Herb & supplement monograph

Malabar Nut Drug Interactions, Uses, Effectiveness, Safety & More

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Interaction report

Drugs that interact with Malabar Nut

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

We don’t currently list any known drug interactions for Malabar Nut. This doesn’t guarantee none exist — always confirm with your pharmacist before combining supplements with your medications.

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 Malabar Nut combination — clinical detail, likelihood, evidence level, and citations.
  • Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.
Monograph

Malabar Nut: Uses, Safety & Side Effects

The bottom line

Malabar nut (vasaka) is a traditional Ayurvedic herb used mostly for coughs and other breathing problems. Lab and animal studies suggest its compounds may help loosen mucus and relax airways, but high-quality human studies are limited. Talk to your pharmacist or doctor before using it, and avoid it during pregnancy.

Malabar Nut
Scientific name
Justicia adhatoda
Family
Acanthaceae
Part used
Leaves and roots (sometimes flowers and bark)
Common forms
Tea, syrup, juice, dried leaf powder, capsules, tincture
People commonly use it for
  • Cough and congestion
  • Asthma
  • Bronchitis
  • Common cold
  • Sore throat

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

Safety at a glance
OverallUse caution

Generally used in traditional medicine, but human safety data are limited so use carefully.

PregnancyUnsafe

When used orally; contraindicated.

Read the full pregnancy detail
BreastfeedingInsufficient reliable information

Insufficient reliable information available; avoid using.

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

Malabar nut comes from the plant Justicia adhatoda, also widely known as vasaka or adulsa. It is a shrub native to India and other parts of Asia, and it grows in many tropical and subtropical regions.

The leaves and roots have been used for hundreds of years in Ayurvedic and other traditional systems of medicine. People most often use it for breathing problems, such as cough, congestion, and asthma. It is taken as a tea, syrup, juice, powder, or capsule.

How it works

The plant contains compounds called alkaloids, with vasicine and vasicinone among the best studied. In laboratory and animal research, these compounds appear to help thin and loosen mucus and may help relax the muscles around the airways, which could make breathing easier.

Other compounds in the plant have shown anti-inflammatory and possible antimicrobial activity in test-tube studies. It is important to know that these mechanisms are mostly based on lab and animal work, so it is not certain how well they apply to people taking the herb.

Effectiveness

Does Malabar Nut work?

Evidence overview · 2 uses evaluated
2 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 Malabar Nut, current evidence isn’t strong enough to rate any specific use. The conditions it has been studied for are listed below.

Also studied for 2 conditions — evidence insufficient to rate
Insufficient Reliable Evidence To Rate Dental plaque
Rating & evidence shown verbatim from Natural Medicines

Preliminary clinical research in adults with or without chronic gingivitis shows that using an Ayurvedic toothpaste (Sudantha, Link Natural Products) containing nine herbs, including Malabar nut leaf, twice daily for 12-24 weeks can reduce dental plaque compared with baseline or an unknown control toothpaste. Due to poor study methodology, and the use of nine different herbs in the toothpaste formulation, further study is needed to determine the effect of Malabar nut leaf dental health.

Insufficient Reliable Evidence To Rate Upper respiratory tract infection (URTI)
Rating & evidence shown verbatim from Natural Medicines

Preliminary clinical research in patients with acute URTIs shows that taking a specific combination product (Kan Jang, Swedish Herbal Institute) containing extracts from Echinacea purpurea root, Malabar nut leaf, and Siberian ginseng root 30 mL orally once daily for 3-4 days does not reduce the severity or frequency of cough compared to bromhexine hydrochloride or placebo. Other preliminary clinical research in patients with acute URTIs shows that taking this product 30 mL orally three times daily for 6 days does not improve the frequency or severity of symptoms compared to taking bromhexine hydrochloride or a combination of only Echinacea purpurea root and Siberian ginseng root.

Source & disclaimer. Effectiveness ratings and evidence summaries are provided by Natural Medicines (Therapeutic Research Center) and shown as licensed. Where Natural Medicines hasn’t rated a use, HelloPharmacist’s pharmacists may add their own reviewed rating and evidence (each such entry is labeled). This is educational information, not medical advice — talk with your pharmacist or doctor before starting, stopping, or changing a supplement.

Safety & precautions

When used in small amounts as found in traditional preparations, Malabar nut has a long history of use. Even so, human safety data are limited, so it is wise to be cautious—especially with concentrated extracts or high doses.

Pregnancy: Avoid Malabar nut during pregnancy. It has traditionally been associated with effects on the uterus, and safety has not been established.

Breastfeeding: There is not enough reliable information, so it is best to avoid it while breastfeeding.

People with liver problems, those scheduled for surgery, and anyone with a chronic health condition should check with a healthcare provider before using it. Always tell your pharmacist or doctor about any supplements you take.

Side effects

Malabar nut is usually well tolerated in the small amounts used traditionally. Possible side effects can include nausea, stomach upset, vomiting, or diarrhea, especially at higher doses.

Because reliable human safety studies are limited, the full range of side effects is not well known. Stop using it and seek medical care if you notice an allergic reaction, such as rash, swelling, or trouble breathing.

Dosing

There is no well-established standardized dose for Malabar nut. The right amount depends on the form (tea, syrup, juice, powder, or capsule) and how concentrated the product is.

The safest approach is to follow the directions on the product label and not exceed the recommended amount. Because products vary widely in strength and quality, ask your pharmacist or doctor for guidance before starting, especially if you have a health condition or take other medicines.

Pregnancy & Breastfeeding

Malabar Nut & Pregnancy

Unsafe

When used orally; contraindicated.

  1. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.

Malabar Nut & Breastfeeding

Insufficient reliable information

Insufficient reliable information available; avoid using.

DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.

© 2026 Therapeutic Research Center

Pregnancy & lactation ratings: Natural Medicines, Therapeutic Research Center

References & further reading

The 5 references that drive our Malabar Nut monograph and interaction data, from the evidence-graded Natural Medicines (TRC Healthcare) database. Citations with a link open the study on PubMed or the publisher’s site.

  1. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
  2. Jayashankar, S., Panagoda, G. J., Amaratunga, E. A., Perera, K., and Rajapakse, P. S. A randomised double-blind placebo-controlled study on the effects of a herbal toothpaste on gingival bleeding, oral hygiene and microbial variables. Ceylon Med.J 2011;5 PubMed
  3. Narimanian, M., Badalyan, M., Panosyan, V., Gabrielyan, E., Panossian, A., Wikman, G., and Wagner, H. Randomized trial of a fixed combination (KanJang) of herbal extracts containing Adhatoda vasica, Echinacea purpurea and Eleutherococcus senticosus in pa
  4. Barth A, Hovhannisyan A, Jamalyan K, Narimanyan M. Antitussive effect of a fixed combination of Justicia adhatoda, Echinacea purpurea and Eleutherococcus senticosus extracts in patients with acute upper respiratory tract infection: A comparative, randomiz
  5. Howshigan J, Perera K, Samita S, Rajapakse PS. The effects of an Ayurvedic medicinal toothpaste on clinical, microbiological and oral hygiene parameters in patients with chronic gingivitis: a double-blind, randomised, placebo-controlled, parallel allocati
Keep reading

This information is for education only and is not a substitute for professional medical advice. Always check with your pharmacist or doctor before starting, stopping, or combining supplements and medications.

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

Product directory

Supplement products with Malabar Nut

121 products in our database contain Malabar Nut. Open any to see its full ingredient list and every drug interaction we check.

Digestive Cool & Calm by Herbal Zap! Powder 3.53 Oz(s) · 100 Gram(s) Off market View ingredients & interactions Flucomune by R-U-Ved Capsule Off market View ingredients & interactions Hear Well by 1-800-WellMed Capsule 60 Capsule(s) Off market View ingredients & interactions Immune Health Now by Banyan Botanicals Liquid 3.5 Oz(s) · 99 Gram(s) Off market View ingredients & interactions Immune Support by Herbal Zap Powder 25 Individual Packet(s) · 3.53 Oz(s) · 100 Gram(s) Off market View ingredients & interactions Immune Support by Herbal Zap Powder 10 Individual Packet(s) · 1.41 Oz(s) · 40 Gram(s) Off market View ingredients & interactions ImmunoCare by Himalaya Capsule 120 Vegetarian Capsule(s) Off market View ingredients & interactions ImmunoCare by Himalaya Capsule 240 Vegetarian Capsule(s) Off market View ingredients & interactions ImmunoCare by Himalaya Capsule 120 Vegetarian Capsule(s) Off market View ingredients & interactions ImmunoCare by Himalaya Capsule 240 Vegetarian Capsule(s) Off market View ingredients & interactions Lung Formula by Banyan Botanicals Tablet Or Pill 90 Tablet(s) Off market View ingredients & interactions Lung Formula by Banyan Botanicals Tablet Or Pill 90 Tablet(s) Off market View ingredients & interactions Lung Formula by Banyan Botanicals Tablet Or Pill 90 Tablet(s) Off market View ingredients & interactions Lung Formula by Banyan Botanicals Tablet Or Pill 90 Tablet(s) Off market View ingredients & interactions MenstriCare by Himalaya Capsule 60 Vegetarian Capsule(s) Off market View ingredients & interactions Organic Chyavanprash by Banyan Botanicals Other (e.g. Tea Bag) 9.4 oz. · 266 Gram(s) Off market View ingredients & interactions RespiCare by Himalaya Capsule 120 Vegetarian Capsule(s) Off market View ingredients & interactions RespiCare by Himalaya Capsule 120 Vegetarian Capsule(s) Off market View ingredients & interactions RoxyLean by BPI Sports Capsule 66 Capsule(s) Off market View ingredients & interactions StressCare by Himalaya Capsule 240 Vegetarian Capsule(s) Off market View ingredients & interactions StressCare by Himalaya Capsule 240 Vegetarian Capsule(s) Off market View ingredients & interactions StressCare by Himalaya Capsule 120 Vegetarian Capsule(s) Off market View ingredients & interactions StressCare by Himalaya Capsule 120 Vegetarian Capsule(s) Off market View ingredients & interactions StressCare by Himalaya Capsule 240 Vegetarian Capsule(s) Off market View ingredients & interactions
Pharmacist Counseling Corner

Malabar Nut: Common Questions

What is Malabar Nut used for, and does it work?
People use Malabar Nut for a range of reasons, but according to the Natural Medicines database the current clinical evidence is insufficient to confirm it works for the specific conditions it has been studied for. See the graded list on this page, and talk to your pharmacist or doctor before relying on it for any condition.
Does Malabar Nut interact with prescription medications?
We do not currently list any known drug interactions for Malabar Nut. This does not guarantee that none exist, so always confirm with your pharmacist before combining it with your medications.
How are Malabar Nut interactions rated?
Each interaction is graded major, moderate, or minor based on how clinically significant it is and the strength of the evidence behind it. Major interactions are the most serious and are best avoided, or used only under close professional supervision.
Is it safe to take Malabar Nut with my medications?
It depends on the specific medication. Some combinations are fine, while others call for monitoring, timing changes, or should be avoided. Check your exact drug above and confirm with your pharmacist or doctor before starting, stopping, or changing anything.
Where does this Malabar Nut interaction information come from?
Our interaction data is built on the Natural Medicines database — an evidence-graded reference for vitamins, herbs, and supplements — and is reviewed by licensed HelloPharmacist pharmacists, who may add clinical context.
What is Malabar Nut used for?
It is most commonly used in traditional Ayurvedic medicine for breathing problems such as cough, congestion, bronchitis, asthma, and the common cold.
Does Malabar Nut actually work for cough and asthma?
Lab and animal studies suggest its compounds may loosen mucus and relax the airways, but high-quality human studies are limited, so its effectiveness is not proven. Do not use it in place of prescribed asthma treatment.
Is Malabar Nut safe to take during pregnancy?
No. It is best avoided during pregnancy because it has traditionally been linked to effects on the uterus and its safety has not been established.
What forms does Malabar Nut come in?
It is available as teas, syrups, fresh juice, dried leaf powder, capsules, and tinctures, and it is a common ingredient in some herbal cough syrups.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

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