Herb & supplement monograph

Noni Drug Interactions, Uses, Effectiveness, Safety & More

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS ·Updated July 2026

What is this page for?

First and foremost: how Noni interacts with medications. The heart of this page is the interaction list — every drug Noni is known to interact with, and how serious each one is.

But these pages have grown well beyond that into a full monograph — what Noni is, what people use it for and how strong the evidence is, its safety and side effects, and answers to the questions we’re asked most — written and reviewed by the clinical staff at HelloPharmacist. It’s educational information from our licensed clinical databases, not medical advice, and we don’t sell or endorse products. Our editorial policy

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Noni Drug Interactions: The Bottom Line

From the HelloPharmacist Editorial Team · Updated July 2026

Based on the available evidence, the overall risk of a clinically significant Noni drug interaction appears low for most people. None of the listed interactions with noni are rated major, and nearly all rest on theoretical concerns or single case reports rather than well-controlled human studies.

Interactions deserving the most attention

The strongest signals involve medicines that need very steady levels in the body. In one reported case, noni juice appeared to reduce the effect of warfarin, lowering a patient's INR, which could raise the risk of clotting. Another case report linked noni juice to lower phenytoin levels, which could weaken seizure control. Because noni juice is naturally rich in potassium, it also deserves care alongside ACE inhibitors, ARBs, or potassium-sparing diuretics, since these drugs can already raise potassium levels.

What the rest of the list means

The long list of interacting medications may look worrying, but it does not mean each combination is harmful. Most entries stem from noni's potassium content, a possible mild blood-pressure-lowering effect, or a general caution around drugs that can stress the liver, and these effects are predicted rather than proven in people. For most medicines, no meaningful problem has actually been documented.

Check your medications against Noni

Based on HelloPharmacist’s Noni interaction data and reviewed under our editorial standards.

Interaction report

Drugs that interact with Noni

544 medications have a known interaction with Noni, graded by severity. Select any drug for the full evidence-based detail.

Don’t want to scroll the list? Just ask.

Tell us the medications you take and we’ll check each one against Noni using our pharmacist-reviewed interaction data.

AI summaries are generated from our Noni interaction data for education only — always confirm with your pharmacist. How we use AI

2,830 drugs

Read The List Like a Pharmacist

What Severity, Likelihood & Evidence Mean

Severity — How Serious It Can Be

Major. Clinically significant; generally best avoided, or used only under direct professional supervision.
Moderate. May need monitoring, a dose adjustment, or separating the times you take each one.
Minor. Generally not clinically significant, but still worth noting and mentioning to your pharmacist.
No known interaction. Checked against our sources with nothing documented — not the same as proven safety.

Likelihood — How Well It’s Documented

Likely. Well-controlled human studies have demonstrated the likely existence of this interaction
Probable. Interaction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
Possible. Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists
Unlikely. Interaction has been demonstrated in animal or in lab research but has been shown not to occur in humans.

Where This Data Comes From

Interaction records are evidence-graded and sourced from the Natural Medicines database (TRC Healthcare), the same reference used by pharmacists and hospitals.
Each drug listed above links to the full report for that exact Noni combination — clinical detail, likelihood, evidence level, and citations.
Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

The big picture

The kinds of drugs Noni affects

Every type of medication (drug category) Noni is known to interact with. Open any category for the detail — or search your exact drug in the checker above.

All 8 drug categories Noni interacts with

Ace Inhibitors (aceis)Angiotensin Receptor Blockers (arbs)Antihypertensive DrugsHepatotoxic DrugsPhenytoin (dilantin)Potassium-sparing DiureticsWarfarin (coumadin)Ranitidine (zantac)

Ace Inhibitors (Aceis)

Theoretically, combining noni and ACE inhibitors might increase the risk of hyperkalemia.
Noni juice contains significant amounts of potassium, about 6 mEq/100 mL juice. This may increase the risk for hyperkalemia when used in conjunction with ACE inhibitors, which can also increase potassium levels.

Likelihood Possible Evidence D

Angiotensin Receptor Blockers (Arbs)

Theoretically, combining noni and ARBs might increase the risk of hyperkalemia.
Noni juice contains significant amounts of potassium, about 6 mEq/100 mL juice. This may increase the risk for hyperkalemia when used in conjunction with ARBs, which can also increase potassium levels.

Likelihood Possible Evidence D

Antihypertensive Drugs

Theoretically, noni may increase the risk of hypotension when used in combination with antihypertensive drugs.
Preliminary clinical research suggests that drinking noni juice can reduce blood pressure in individuals with hypertension.

Likelihood Possible Evidence D

Hepatotoxic Drugs

Theoretically, taking noni with hepatotoxic drugs might increase the risk of liver damage.
There is concern that noni might cause hepatotoxicity in some patients. Advise patients against combining noni with potentially hepatotoxic drugs.

Likelihood Possible Evidence D

Phenytoin (Dilantin)

Theoretically, taking noni fruit juice concomitantly with phenytoin may lower phenytoin levels and increase the risk of seizures.
In one case report, an adult taking phenytoin for partial seizures experienced low serum phenytoin levels while taking noni juice 90-200 mL daily. Serum phenytoin levels increased after decreasing noni juice consumption; similarly, serum phenytoin levels decreased after increasing noni juice consumption. Some researchers believe noni juice may induce cytochrome P450 2C9 enzymes, which would decrease phenytoin levels, but this has not been well studied. Patients may need additional monitoring when starting or stopping noni juice supplementation.

Likelihood Possible Evidence D

Potassium-Sparing Diuretics

Theoretically, combing noni and a potassium-sparing diuretic might increase the risk of hyperkalemia.
Noni juice contains significant amounts of potassium, about 6 mEq/100 mL juice. This may increase the risk for hyperkalemia when used in conjunction with potassium-sparing diuretics, which can also increase potassium levels.

Likelihood Possible Evidence D

Warfarin (Coumadin)

Theoretically, taking noni juice concomitantly with warfarin might decrease the effectiveness of warfarin.
In one case, a 41-year-old patient stabilized on warfarin had a decreased international normalized ratio (INR) following consumption of a specific commercial noni juice product (Noni juice 4 Everything). While the patient was still taking noni juice, an increase in warfarin dose did not produce an increase in INR. However, it should be noted that this particular product contained extracts and derivatives from more than 115 components, many of which contained vitamin K. Furthermore, vitamin K was listed as a separate ingredient of the product, suggesting that the product was possibly fortified with vitamin K. It has not been verified that noni fruit alone contains a significant amount of vitamin K or interacts with warfarin.

Likelihood Possible Evidence D

Ranitidine (Zantac)

Taking noni fruit with ranitidine might increase the levels and clinical effects of ranitidine.
Clinical evidence shows that taking an aqueous extract of noni fruit 30 minutes prior to taking a single oral dose of ranitidine can increase the rate of absorption and plasma concentration of ranitidine.

Likelihood Possible Evidence B

Monograph

Noni: Uses, Safety & Side Effects

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS · Reviewed July 2026 ·

The bottom line

Noni is a tropical fruit used widely in folk medicine and sold mostly as a juice or supplement, but solid human evidence for its many claimed benefits is limited. While moderate juice intake is generally well tolerated, there are rare reports of liver problems, and it should be avoided in pregnancy and breastfeeding. Talk with your pharmacist or doctor before using it, especially if you have kidney or liver disease.

Scientific name: Morinda citrifolia
Family: Rubiaceae
Part used: Fruit (most common), but also leaves, roots, bark, stem, and flowers
Common forms: Juice, capsules, tablets, powders, teas, and topical products

People commonly use it for

General wellness and energy
Inflammation and joint pain
Immune support
High blood pressure
Skin and wound care
Digestive complaints

Popular and traditional uses — not proof it works. See “Uses & effectiveness” below for the evidence.

Safety at a glance

OverallUse caution

Generally tolerated in moderate amounts, but rare liver injury and high potassium content are concerns.

PregnancyInsufficient reliable information

While animal research is conflicting on the teratogenic effects of noni, there is insufficient reliable information available about the safety of noni...

Read the full pregnancy detail

BreastfeedingInsufficient reliable information

While animal research is conflicting on the teratogenic effects of noni, there is insufficient reliable information available about the safety of noni...

Read the full breastfeeding detail

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center). Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

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Overview

Noni (Morinda citrifolia) is a small evergreen tree native to Southeast Asia, Australia, and the Pacific Islands, including Hawaii. It produces a knobby, greenish-yellow fruit that has a strong, unpleasant smell and bitter taste when ripe — which is why it is sometimes called "cheese fruit" or "vomit fruit."

The fruit is rarely eaten fresh. Instead, it is processed into juice, capsules, powders, and teas. Pacific Island and Asian cultures have used noni for hundreds of years in traditional medicine, using not just the fruit but also the leaves, roots, bark, and flowers.

Today, noni juice is one of the most popular products and is marketed for a wide range of health goals, from boosting energy to supporting the immune system.

How it works

Noni contains many natural compounds, including antioxidants (such as vitamin C and certain polyphenols), iridoids, scopoletin, and various plant chemicals. Researchers believe these substances may have antioxidant and anti-inflammatory effects.

In laboratory and animal studies, noni extracts have shown effects on inflammation, immune cells, and tumor cells. However, these findings come mostly from test-tube and animal research and may not happen the same way in the human body.

Because the exact active compounds and how they behave in people are not fully understood, the proposed mechanisms remain largely theoretical.

Effectiveness

Does Noni work?

Here’s what the research actually shows for each use — graded by Natural Medicines and reviewed by Dr. Brian Staiger, PharmD.

Evidence overview · 31 uses evaluated

31 Insufficient evidence

How to read these evidence grades

Natural Medicines’ 7-point scale. We show each rating’s label word-for-word.

1EffectiveStrong, consistent evidence it works.

2Likely EffectiveGood evidence, though not yet conclusive.

3Possibly EffectiveSome evidence suggests a benefit.

4Possibly IneffectiveSome evidence it may not help.

5Likely IneffectiveFairly strong evidence it doesn’t help.

6IneffectiveStrong evidence it doesn’t work.

7Insufficient Reliable Evidence to RateToo little research to say either way.

For Noni, current evidence isn’t strong enough to rate any specific use. The conditions it has been studied for are listed below.

Also studied for 31 conditions — evidence insufficient to rate

Insufficient Reliable Evidence To Rate Aging