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Dietary supplement

Quina Alcohol Free Ingredients & Drug Interactions

by Herbal Terra

Quina Alcohol Free label
See full label image
Liquid Category: Botanical
Most serious interaction: Major
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Quina Alcohol Free against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.

Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy

The interaction bottom line Most serious interaction: Major

Quina Alcohol Free is a dietary supplement by Herbal Terra with 1 active ingredient. Its ingredients are commonly taken for malaria (historical/traditional), fever, leg cramps and restless legs.Based on those ingredients, 492 medications have a known interaction with it, the most serious rated major. The ingredients most likely to interact are Quina Bark Extract, Dry. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Quina Alcohol Free by Herbal Terra

Ask about any prescription or over-the-counter medication and we check it for interactions with Quina Alcohol Free by Herbal Terra — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Quina Alcohol Free by Herbal Terra

Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.

From our pharmacy team — supplement deep dive

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Jul 11, 2026

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 1 of its 1 active ingredient.
  • No proprietary blends here — you can verify the dose of every single component.

This product contains one active ingredient: quina bark extract, a dried form of cinchona bark. The extract carries quinine and quinidine, alkaloid compounds that have been used historically, though evidence for most modern uses is limited.

The product also contains glycerin and water as inactive ingredients.

Does it work?

Couldn't assess
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed
Not assessable

This is a single-ingredient Cinchona product and its label doesn't state a use — see Cinchona's own graded uses on its monograph.

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.

The effectiveness data we hold shows insufficient evidence for all the conditions quina bark is traditionally used for — cancer, respiratory tract infections, hemorrhoids, influenza, malaria, and muscle cramps. That means the evidence to reliably rate it for these uses just isn't established yet, not that it doesn't work.

Talk to your pharmacist or doctor about whether it's a reasonable choice for what you're considering.

The evidence, ingredient by ingredient Cinchona

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.

Why this rating?
  • We hold adverse-effect (side-effect) data for 1 of the 1 matched ingredient.
  • Pregnancy & breastfeeding safety ratings cover 1 of 1.
  • General safety write-ups exist for 1 of 1.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

This product carries significant safety cautions. Quinine, one of its active compounds, can cause serious side effects, and because this is a bark extract, the dose isn't standardized or controlled.

Prolonged use of high doses can lead to severe problems. The most common adverse effects are diarrhea, nausea, ringing in the ears, and vomiting.

Rare but serious effects include irregular heartbeats, cinchonism (a syndrome from quinine toxicity), and dangerous blood cell disorders including low platelet counts and hemolytic uremic syndrome — a condition that damages your kidneys and blood cells. Watch for bleeding from gums or nose, easy bruising, or unusual spots on your skin, and seek medical attention if these occur.

Side effects, ingredient by ingredient Cinchona

Meds to double-check

Major interaction found
Known Interaction Concern · database check
Major identified

At least one ingredient has a documented Major-severity interaction. Check your medications for a personalized result.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Cinchona.
  • The most serious interaction on file is rated Major.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs; heart-rhythm medications.
  • For scale: 492 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

Stop and check with your pharmacist if you take quinidine or quinine medications (Major risk), or CYP2D6 substrates, QT-prolonging heart drugs, blood thinners or antiplatelet agents, antacids, phenobarbital, or carbamazepine (Moderate risk). No interactions are documented for ingredients we could not check, because this product has only one active ingredient.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with no assessable stated purpose. Major medication interactions have been identified, and safety information is well characterized.

Quina Alcohol Free is not a first-line choice for most people because the evidence for its traditional uses is weak and the interaction and safety risks are substantial. If you take any prescription medications — especially heart, blood thinner, seizure, or any drug your liver metabolizes — you must check them against this product before starting.

Talk with your pharmacist about whether this is right for you and what to watch for.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Dec 21, 2024.

This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed

At a glance

General information

Key facts about Quina Alcohol Free, straight from the product label.

Brand Herbal Terra
Barcode (UPC) 7238360516326
Net contents 2 Fluid Ounce(s); 60 mL
Market status On market
Date entered into DSLD Dec 21, 2024
DSLD ID 324480
Product type Botanical
Supplement form Liquid
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Gluten Free, Sugar Free
From the label
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.

Supplement Facts

The label details for Quina Alcohol Free by Herbal Terra, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
1 mL
Maximum serving Sizes:
1 mL
Servings per container
60
UPC/BARCODE
7238360516326
IngredientAmount% DV
Quina Bark Extract, Dry1156 mg--

Other ingredients: Glycerin, Water

Tap any ingredient to jump to its full detail below.

Label statements
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
Suggested/Recommended/Usage/Directions

Shake well before use. Adults take up to 30 drops (1 mL, one full squeeze of the dropper bulb) in 3-4 fl. oz. of juice or water up to 4 times a day.

Precautions

We recommend to seek expert medical advice before taking. May have contraindications and cause adverse reaction.

Consult a physician before giving to children under 18, before using during pregnancy, if nursing, or if you are on any medications.

Consult a physician before giving to children under 18, before using during pregnancy, if nursing, or if you are on any medications. Keep out of the reach of children!

Do not use if you are allergic to any ingredients.

Storage

Store in a cool, dry, dark place.

FDA Disclaimer Statement

This product has not been evaluated by the FDA and is not intended to diagnose, treat, cure or prevent any disease.

Formulation

cGMP Made in compliance with cGMP 21 CFR 111 in an FDA registered and inspected facility.

Sugar free

Expertly extracted 100% natural Premium product

No alcohol (ethyl), artificial ingredients, color additives, fillers or binders.

Natural Gluten free

Formula

Cinchona officinalis

FDA Statement of Identity

Herbal Supplement

Seals/Symbols

Made in USA

General Statements

Organic raw material.

Is this label outdated? Report a formula or label change and our pharmacy team will review it.

See for yourself

Quina Alcohol Free by Herbal Terra label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

Quina Alcohol Free label

Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.

View the full label (PDF)
What’s inside

The Ingredients in Quina Alcohol Free by Herbal Terra

This is the 1 active ingredient this product is made of. Select it to open its full monograph.

Serving size1 mL Dosage formLiquid Servings per container60 Amounts shown are per serving.

Quina Bark Extract, Dry

Interacts with
492 drugs
1156 mg per serving Form: Cinchona officinalis Bark Extract, Dry

Cinchona bark is the natural source of quinine and has been used for centuries to treat malaria and fever, but the bark itself is not standardized and...

Quina Bark Extract, Dry monograph & interactions

Other (inactive) ingredients: Glycerin, Water. These complete the product’s ingredient list but are not active constituents.

Interaction report

Quina Alcohol Free by Herbal Terra Drug Interactions

Want to check YOUR meds against Quina Alcohol Free?

Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.

 Go to the checker
492Drugs
3 Major 473 Moderate 16 Minor

Ingredients driving the most interactions

Quina Bark Extract, Dry 492

Individual Drug Interactions

The ingredients in Quina Alcohol Free interact with 492 drugs. Click any drug to see the details.

1 of the 1 ingredient in Quina Alcohol Free interact with drugs. Each result below shows which ingredient is responsible. Quina Bark Extract, Dry

Each ingredient & the kinds of drugs it affects

For each ingredient in Quina Alcohol Free with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.

Quina Bark Extract, Dry11 drug types · 492 drugs

Quinidine

Theoretically, taking cinchona might increase plasma levels and adverse effects of quinidine.
Cinchona contains quinidine.

Likelihood Probable Evidence D
Quinine

Theoretically, taking cinchona might increase plasma levels and adverse effects of quinine.
Cinchona contains quinine.

Likelihood Probable Evidence D
Antacids

Theoretically, taking cinchona might decrease the effectiveness of antacids. Theoretically, taking antacids might also increase the risk of adverse effects from cinchona.
Some research shows that taking cinchona lowers stomach acid pH. In addition, some research shows that taking antacids might increase urinary pH. Theoretically, this may increase the amount of quinidine, a constituent of cinchona, reabsorbed in the renal tubules and increase the risk of quinidine toxicity.

Likelihood Possible Evidence D
Anticoagulant/Antiplatelet Drugs

Theoretically, taking cinchona might increase the drug effects and risk of bleeding with anticoagulant and antiplatelet drugs.
In vitro evidence shows that the alkaloids quinine, quinidine, and cinchonine, constituents of cinchona, inhibit platelet aggregation.

Likelihood Possible Evidence D
Carbamazepine (Tegretol)

Theoretically, taking cinchona might increase the adverse effects of carbamazepine.
Clinical research shows that taking quinine, a constituent of cinchona, increases the peak plasma concentration and area under the curve of carbamazepine.

Likelihood Probable Evidence B
Cytochrome P450 2D6 (Cyp2D6) Substrates

Theoretically, taking cinchona might inhibit cytochrome P450 2D6 (CYP2D6) and increase levels of drugs metabolized by this enzyme.
Quinidine, a constituent of cinchona, inhibits CYP2D6-mediated metabolism in humans.

Likelihood Possible Evidence D
Digoxin (Lanoxin)

Theoretically, taking cinchona might increase serum levels of digoxin.
Quinine and quinidine, which are constituents of cinchona, decrease clearance of digoxin and increase serum digoxin levels in humans.

Likelihood Possible Evidence D
Phenobarbital (Luminal)

Theoretically, taking cinchona might increase the adverse effects of phenobarbital.
Clinical research shows that taking quinine, a constituent of cinchona, increases the peak plasma concentration and area under the curve of phenobarbital.

Likelihood Probable Evidence D
Qt Interval-Prolonging Drugs

Theoretically, taking cinchona with other QT interval-prolonging drugs might cause an additive effect and increase the risk of ventricular arrhythmias.
Quinidine and quinine, which are constituents of cinchona, prolong the QT interval.

Likelihood Possible Evidence D
H2-Blockers

Theoretically, taking cinchona might decrease the effectiveness of H2-blockers.
Some research shows that taking cinchona lowers stomach acid pH.

Likelihood Possible Evidence D
Proton Pump Inhibitors (Ppis)

Theoretically, taking cinchona might decrease the effectiveness of PPIs.
Some research shows that taking cinchona lowers stomach acid pH.

Likelihood Possible Evidence D
Quina Bark Extract, Dry full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Quina Alcohol Free, from the product label.

Herbal Terra

See all Herbal Terra products
Name
Herbal Terra LLC
Phone Number
+18083857868
Web Address
herbalterra.com
Pharmacist Counseling Corner

Quina Alcohol Free by Herbal Terra: Common Questions

Does Quina Alcohol Free by Herbal Terra interact with any medications?
Yes. Based on its ingredients, Quina Alcohol Free has a known interaction with 492 medications, including 3 rated major. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Quina Alcohol Free contains a single active ingredient, and that one ingredient can interact with many different medications on its own. We check it against each medication and show the mechanism responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Can I take this while I'm pregnant or breastfeeding?
No. The quinine in this product is likely unsafe in pregnancy and may harm the baby. If you're breastfeeding, safety isn't established and quinine can pass into breast milk, so it should be avoided. Talk with your doctor or pharmacist before using this product in either situation.
What are the most common side effects?
The most common side effects are diarrhea, nausea, ringing in the ears, and vomiting. If you experience these, especially if they're severe or persistent, let your pharmacist or doctor know.
Is this product dose-controlled?
No. Because it's a bark extract, the exact amount of active compounds varies, so the dose isn't standardized. This is one reason the product carries a caution label — you can't be certain how much quinine you're getting with each dose.
Does this really work for muscle cramps, malaria, or the other uses listed?
The evidence we hold shows insufficient data to reliably rate it for any of those uses — muscle cramps, malaria, influenza, respiratory infections, hemorrhoids, or cancer. That doesn't mean it's been proven not to work, but we don't have enough solid research to say whether it does. Your doctor or pharmacist can advise whether it makes sense for you.
What's cinchonism and should I worry about it?
Cinchonism is a syndrome caused by quinine toxicity — it's a rare but serious adverse effect. It can develop with prolonged use of high doses. If you notice unusual symptoms like severe nausea, ringing ears, or irregular heartbeats after taking this product, contact your doctor right away.

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

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Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.

Quina Alcohol Free label
Go deeper

The Full Monographs Behind Quina Alcohol Free’s Ingredients

Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.

Herb & supplement monograph

Cinchona

Interacts with 492 drugs

Cinchona bark is the natural source of quinine and has been used for centuries to treat malaria and fever, but the bark itself is not standardized and can be unpredictable and risky. Modern...

Read the full Cinchona monograph →
Sources

Sources & How We Checked

Quina Alcohol Free's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

The 15 references behind this product’s interaction data

Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.

Cinchona 15 references
  1. The Review of Natural Products by Facts and Comparisons. St. Louis, MO: Wolters Kluwer Co., 1999.
  2. Wichtl MW. Herbal Drugs and Phytopharmaceuticals. Ed. N.M. Bisset. Stuttgart: Medpharm GmbH Scientific Publishers, 1994.
  3. Leung AY, Foster S. Encyclopedia of Common Natural Ingredients Used in Food, Drugs and Cosmetics. 2nd ed. New York, NY: John Wiley & Sons, 1996.
  4. McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
  5. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
  6. Brinker F. Herb Contraindications and Drug Interactions. 2nd ed. Sandy, OR: Eclectic Medical Publications, 1998.
  7. Holt GA. Food & Possible Interactions with Drugs: Revised and Expanded Ed. Chicago, IL: Precept Press, 1998.
  8. Hardman JG, Limbird LL, Molinoff PB, eds. Goodman and Gillman's The Pharmacological Basis of Therapeutics, 9th ed. New York, NY: McGraw-Hill, 1996.
  9. Hansten PD, Horn JR. Drug Interactions Analysis and Management. Vancouver, WA: Applied Therapeutics Inc., 1997 and updates.
  10. Amabeoku GJ, Chikuni O, Akino C, Mutetwa S. Pharmacokinetic interaction of single doses of quinine and carbamazepine, phenobarbitone and phenytoin in healthy volunteers. East Afr Med J 1993;70:90-3.
  11. Shah BH, Nawaz Z, Virani SS, Ali IQ, Saeed SA, Gilani AH.The inhibitory effect of cinchonine on human platelet aggregation due to blockade of calcium influx. Biochem Pharmacol 1998;56:955-60. PubMed
  12. US Food and Drug Administration notice: Drug products containing quinine - enforcement action dates. Docket # 2006N-0476. Federal Register 2006 (December 15);71 (241): 75557-60.
  13. FDA Drug Safety Communication: New risk management plan and patient medication guide for Qualaquin (quinine sulfate). 07-08-2010. https://www.fda.gov/Drugs/DrugSafety/PostmarketDrugSafetyInformationforPatientsandProviders/ucm218202 (accessed 02/18/17).
  14. Dooms-Goossens A, Deveylder H, Duron C, et al. Airborne contact urticaria due to cinchona. Contact Dermatitis 1986;15(4):258. PubMed
  15. Bramer SL, Suri A. Inhibition of CYP2D6 by quinidine and its effects on the metabolism of cilostazol. Clin Pharmacokinet. 1999;37 Suppl 2:41-51. PubMed

See these in context on the Cinchona monograph →

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

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