Does Kava Get You High? What Research Says

Kava is a plant-based drink made from the root of Piper methysticum, a shrub native to the Pacific Islands. People have used it for centuries in ceremonial and social settings, and it has become popular in the US as a supplement for relaxation. The short answer to whether kava gets you high is no — not in the way alcohol or cannabis do. Kava does not produce the intoxication, hallucinations, or distorted thinking associated with those substances. What it does produce is a mild sedative and calming effect, and that distinction matters for anyone considering it.

Does Kava Get You High?

Kava does not get you high in the conventional sense. It is not a hallucinogen and does not cause the euphoria or perceptual changes that define a “high” from drugs like cannabis or LSD.

What kava does cause is a state that some users describe as relaxed, calm, and mildly sociable. In Pacific Island cultures, this effect has a name — it is often described as a feeling of peaceful contentment rather than intoxication. The active compounds in kava, called kavalactones, act on the central nervous system in ways that differ significantly from alcohol or illicit drugs.

The confusion likely comes from the fact that kava can produce noticeable physical and mental effects. Your muscles may feel loose. Your thoughts may slow slightly. You may feel more talkative or at ease. But these effects are generally mild at typical doses, and they do not include the impaired judgment, euphoria, or altered perception that people associate with being high.

It is also worth noting that “high” is not a medical term. It is a colloquial way of describing drug-induced intoxication. By that definition, kava does not qualify.

What Do Kavalactones Actually Do in the Brain?

Kavalactones are the primary active compounds in kava root. Researchers have identified at least 15 different kavalactones, though a handful appear to account for most of the effects.

The mechanism is not fully understood. What research suggests is that kavalactones interact with several neurotransmitter systems, including GABA receptors, which are involved in calming neural activity. Some studies indicate they may also affect sodium and calcium channels in nerve cells. Unlike benzodiazepines or alcohol, kava does not appear to bind directly to the same GABA receptor sites in the same way, which may explain why its effects feel different.

This is where biological plausibility gets ahead of clinical certainty. The exact receptor-level activity of kavalactones is still an active area of research. What is clear is that the effects are not identical to any major class of intoxicating drug.

The onset of effects typically occurs within 20 to 30 minutes of drinking traditional kava preparations. Effects generally last one to three hours, depending on the dose and preparation method. These timelines are based on traditional use patterns and general pharmacological observations, not on large controlled trials.

How Is Kava Different From Alcohol or Cannabis?

The comparison to alcohol comes up often because both are social substances consumed in group settings. But the pharmacology is quite different.

Alcohol is a central nervous system depressant that impairs motor coordination, judgment, and memory. It acts on GABA receptors and other systems in ways that produce clear intoxication. Kava produces relaxation without the same level of cognitive impairment, though high doses can cause drowsiness and slowed reactions.

Cannabis contains THC, which binds to cannabinoid receptors in the brain and produces euphoria, altered perception, and in some cases anxiety or paranoia. Kava does not act on cannabinoid receptors.

Some people report that kava feels vaguely similar to a low dose of a benzodiazepine — a prescription anti-anxiety medication. But even that comparison has limits. Kava is generally less potent and shorter-acting than most benzodiazepines at typical doses.

Here is a comparison of key differences:

• Alcohol: Causes intoxication, impairs coordination and judgment, acts primarily on GABA receptors.
• Cannabis: Causes euphoria and perceptual changes, acts on cannabinoid receptors.
• Kava: Causes relaxation and mild sedation, acts on multiple systems including GABA but not identically to alcohol or benzos.

One non-obvious point: kava is often described as a “reverse tolerance” substance, meaning some users report that effects become stronger with repeated use rather than requiring higher doses. This is frequently mentioned in kava communities, but the evidence for it is mostly anecdotal. No large clinical trials have confirmed this phenomenon.

What Are the Real Risks and Side Effects of Kava?

Kava is not without risks. The most significant concern involves liver toxicity.

Reports of liver damage associated with kava supplements led several countries, including Germany and Canada, to restrict or ban kava products at various points. The evidence is mixed. Some cases of liver injury have been documented, but many involved extracts, blends with other ingredients, or long-term high-dose use. Traditional water-based preparations used in the Pacific Islands have a much longer safety record, though that does not mean they are risk-free.

What is clear is that kava should not be combined with alcohol or other substances that stress the liver. People with existing liver conditions should avoid it. Anyone taking medications that affect the liver should talk to a doctor before using kava.

Other potential side effects include:

• Drowsiness and sedation
• Dizziness
• Stomach upset
• Skin reactions with heavy long-term use, sometimes described as kava dermopathy — a scaly, dry rash

The drowsiness is important. Kava can impair your ability to drive or operate machinery. Do not use it before driving. Do not combine it with alcohol or sedatives.

The evidence on kava’s safety profile is limited and in some cases conflicting. Some studies suggest traditional preparations are safer than extracts. Other research does not clearly support that distinction. No large, long-term human trials have established a definitive safety profile.

Does Kava Have Legitimate Medical Uses?

Kava has been studied for anxiety, and some research suggests it may have mild anti-anxiety effects. A few smaller trials have found that kava extracts reduced anxiety symptoms compared to placebo. However, the evidence is not strong enough to present kava as an established treatment for anxiety disorders.

The American Academy of Family Physicians and other medical organizations do not currently recommend kava as a first-line treatment for anxiety. Some clinicians may mention it as an option for mild situational anxiety, but this is not the same as saying it is proven effective.

For sleep, kava is sometimes used as a relaxant, but again, the evidence is limited. It is not a standard sleep aid in clinical practice.

No clinical guidelines currently recommend kava for any specific medical condition. If you are considering kava for anxiety or sleep, talk to a healthcare provider. Do not stop or replace prescribed medication without medical guidance.

Is Kava Legal in the United States?

Kava is legal in the United States. It is sold as a dietary supplement, which means it is not regulated the same way medications are. The FDA has not approved kava for any medical use.

This regulatory gap matters. Supplement products may vary in quality, potency, and purity. Some may contain kavalactone extracts rather than traditional root powder. Others may be blended with other ingredients. If you choose to use kava, look for products from reputable sources and be aware that label claims are not independently verified.

Some states or municipalities have local restrictions, but kava is not a controlled substance under federal law.

Can You Fail a Drug Test From Kava?

Standard drug tests do not screen for kava. Kavalactones are not included in typical urine, blood, or hair panels for employment or legal purposes.

That said, some kava products may be adulterated or mislabeled. In rare cases, supplements have been found to contain undisclosed ingredients. If you are subject to drug testing, the safest approach is to use only products from companies that provide third-party testing certificates.

Kava itself should not trigger a positive result on a standard drug test.

What Should You Know Before Trying Kava?

Kava is not a high. It is a mild relaxant with a long history of traditional use and a mixed modern safety record.

If you are curious about kava, understand that the experience is subtle for most people. It is not a substitute for alcohol if you are looking for intoxication. It is not a proven treatment for anxiety or insomnia. And it carries real, if uncommon, risks — particularly for your liver.

Talk to your doctor if you take any medications, have liver problems, or are pregnant or breastfeeding. No clinical guidelines exist for kava use during pregnancy or breastfeeding, and it should be avoided in those populations.

The bottom line: kava does not get you high. It relaxes you. Whether that is worth the risk is a personal decision best made with accurate information and, ideally, medical guidance.