Drug & supplement interaction

Golden Ragwort + Mefloquine

Mefloquine brand name: Lariam.

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 Golden Ragwort and Mefloquine 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 label for Mefloquine states a food rule worth keeping to, and 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

Golden Ragwort and Mefloquine

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 Mefloquine and Golden Ragwort 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.

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.

Golden Ragwort safety at a glance

Golden Ragwort overall Avoid It contains pyrrolizidine alkaloids that can be toxic to the liver.
Pregnancy Likely Unsafe When used orally. Golden ragwort preparations containing hepatotoxic pyrrolizidine alkaloid (PA) constituents might be teratogenic and hepatotoxic. There is ins... Read the full pregnancy detail
Breastfeeding Likely Unsafe When used orally. Hepatotoxic pyrrolizidine alkaloid (PA) constituents in golden ragwort are excreted in breast-milk. There is insufficient reliable information... Read the full breastfeeding detail

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center) — the full detail is in the Special populations card below. Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Mefloquine and Golden Ragwort? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Mefloquine

Interactions in our licensed database are recorded against drug classes, not just single drug names. Mefloquine is filed under 2 classifications — seizure threshold lowering drugs, oral drugs. Golden Ragwort has documented interactions with 1 drug class — the most serious being cytochrome p450 3a4 (cyp3a4) inducers (moderate) — and none of Mefloquine’s classifications are among them.

Classification data comes from our licensed Natural Medicines dataset. A medication can belong to classes beyond those recorded there, so this describes how the check was run — it is not a safety guarantee.

Keep it in perspective

Golden Ragwort Does Interact With Other Medications

Golden Ragwort has 87 moderate known drug interactions in our database — Mefloquine isn’t one of them. If you take anything else, check it against the full list below.

Moderate 87 No known interaction 2,743 (incl. Mefloquine)
Taking anything else?

Check Another of Your Medications Against Golden Ragwort

Covers the 2,830 medications we’ve checked against Golden Ragwort. Pick one to open its full report.

What to actually watch for

No Interaction Found — But Data Suggests Golden Ragwort and Mefloquine 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. 2 of them are worth acting on rather than waiting out — marked below.

  • Raised blood pressure Worth acting on Additional detail

    Golden Ragwort

    “Orally, the major concern with golden ragwort use is its pyrrolizidine alkaloid (PA) content. These constituents can cause lung damage with pulmonary-arterial hypertension.”

    Golden Ragwort · Natural Medicines adverse-effect record, reported in hypertension.

    2 sources cited
    1. 12841. Chojkier M. Hepatic sinusoidal-obstruction syndrome: toxicity of pyrrolizidine alkaloids. J Hepatol 2003;39:437-46. PubMed
    2. 12842. Roeder E. Medicinal plants in Europe containing pyrrolizidine alkaloids. Pharmazie 1995;50:83-98.

    Mefloquine

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

  • Liver problems Worth acting on Additional detail

    Golden Ragwort

    “Orally, the major concern with golden ragwort use is its pyrrolizidine alkaloid (PA) content. These constituents can cause liver injury. Chronic exposure to other plants containing hepatotoxic PA constituents is associated with veno-occlusive disease. Subacute veno-occlusive disease can cause vague symptoms, including colicky pains, vomiting, diarrhea, and ascites within several days;”

    Golden Ragwort · Natural Medicines adverse-effect record, reported in diarrhea.

    3 sources cited
    1. 12841. Chojkier M. Hepatic sinusoidal-obstruction syndrome: toxicity of pyrrolizidine alkaloids. J Hepatol 2003;39:437-46. PubMed
    2. 12842. Roeder E. Medicinal plants in Europe containing pyrrolizidine alkaloids. Pharmazie 1995;50:83-98.
    3. 4021. WHO working group. Pyrrolizidine alkaloids. Environmental Health Criteria, 80. WHO: Geneva, 1988.

    Mefloquine

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

  • Diarrhea / Vomiting Additional detail

    Golden Ragwort

    Recorded for Golden Ragwort in the same Natural Medicines adverse-effect record shown under Liver problems above.

    Mefloquine

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

Effects for Mefloquine come from the ADVERSE REACTIONS section of its FDA label; effects for Golden Ragwort 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.

Special populations

Golden Ragwort in Pregnancy & Breastfeeding

Pregnancy Likely Unsafe

When used orally. Golden ragwort preparations containing hepatotoxic pyrrolizidine alkaloid (PA) constituents might be teratogenic and hepatotoxic. There is insufficient reliable information available about the safety of using golden ragwort products that do not contain hepatotoxic PAs during pregnancy.

Lactation Likely Unsafe

When used orally. Hepatotoxic pyrrolizidine alkaloid (PA) constituents in golden ragwort are excreted in breast-milk. There is insufficient reliable information available about the safety of using golden ragwort products that are PA-free during lactation; 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

How to take them

Some Mefloquine Products Have a Food Rule — Golden Ragwort Should Not Break It

At least one FDA label for a product containing Mefloquine says to take it on an empty stomach. Most supplements — Golden Ragwort included — are taken with a meal, so the easy mistake is swallowing both together at breakfast. Where that rule applies, keep Mefloquine on its own and move Golden Ragwort to a meal later in the day.

This may not be true of your version. Food instructions belong to the product, not the ingredient: two Mefloquine products can carry different directions, and extended-release forms often differ from immediate-release ones. The label we read is quoted below — check the directions on your own box or bottle, or ask your pharmacist, for how to take the exact product you were given.

The drug should not be taken on an empty stomach and should be administered with at least 8 oz (240 mL) of water.

From the Dosage and Administration section of the FDA label we read for Mefloquine — where that label names a specific product, the instruction is that product's. Read the label on DailyMed ›

A food rule is not an interaction — it is about how much of the medicine you absorb. The directions that came with your own product, and your pharmacist, outrank anything on this page.

Everything else you take

See Every Supplement That Interacts With Mefloquine

This page covers Golden Ragwort only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Mefloquine page lists 23 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Biofeedback (moderate), Coffee Charcoal (moderate), Dendrobium (moderate) and European Mandrake (moderate).

By severity: 1 major · 13 moderate · 9 minor.

From our pharmacist’s overview on the Mefloquine page

“Mefloquine (Lariam) prevents and treats malaria and carries its own well-known warnings about seizures and psychiatric effects, so I take this interaction list more seriously than most. Six of the 23 supplements on file, including ginkgo and melatonin, may lower the seizure threshold, a poor match for a drug with mefloquine's neurologi…”

Reviewed by 2 · Jul 18, 2026

Open the Mefloquine interaction page

One more smart check

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

We hold 2 real supplement products containing Golden Ragwort, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Golden Ragwort. Even though Golden Ragwort itself has no known interaction with Mefloquine, 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 Golden Ragwort and Mefloquine 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 Golden Ragwort
Top half

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

29 days ago today
Medication Mefloquine
Steady interest

#1,570 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 Golden Ragwort reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Golden Ragwort and Mefloquine 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 Golden Ragwort

What is Golden Ragwort?

  • Menstrual complaints
  • Easing childbirth (traditional)
  • Urinary discomfort
  • Sore throat (folk use)

Golden Ragwort is a flowering plant once used in traditional and folk medicine, mainly for menstrual and female reproductive complaints. It contains pyrrolizidine alkaloids that can cause serious liver damage, so it is not considered safe for internal use, and modern herbalists generally avoid it.

Packera aurea · Asteraceae · Aerial parts (leaves, stems, flowers) and roots · Tea, tincture, dried herb

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

Golden Ragwort: dosing

There is no established safe dose for Golden Ragwort, and no standardized products are recommended. Because it contains liver-toxic pyrrolizidine alkaloids, health authorities generally advise against taking it at all.If you come across a product that contains this plant, do not assume any amount is safe.

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

Read the full Golden Ragwort monograph & all interactions
Medication

About Mefloquine

What Is Mefloquine Used For?

Brand name: Lariam

Mefloquine Hydrochloride tablets are used to treat mild to moderate malaria caused by P. falciparum (including strains resistant to chloroquine) or P. vivax. They are also used to prevent malaria caused by these two parasite species, including chloroquine-resistant strains of P. falciparum, in people traveling to or living in areas where malaria is common.

Important note: Mefloquine does not eliminate the liver-stage parasites of P. vivax, so patients treated for P. vivax malaria will need a follow-up medication (such as primaquine) to prevent the infection from coming back. For life-threatening or severe malaria, an intravenous antimalarial is used first; mefloquine may then be given to complete the course.

See full Mefloquine drug information
Keep checking

Other Drugs & Golden Ragwort

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

0Major
87Moderate
0Minor
2,742No known interaction
87 Moderate 2,742 No interaction
Moderate

87 interactions

Showing 60 of 87 moderate interactions — see all 87 on the Golden Ragwort page.

No interaction 2,742 drugs checked — show the list

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

Showing the 60 most looked-up of 2,742 medications checked with no known interaction — see the full Golden Ragwort list.

See the full Golden Ragwort interactions page
See every supplement checked against Mefloquine, ranked by severity
Evidence & sources

Golden Ragwort References

The 4 references that drive our Golden Ragwort 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. WHO working group. Pyrrolizidine alkaloids. Environmental Health Criteria, 80. WHO: Geneva, 1988.
  2. Chojkier M. Hepatic sinusoidal-obstruction syndrome: toxicity of pyrrolizidine alkaloids. J Hepatol 2003;39:437-46. PubMed
  3. Roeder E. Medicinal plants in Europe containing pyrrolizidine alkaloids. Pharmazie 1995;50:83-98.
  4. Wang YP, Yan J, Fu PP, Chou MW. Human liver microsomal reduction of pyrrolizidine alkaloid N-oxides to form the corresponding carcinogenic parent alkaloid. Toxicol Lett 2005;155:411-20. PubMed

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 Golden Ragwort and Mefloquine Together: Common Questions

Is it safe to take Golden Ragwort with Mefloquine?
We do not list a known interaction between Golden Ragwort and Mefloquine. 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 Golden Ragwort and Mefloquine have any of the same side effects?
Yes — our sources link each of them separately to 4 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.
Should I take Golden Ragwort and Mefloquine at the same time of day?
At least one FDA label for a product containing Mefloquine says to take it on an empty stomach, and supplements are usually taken with a meal — so taking them together at breakfast is the easy mistake. Where that applies, keep Mefloquine on its own and move Golden Ragwort to a meal later in the day. Food instructions belong to the product rather than the ingredient, so check the directions on your own box. This is about absorption, not an interaction.
How was the Golden Ragwort and Mefloquine combination checked?
Interactions in our licensed database are recorded against drug classes. Mefloquine is filed under 2 classifications, and Golden Ragwort has documented interactions with 1 drug class — none of Mefloquine's classifications are among them. A medication can belong to classes beyond those recorded in our dataset, so this describes how the check was run rather than guaranteeing safety.
Does Golden Ragwort interact with any other medications?
Yes. Golden Ragwort has 87 documented drug interactions in our database — Mefloquine is simply not one of them. If you take anything else, it is worth checking each one; they are all listed on this page.
Does Mefloquine interact with any supplements?
Yes. Mefloquine has documented interactions with 23 supplements in our database — Golden Ragwort is not one of them. The Mefloquine 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

Golden Ragwort monograph Uses, safety profile, and every drug interaction in one place Mefloquine drug information The full plain-English guide to this medication Mefloquine supplement interactions Every supplement checked against Mefloquine, 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 4 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Mefloquine and Golden Ragwort?

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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.