’d love to hear your comments below, to share with other curious readers.

      Hope this helps!

      Keith @ Kava.Guru

  3. Russ

    Girlfriend took St. Johns Wort, then later some herbal Yogi Tea witg Kava for extra relaxation before a workshop she was about to lead and feeling nervous about. She felt more relaxed for awhile, then later started feeling anxious. Do you think the kava-st.johns combo may have had something to do with this? Any insights on this combo? Thanks!

    • Kava Guru


      This is a good question. Although I’m not doctor who specializes in alternative medicines, my wife is. When I posed the question to her, she said that it’s highly unlikely that the anxiety was a result of that herbal blend. In fact, she said that St. John’s Wort can take up to 2 weeks to reach it’s effectiveness. So, a single dose of St. John’s Wort right before a yoga class probably wasn’t the culprit. What I would look to is the environment, or other factors such as her stress level in general, what food she ate that day, and so on. Or, it’s entirely possible that the Kava did it’s job by helping to reduce her anxiety, and then her anxiety levels just came right back up to where they were before she consumed the Kava. Kava’s effectiveness peaks after about an hour or so, and suuplementing doses or cups of tea can be needed to keep it at peak effectiveness.

      Hope this helps!

  4. Jamila

    Hi I was wondering, can Kava be taken with skullcap?

    • Kava Guru


      I often blend Kava with scullcap, and it can be quite pleasant. In fact, Happy Kava Brand makes a series of Kava Blends, one of which contains scullcap.

      You can find it over at Kava Blends: Kava Blend Builder

      Hope this helps!


Comments have been disabled.