Drug & supplement interaction

Angostura + Flucytosine

Flucytosine brand names: Ancobon, Ancotil.

No Known Interaction
Medically reviewed by · Updated July 2026 · Pair last verified Sep 13, 2026
The bottom line No known interaction

We found no known interaction between Angostura and Flucytosine in our sources. Absence of a documented interaction is not the same as proven safety, and does not guarantee one does not exist. Do not start, stop, or change a medication or supplement based on this page; confirm with your pharmacist or doctor first. Additionally, although there is no interaction, the two are separately associated with some of the same side effects, which would make a new symptom harder to attribute to one or the other.

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Interaction report

Angostura and Flucytosine

We checked these two against our interaction database. Here is what we found.

No Known Interaction Found

We did not find a documented interaction between Flucytosine and Angostura in our sources. This does not guarantee that the combination is completely free of risk — there is often limited research on supplements and herbal products, especially around drug interactions.

Worth understanding: our licensed dataset holds no drug-interaction record for Angostura at all — not against Flucytosine, and not against any other medication we track. This verdict therefore rests on the absence of any recorded data, not on research that looked at this combination and found nothing. We cannot rule an interaction out.

If you decide to take both, the practical routine is simple: add one new thing at a time and note the date you started it. If the combination is going to disagree with you, it usually shows in the first days to a couple of weeks — and a start date turns “I’ve been feeling off” into something a pharmacist can actually work with. Do not stop a prescribed medicine on your own.

Always talk with your pharmacist or doctor before making changes to your medications or supplements, particularly if you take several medications or have an ongoing health condition.

Angostura safety at a glance

Angostura overall Use caution Considered safe in tiny amounts as a food flavoring, but medicinal doses are not well studied and large amounts can be harmful.
Pregnancy Avoid Not enough safety information is available, so it is best avoided during pregnancy.
Breastfeeding Avoid There is no reliable safety data, so avoid medicinal use while breastfeeding.

Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Flucytosine and Angostura? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

No Interaction Found — But Data Suggests Angostura and Flucytosine May Share Several of the Same Side Effects

This is not an interaction. Neither one changes how your body handles the other, and nothing here says they react together. What our sources do show is that each has separately been linked to the effects below — so taking both can make those effects more likely to turn up, and harder to pin on one or the other if they do.

  • Vomiting / Nausea Additional detail

    Angostura

    “Orally, angostura is well tolerated when used in amounts commonly found in foods. Large doses of angostura may cause nausea and vomiting (18).”

    Angostura · Natural Medicines adverse-effect record, reported in nausea and vomiting.

    2 sources cited
    1. 4912. Electronic Code of Federal Regulations. Title 21. Part 182 -- Substances Generally Recognized As Safe. Available at: https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/CFRSearch.cfm?CFRPart=182
    2. 18. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.

    “Orally, large doses of angostura may cause nausea and vomiting (18).”

    Angostura · Natural Medicines adverse-effect record, reported in nausea and vomiting.

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

    Flucytosine

    Listed in the ADVERSE REACTIONS section of the FDA label for Flucytosine. Read the label on DailyMed ›

Effects for Flucytosine come from the ADVERSE REACTIONS section of its FDA label; effects for Angostura come from the Natural Medicines adverse-effect record, quoted above. Wording is matched across sources by our own clinical vocabulary, so treat this as a prompt to pay attention, not a diagnosis.

Everything else you take

See Every Supplement That Interacts With Flucytosine

This page covers Angostura only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Flucytosine page lists 40 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Alfalfa (moderate), Angelica Archangelica (moderate), Arrach (moderate) and Bergamot (moderate).

By severity: 1 major · 26 moderate · 13 minor.

Open the Flucytosine interaction page

One more smart check

Taking Angostura as Part of a Dietary Supplement Product? Check It for Interactions

We hold 1 real supplement products containing Angostura, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Angostura. Even though Angostura itself has no known interaction with Flucytosine, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:

How much people look this up

Where Angostura and Flucytosine Sit Against Everything Else

Out of every supplement and medication people look up on HelloPharmacist, here is where these two land this week — and which way each has been moving.

Supplement Angostura
Steady interest

#1,273 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Flucytosine
Top half

#1,413 of 2,830 medications looked up here in the last 7 days

29 days ago today

Position among everything looked up on this site, not a measure of how commonly either one is used or how important it is. A supplement can climb this list because of a news story. It counts every request to the page, automated ones included, and nothing here identifies anyone.

Where does our data come from?
  • Source: the Natural Medicines (TRC Healthcare) clinical database — the evidence-graded professional reference for herb & supplement interactions.
  • Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every Angostura reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Angostura and Flucytosine records this page draws on were last updated July 11, 2026.
  • What “no known interaction” means: no documented interaction in the sources above — not a guarantee of safety. Supplements are studied far less than prescription drugs, so we say exactly what the evidence supports, and nothing more.
Data structure & sourcing designed and verified by .
Supplement

About Angostura

What is Angostura?

Angostura
  • Digestive upset and poor appetite
  • Fever
  • Diarrhea
  • Malaria prevention (traditional)
  • Muscle spasms

Angostura is the bark of a South American tree traditionally used to ease digestion, fevers, and stomach problems. Modern human evidence to support these uses is very limited, and large doses can cause vomiting and other harmful effects. It is best known today as a historic flavoring ingredient, and you should talk with a pharmacist or doctor before using it medicinally.

Angostura trifoliata · Rutaceae · Bark · Bark powder, tincture, extract, and as a flavoring in some alcoholic beverages

An interaction check asks whether these two react with each other — it does not ask whether Angostura is a good idea for someone in your situation. Here is what our Angostura record says about it on its own.

Angostura: dosing

There is no well-established, standardized medicinal dose for angostura. Traditional uses vary widely, and there is not enough reliable research to recommend a safe and effective amount.If you choose to use a product that contains angostura, follow the directions on the product label and do not exceed them, since larger amounts can cause vomiting and diarrhea.

From our Angostura monograph — the full record covers uses, side effects and every documented interaction.

Read the full Angostura monograph & all interactions
Keep checking

Other Drugs & Angostura

Browse every other medication we’ve checked against Angostura — both the ones with a known interaction and the ones without. Select any drug for the full detail.

0Major
0Moderate
0Minor
2,829No known interaction
2,829 No interaction
No interaction 2,829 drugs checked — show the list

We also checked Angostura against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full Angostura list.

See the full Angostura interactions page
See every supplement checked against Flucytosine, ranked by severity
Evidence & sources

Angostura References

The 2 references that drive our Angostura 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. Electronic Code of Federal Regulations. Title 21. Part 182 -- Substances Generally Recognized As Safe. Available at: https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/CFRSearch.cfm?CFRPart=182

Medication overviews come from MedlinePlus (NIH); supplement label data from the NIH Dietary Supplement Label Database. Content is written and reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

Pharmacist Counseling Corner

Taking Angostura and Flucytosine Together: Common Questions

Is it safe to take Angostura with Flucytosine?
We do not list a known interaction between Angostura and Flucytosine. That does not guarantee the combination is risk-free, so confirm with your pharmacist or doctor — especially if you take other medications or have a health condition.
Do Angostura and Flucytosine have any of the same side effects?
Yes — our sources link each of them separately to 2 of the same effects. That is not an interaction: neither changes how your body handles the other. It does mean that if one of those effects turns up, it can be harder to tell which one is behind it. They are listed on this page with the source behind each.
Does Flucytosine interact with any supplements?
Yes. Flucytosine has documented interactions with 40 supplements in our database — Angostura is not one of them. The Flucytosine interaction page linked on this page lists every one, ranked by severity.

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

Where next

Keep Exploring

Angostura monograph Uses, safety profile, and every drug interaction in one place Flucytosine supplement interactions Every supplement checked against Flucytosine, ranked by severity Supplement interaction checker Check any supplement or product against your medications Browse medications A–Z Every drug we’ve checked against herbs & supplements References The 2 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Flucytosine and Angostura?

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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.