Autumn Crocus + Rifapentine
Rifapentine brand name: Priftin.
We found no known interaction between Autumn Crocus and Rifapentine 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 Rifapentine 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.
Autumn Crocus and Rifapentine
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 Rifapentine and Autumn Crocus 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.
Autumn Crocus safety at a glance
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.
Why No Interaction Is Listed for Rifapentine
Interactions in our licensed database are recorded against drug classes, not just single drug names. Rifapentine is filed under 4 classifications — including cytochrome p450 2c9 (cyp2c9) inducers, cytochrome p450 3a4 (cyp3a4) inducers, antibiotic drugs. Autumn Crocus has documented interactions with 1 drug class — the most serious being colchicine (major) — and none of Rifapentine’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.
Autumn Crocus Does Interact With Other Medications
Autumn Crocus has 2 major, known drug interactions in our database — Rifapentine isn’t one of them. If you take anything else, check it against the full list below.
Check Another of Your Medications Against Autumn Crocus
We haven’t checked that one against Autumn Crocus yet — ask our pharmacists directly.
Covers the 2,830 medications we’ve checked against Autumn Crocus. Pick one to open its full report.
Autumn Crocus in Pregnancy & Breastfeeding
When used orally. Autumn crocus is a potential mutagen and is associated with significant and potentially fatal adverse effects; 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
Some Rifapentine Products Have a Food Rule — Autumn Crocus Should Not Break It
At least one FDA label for a product containing Rifapentine says to take it with food. If you take Autumn Crocus on an empty stomach out of habit, keep them separate — and take Rifapentine with a meal where the label says to.
This may not be true of your version. Food instructions belong to the product, not the ingredient: two Rifapentine 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.
( 2.2 ) Take with food.
From the Dosage and Administration section of the FDA label we read for Rifapentine — 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.
See Every Supplement That Interacts With Rifapentine
This page covers Autumn Crocus 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
Taking Autumn Crocus as Part of a Dietary Supplement Product? Check It for Interactions
We hold 1 real supplement products containing Autumn Crocus, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Autumn Crocus. Even though Autumn Crocus itself has no known interaction with Rifapentine, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:
Where Autumn Crocus 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.
#956 of 1,452 supplements looked up here in the last 7 days
#2,684 of 2,830 medications looked up here in the last 7 days
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 Autumn Crocus reference on this page ↓
- Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Autumn Crocus and Rifapentine records this page draws on were last updated July 10, 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.
About Autumn Crocus
What is Autumn Crocus?
- Gout
- Familial Mediterranean fever
- Joint pain and inflammation
- Rheumatoid arthritis (traditional use)
Autumn Crocus is a highly poisonous plant that contains colchicine, a compound that has real medical value but is dangerous in its raw form. You should never eat the plant or take homemade preparations from it. If you need colchicine for gout or familial Mediterranean fever, use the standardized, FDA-approved prescription product under a doctor's supervision.
Colchicum autumnale · Colchicaceae · Corm (bulb-like underground stem), seeds, and flowers · Rarely used as a raw plant or crude extract; the purified active compound (colchicine) is available only as an FDA-approved prescription medicine
An interaction check asks whether these two react with each other — it does not ask whether Autumn Crocus is a good idea for someone in your situation. Here is what our Autumn Crocus record says about it on its own.
Autumn Crocus: dosing
There is no safe established dose of the Autumn Crocus plant as a supplement, and it should not be taken in any homemade form. The colchicine content of the plant cannot be reliably measured, so even small amounts can cause serious harm.The only appropriate way to use colchicine is through an FDA-approved prescription product, which has a precise, controlled dose set by your healthcare provider.
From our Autumn Crocus monograph — the full record covers uses, side effects and every documented interaction.
About Rifapentine
What Is Rifapentine Used For?
Brand name: Priftin
Rifapentine tablets — sold as Priftin and as rifapentine tablets — are used to treat two forms of tuberculosis caused by Mycobacterium tuberculosis. For active pulmonary TB (a live TB infection in the lungs), it is approved for adults and children 12 years and older. It must always be combined with other anti-TB drugs — never taken alone.
For latent tuberculosis infection (LTBI) — where TB bacteria are in the body but not yet causing illness — it is approved for adults and children 2 years and older who are at high risk of the infection becoming active. For LTBI, it is always taken together with isoniazid, once weekly for 12 weeks. Active TB disease must be ruled out before starting LTBI treatment.
Most-Reported Side Effects for Rifapentine
From FAERS, the FDA’s public side-effect reporting system (509 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.
Other Drugs & Autumn Crocus
Browse every other medication we’ve checked against Autumn Crocus — both the ones with a known interaction and the ones without. Select any drug for the full detail.
No drugs match “”.
2 interactions
No interaction 2,827 drugs checked — show the list
We also checked Autumn Crocus against these medications and found no known interaction in our sources. Open any page to confirm.
- Apixaban ›
- Levothyroxine ›
- Amlodipine ›
- Methylphenidate ›
- Warfarin ›
- Sertraline ›
- Testosterone ›
- Losartan Potassium ›
- Metoprolol ›
- Aspirin ›
- Ivermectin ›
- Rivaroxaban ›
- Rosuvastatin ›
- Escitalopram ›
- Tadalafil ›
- Acetaminophen ›
- Clopidogrel ›
- Valacyclovir ›
- Atorvastatin ›
- Docusate ›
- Hydroxyurea ›
- Abemaciclib ›
- Methamphetamine ›
- Ibuprofen ›
- Sumatriptan ›
- Semaglutide ›
- Tirzepatide ›
- Warfarin Sodium ›
- Prednisone ›
- Propranolol ›
- Lisdexamfetamine ›
- Acyclovir ›
- Bupropion ›
- Metformin ›
- Amoxicillin ›
- Lisinopril ›
- Bendamustine ›
- Amitriptyline ›
- Doxycycline ›
- Lamotrigine ›
- Fluoxetine ›
- Methotrexate ›
- Acetaminophen, Codeine ›
- Gabapentin ›
- Amphetamine ›
- Pregabalin ›
- Isotretinoin ›
- Dextroamphetamine ›
- Azithromycin ›
- Clonazepam ›
- Quetiapine ›
- Omeprazole ›
- Amlodipine Besylate ›
- Methylene Blue ›
- Duloxetine ›
- Buspirone ›
- Letrozole ›
- Citalopram ›
- Ciprofloxacin ›
- Naproxen ›
Showing the 60 most looked-up of 2,827 medications checked with no known interaction — see the full Autumn Crocus list.
Autumn Crocus References
The 9 references that drive our Autumn Crocus 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.
- Blumenthal M, ed. The Complete German Commission E Monographs: Therapeutic Guide to Herbal Medicines. Trans. S. Klein. Boston, MA: American Botanical Council, 1998.
- The Review of Natural Products by Facts and Comparisons. St. Louis, MO: Wolters Kluwer Co., 1999.
- Brvar, M., Kozelj, G., Mozina, M., and Bunc, M. Acute poisoning with autumn crocus (Colchicum autumnale L.). Wien.Klin Wochenschr. 3-31-2004;116(5-6):205-208. PubMed
- Kritikos A, Spertini O. Reversible granulocyte abnormalities after accidental ingestion of Colchicum autumnale. Blood 2017;130(1):95. doi: 10.1182/blood-2017-02-766410. PubMed
- Nagesh KR, Menezes RG, Rastogi P, et al. Suicidal plant poisoning with Colchicum autumnale. J Forensic Leg Med 2011;18(6):285-7. doi: 10.1016/j.jflm.2011.04.008. PubMed
- Brncic N, Viskovic I, Peric R, et al. Accidental plant poisoning with Colchicum autumnale: report of two cases. Croat Med J 2001;42(6):673-5.
- Sundov Z, Nincevic Z, Definis-Gojanovic M, et al. Fatal colchicine poisoning by accidental ingestion of meadow saffron-case report. Forensic Sci Int 2005;149(2-3):253-6. PubMed
- Boisramé-Helms J, Rahmani H, Stiel L, Tournoud C, Sauder P. Extracorporeal life support in the treatment of colchicine poisoning. Clin Toxicol (Phila) 2015;53(8):827-9.
- Razinger G, Kozelj G, Gorjup V, Grenc D, Brvar M. Accidental poisoning with autumn crocus (Colchicum autumnale): a case series. Clin Toxicol (Phila). 2021 Jun;59(6):493-9.
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.
Rifapentine Is Linked to Lower Levels of 7 Nutrients
Natural Medicines records Rifapentine as a medicine that can lower these. This is not an interaction with Autumn Crocus — it is a separate effect of the medicine, and it is a reason some people are advised to supplement rather than to avoid one:
Read the full Rifapentine nutrient depletion report ›
Depletion records come from the licensed Natural Medicines database. Do not start a supplement on the strength of this page — ask your pharmacist or doctor whether it applies to you.
Taking Autumn Crocus and Rifapentine Together: Common Questions
Is it safe to take Autumn Crocus with Rifapentine?
Do Autumn Crocus and Rifapentine have any of the same side effects?
Should I take Autumn Crocus and Rifapentine at the same time of day?
How was the Autumn Crocus and Rifapentine combination checked?
Does Autumn Crocus interact with any other medications?
Does Rifapentine interact with any supplements?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
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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.