Drug & supplement interaction

Golden Ragwort + Rifapentine

Rifapentine brand name: Priftin.

Moderate Interaction
Medically reviewed by · Updated September 2026
The bottom line Moderate

Golden Ragwort has a moderate interaction with Rifapentine. Theoretically, CYP3A4 inducers might increase the risk of adverse effects from the pyrrolizidine alkaloid (PA) constituents in golden ragwort.

Read the full interaction report
SeverityModerate
LikelihoodPossible
EvidenceD
What do Severity, Likelihood & Evidence mean?
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Interaction report

Golden Ragwort and Rifapentine

Here is the interaction we found between these two, with the evidence behind it.

Moderate

CYTOCHROME P450 3A4 (CYP3A4) INDUCERS

Why this applies to Rifapentine

Rifapentine falls under CYTOCHROME P450 3A4 (CYP3A4) INDUCERS — the group Golden Ragwort interacts with.

Theoretically, CYP3A4 inducers might increase the risk of adverse effects from the pyrrolizidine alkaloid (PA) constituents in golden ragwort.
Golden ragwort contains PAs. PAs are substrates of CYP3A4. Theoretically, drugs that induce CYP3A4 might increase the conversion of PAs to toxic metabolites.
Severity Moderate Likelihood Possible Evidence D

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.

Dr. Brian Staiger, PharmD, BCPS
Dr. Brian Staiger explains PharmD, Clinical Pharmacist

Here's the gist of this one. Golden Ragwort contains pyrrolizidine alkaloids, plant chemicals your liver can turn into harmful, reactive byproducts. Rifapentine is a strong CYP3A4 inducer, meaning it revs up that liver enzyme. In theory, that faster enzyme activity could push your liver to convert more of these alkaloids into the toxic forms, raising the chance of liver injury.

I want to be honest about the evidence: this concern comes from lab and animal data, not real patient studies, so it's theoretical. That said, Golden Ragwort isn't considered safe to swallow on its own, and rifapentine already carries some liver risk. Please don't take this herb without first running it by your pharmacist or doctor.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Chojkier M. Hepatic sinusoidal-obstruction syndrome: toxicity of pyrrolizidine alkaloids. J Hepatol 2003;39:437-46. PubMed
  2. 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

What These Ratings Mean

Every interaction above is graded three ways — here’s the key to each label.

Severity how clinically significant the interaction is
Major

Clinically significant. Avoid the combination, or use only under close professional supervision.

Moderate

Usually worth avoiding or managing — may need monitoring, a dose change, or timing apart.

Minor

Generally not serious. Be aware of it and mention it to your pharmacist.

Likelihood how strong the evidence is that the interaction actually happens in people
  • LikelyWell-controlled human studies have demonstrated the likely existence of this interaction.
  • ProbableInteraction 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.
  • PossibleInteraction 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.
  • UnlikelyInteraction has been demonstrated in animal or in lab research but has been shown not to occur in humans.
Evidence the quality of the studies behind the rating (graded A–D)
  • AHigh-quality meta-analysis (quantitative systematic review).
  • BCase-control study.
  • CConsensus.
  • DAnecdotal evidence.

These ratings are for information only. Never start, stop, or otherwise change your therapy before speaking with your provider.

Keep it in perspective

Golden Ragwort Also Interacts With Other Medications

Golden Ragwort has 86 moderate known drug interactions in our database — the Rifapentine one above is one of them. If you take anything else, check it against the full list below.

Moderate 86 No known interaction 2,744 (incl. Rifapentine)
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.

Everything else you take

See Every Supplement That Interacts With Rifapentine

This page covers Golden Ragwort only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Rifapentine page lists 64 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Alkanna (moderate), Alpine Ragwort (moderate), Bacillus Coagulans (moderate) and Bacillus Subtilis (moderate).

By severity: 1 major · 53 moderate · 10 minor.

From our pharmacist’s overview on the Rifapentine page

“Rifapentine (Priftin) treats tuberculosis and is often dosed just once or twice a week, so a single blunted dose costs more than it would with a daily pill. That is why I read this list of 64 interacting supplements as a real warning rather than routine fine print.”

Reviewed by 2 · Jul 18, 2026

Open the Rifapentine 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. Your product may carry other ingredients that interact with Rifapentine too, on top of Golden Ragwort — and those would not show on this page. Find your product and we’ll check every ingredient on its label:

How much people look this up

Where Golden Ragwort and Rifapentine 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

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

29 days ago today
Medication Rifapentine
Top 25%

#623 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.

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.

Read the full Golden Ragwort monograph & all interactions
Medication

About Rifapentine

What Is Rifapentine Used For?

Brand name: Priftin

Rifapentine (brand name Priftin) is used to treat two forms of tuberculosis (TB) caused by Mycobacterium tuberculosis. For active pulmonary TB — an active infection in the lungs — it is approved for patients 12 years and older, always used alongside other TB medicines, never alone. For latent TB infection (LTBI) — where the bacteria are in the body but not causing active illness — it is approved for patients 2 years and older who are at high risk of the infection becoming active, always combined with isoniazid.

Priftin is not appropriate for every TB situation. It should not be used alone at any stage of active TB treatment, and it is not recommended as a once-weekly continuation regimen combined with isoniazid in people living with HIV who have active pulmonary TB, due to a higher risk of treatment failure or relapse.

See full Rifapentine 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
86Moderate
0Minor
2,743No known interaction
86 Moderate 2,743 No interaction
Moderate

86 interactions

Showing 60 of 86 moderate interactions — see all 86 on the Golden Ragwort page.

No interaction 2,743 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 2,743 medications checked with no known interaction — see the full Golden Ragwort list.

See the full Golden Ragwort interactions page
See every supplement checked against Rifapentine, ranked by severity
Sources

Sources & How We Checked

Interaction details are evidence-graded and sourced from the Natural Medicines database. The medication overview comes from MedlinePlus.

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

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

Keep exploring
Golden Ragwort monograph › Uses, safety, and every drug interaction in one place Rifapentine supplement interactions › Every supplement checked against Rifapentine, ranked by severity Rifapentine drug information › The full plain-English guide to this medication Supplement interaction checker › Check any supplement or product against your medications Browse medications A–Z › Every drug we've checked against herbs & supplements Ask a pharmacist › Free, personal answer from our licensed team
Pharmacist Counseling Corner

Taking Golden Ragwort and Rifapentine Together: Common Questions

Can you take Golden Ragwort with Rifapentine?
There is a moderate interaction, so it may be acceptable with monitoring or timing changes — but check with your pharmacist first. Read the full details on this page and confirm with your pharmacist before combining them.
How serious is the Golden Ragwort and Rifapentine interaction?
We rate it Moderate. This combination may require monitoring, a dose adjustment, or separating the times you take each one. Consult your pharmacist before using them together.

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

Still Have a Question About Rifapentine 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.