Herb & supplement monograph

Condurango Drug Interactions, Uses, Effectiveness, Safety & More

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Reviewed by licensed pharmacists Sourced from Natural Medicines
Interaction report

Drugs that interact with Condurango

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

We don’t currently list any known drug interactions for Condurango. 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 Condurango combination — clinical detail, likelihood, evidence level, and citations.
  • Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.
Monograph

Condurango: Uses, Safety & Side Effects

The bottom line

Condurango is the bark of a South American vine traditionally used as a bitter to stimulate appetite and ease digestive complaints. Modern scientific evidence supporting any of these uses is very limited, and its safety has not been well studied, so use caution and talk with a pharmacist or doctor before trying it.

Scientific name
Marsdenia condurango
Family
Apocynaceae
Part used
Dried bark
Common forms
Tincture, fluid extract, tea (decoction), homeopathic preparations
People commonly use it for
  • Digestive upset
  • Loss of appetite
  • Stimulating gastric secretion
  • Indigestion and bloating
  • Traditional tonic

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

Safety at a glance
OverallUse caution

Little modern safety data exists, so use cautiously and at low amounts.

PregnancyInsufficient reliable information

Insufficient reliable information available; avoid using.

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

Condurango is an herbal remedy made from the dried bark of Marsdenia condurango, a climbing vine native to South America, especially the Andes regions of Ecuador, Colombia, and Peru. The name comes from a local word, and the bark has a long history in folk medicine.

Traditionally, condurango bark has been used as a bitter tonic. Like other bitter herbs, it was taken to stimulate appetite and support digestion. It is most often prepared as a tincture, fluid extract, or as a tea (decoction) made by simmering the bark. It also appears in some homeopathic products.

How it works

Condurango bark contains bitter compounds known as condurango glycosides, along with other plant chemicals. Like classic bitter herbs, the bitter taste is thought to reflexively stimulate saliva and stomach secretions, which may help with appetite and digestion.

This proposed mechanism is mostly based on how bitters are believed to work in general and on traditional understanding. Detailed laboratory and animal studies are limited, and the active compounds have not been thoroughly studied in people.

Effectiveness

Does Condurango work?

Evidence overview · 1 use evaluated
1 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 Condurango, current evidence isn’t strong enough to rate any specific use. The conditions it has been studied for are listed below.

Also studied for 1 condition — evidence insufficient to rate
Insufficient Reliable Evidence To Rate Cancer
Rating & evidence shown verbatim from Natural Medicines

Although there has been interest in using oral condurango for cancer, there is insufficient relable information about the clinical effects of condurango for this purpose.

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

Because condurango has not been well studied in modern times, its safety is not well understood. When used in small, traditional amounts as a bitter, it is generally considered to be reasonably tolerated, but large doses may be harmful and could cause nervous system effects.

People with stomach ulcers or other stomach conditions should be cautious, since bitters increase stomach acid. Anyone with a chronic illness, those taking regular medications, and older adults should check with a healthcare professional first.

Pregnancy and breastfeeding: There is no reliable safety information for these situations. To be safe, avoid condurango if you are pregnant or breastfeeding.

Side effects

In small amounts, condurango may cause mild digestive upset in some people. In larger amounts it could potentially cause more serious effects, including dizziness, disturbances of the nervous system, or even convulsions, based on older reports about its glycoside content.

If you notice any unusual symptoms after taking it, stop using it and seek medical advice. Allergic reactions are also possible with any plant product.

Dosing

There is no well-established or standardized dose of condurango. Traditional preparations included tinctures, fluid extracts, and bark teas, but the amounts vary widely between products.

If you choose to use a condurango product, follow the directions on the label and do not exceed them. Because reliable dosing information is lacking, it is best to start low and to check with a pharmacist or doctor before use.

Pregnancy & Breastfeeding

Condurango & Pregnancy

Insufficient reliable information

Insufficient reliable information available; avoid using.

Condurango & 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 1 sources that drive our Condurango monograph — publicly available pages from reputable medical and government organizations. Every link was verified to work before publishing.

  1. Herbs at a Glance — NIH NCCIH Source
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.

Product directory

Supplement products with Condurango

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

Candida Liver Care by Kroeger Herb Products Co. Capsule 100 Vegetarian Capsule(s) View ingredients & interactions Cell-Tox Ease by Earth Friend Herb Co. Liquid 1 Fluid Ounce(s) · 30 Milliliter(s) View ingredients & interactions Cell-Tox Ease by Earth Friend Herb Co. Liquid 4 Fluid Ounce(s) · 120 mL View ingredients & interactions Chem/Met by New Sun Capsule 90 Capsule(s) View ingredients & interactions Condura by NutraMedix Liquid 1 Fluid Ounce(s) · 30 mL View ingredients & interactions Condura by NutraMedix Liquid 1 Fluid Ounce(s) · 30 mL View ingredients & interactions Condurango by Herbal Terra Liquid 4 Fluid Ounce(s) · 120 mL View ingredients & interactions Condurango by Hawaii Pharm Liquid 4 Fluid Ounce(s) · 120 mL View ingredients & interactions Condurango 450 mg by TerraVita Premium Collection Capsule 100 Capsule(s) View ingredients & interactions Condurango Alcohol Free by Herbal Terra Liquid 4 Fluid Ounce(s) · 120 mL View ingredients & interactions Condurango Non-Alcohol by Hawaii Pharm Liquid 4 Fluid Ounce(s) · 120 Milliliter(s) View ingredients & interactions Condurango Powder by TerraVita Premium Collection Powder 4 Ounce(s) View ingredients & interactions Condurango Powder by TerraVita Premium Collection Powder 1 Ounce(s) View ingredients & interactions Core Black Radish Blend by Energetix Liquid 2 Fluid Ounce(s) · 59.1 Milliliter(s) View ingredients & interactions Core Black Radish Blend by Energetix Liquid 2 Fluid Ounce(s) · 59.1 mL View ingredients & interactions Core Condurango Blend by Energetix Liquid 2 Fluid Ounce(s) · 59.1 mL View ingredients & interactions Core Pau d'Arco Blend by Energetix Liquid 2 Fluid Ounce(s) · 59.1 mL View ingredients & interactions Core Pau d'Arco Blend by Energetix Liquid 2 Fluid Ounce(s) · 59.1 mL View ingredients & interactions Fibro-Ease by Earth Friend Herb Co. Liquid 4 Fluid Ounce(s) · 120 mL View ingredients & interactions Fibro-Ease LG by Earth Friend Herb Co. Liquid 1 Fluid Ounce · 30 Milliliter(s) View ingredients & interactions Funga-Stop Formula by Woodstock Herbal Products Liquid 1 Fluid Ounce(s) · 30 mL View ingredients & interactions Immunagen by Earth Friend Herb Co. Liquid 1 Fluid Ounce · 30 mL View ingredients & interactions Immunagen by Earth Friend Herb Co. Liquid 4 Fluid Ounce(s) · 120 mL View ingredients & interactions Memory-Ease by Earth Friend Herb Co. Liquid 1 Fluid Ounce · 30 mL View ingredients & interactions
Pharmacist Counseling Corner

Condurango: Common Questions

What is Condurango used for, and does it work?
People use Condurango 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 Condurango interact with prescription medications?
We do not currently list any known drug interactions for Condurango. This does not guarantee that none exist, so always confirm with your pharmacist before combining it with your medications.
How are Condurango 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 Condurango 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 Condurango 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 Condurango used for?
It has traditionally been used as a bitter tonic to stimulate appetite and ease digestive complaints such as indigestion and bloating. Strong scientific evidence for these uses is lacking.
Is Condurango safe to take?
Modern safety data is very limited. Small traditional amounts are generally thought to be reasonably tolerated, but larger doses may cause harm, so use it cautiously and ideally under professional guidance.
Can I take Condurango while pregnant or breastfeeding?
No reliable safety information is available, so it is best to avoid Condurango during pregnancy and breastfeeding.
Can Condurango treat cancer?
No. Despite some old folklore, there is no credible evidence that Condurango treats cancer, and it should never replace proven medical treatment.

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

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