Yellow Toadflax + Interferon Alfa-2b
Interferon Alfa-2b brand names: Rebetron, Intron A, Viraferon.
We found no known interaction between Yellow Toadflax and Interferon Alfa-2b 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.
Yellow Toadflax and Interferon Alfa-2b
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 Interferon Alfa-2b and Yellow Toadflax 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 Yellow Toadflax at all — not against Interferon Alfa-2b, 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.
Yellow Toadflax safety at a glance
Safety guidance is general; always confirm with your pharmacist or doctor for your situation.
See Every Supplement That Interacts With Interferon Alfa-2b
This page covers Yellow Toadflax only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Interferon Alfa-2b page lists 57 supplements it has a documented interaction with, worst first, each one explained.
The most serious there right now: Beer (major), Siberian Cocklebur (major), Wine (major), Alfalfa (moderate) and Angelica Archangelica (moderate).
By severity: 3 major · 53 moderate · 1 minor.
From our pharmacist’s overview on the Interferon Alfa-2b page
“People taking interferon alfa-2b (Intron A, Rebetron) are usually treating hepatitis or a cancer, so the liver may already be under strain, and that is exactly where most of this list points. Of the 57 supplements on file, 38 can add to liver stress, and all three major-rated interactions sit in that group: Siberian cocklebur, which ha…”
Reviewed by 2 · Jul 18, 2026
Where Yellow Toadflax and Interferon Alfa-2b 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.
#1,219 of 1,452 supplements looked up here in the last 7 days
#1,580 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. Yellow Toadflax is not yet covered by that licensed database, so its write-up cites publicly available medical sources directly (see the references below).
- Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every Yellow Toadflax reference on this page ↓
- Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Yellow Toadflax and Interferon Alfa-2b records this page draws on were last updated June 22, 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 Yellow Toadflax
What is Yellow Toadflax?
- Hemorrhoids and skin irritation
- Mild constipation
- Fluid retention (as a folk diuretic)
- Liver and gallbladder complaints (traditional)
- Minor wounds and inflammation (topical)
Yellow toadflax is a traditional folk remedy used mostly for hemorrhoids, skin problems, and as a mild laxative or diuretic, but there is very little modern human research to confirm any of these uses. Because its safety has not been well studied, it is best used cautiously, avoided in pregnancy and breastfeeding, and discussed with a pharmacist or doctor first.
Linaria vulgaris · Plantaginaceae · Aerial parts (flowering tops, leaves, and stems) · Tea, tincture, dried herb, ointment or salve, poultice
An interaction check asks whether these two react with each other — it does not ask whether Yellow Toadflax is a good idea for someone in your situation. Here is what our Yellow Toadflax record says about it on its own.
Yellow Toadflax: dosing
There is no well-established or standardized dose for yellow toadflax. Traditional preparations vary widely, and modern guidelines for safe amounts do not exist.If you choose to use a commercial product, follow the directions on the label and do not exceed them.
From our Yellow Toadflax monograph — the full record covers uses, side effects and every documented interaction.
About Interferon Alfa-2b Injection
What Is Interferon Alfa-2b Injection Used For?
Brand names: Rebetron, Intron A, Viraferon
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Interferon alfa-2b injection is used to treat a number of conditions.
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Interferon alfa-2b injection is used
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alone or in combination with ribavirin (Copegus, Rebetol, Ribasphere) to treat chronic (long-term) hepatitis C infection (swelling of the liver caused by a virus) in people who show signs of liver damage,
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to treat chronic hepatitis B infection (swelling of the liver caused by a virus) in people who show signs of liver damage,
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to treat hairy cell leukemia (a white blood cell cancer),
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to treat genital warts,
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to treat Kaposi's sarcoma (a type of cancer that causes abnormal tissue to grow on different parts of the body) related to acquired immunodeficiency syndrome (AIDS),
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to treat malignant melanoma (a cancer that begins in certain skin cells) in certain people who have had surgery to remove the cancer,
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along with another medication to treat follicular non-Hodgkin's lymphoma (NHL; a slow-growing blood cancer).
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Interferon alfa-2b is in a class of medications called immunomodulators. Interferon alfa-2b works to treat hepatitis C virus (HCV) and hepatitis B virus (HBV) by decreasing the amount virus in the body. Interferon alfa-2b may not cure hepatitis B or hepatitis C or prevent you from developing complications from these infections such as cirrhosis (scarring) of the liver, liver failure, or liver cancer. It also may not prevent the spread of hepatitis B or C to other people. It is not known exactly how interferon alfa-2b works to treat cancer or genital warts.
Other Drugs & Yellow Toadflax
Browse every other medication we’ve checked against Yellow Toadflax — both the ones with a known interaction and the ones without. Select any drug for the full detail.
No drugs match “”.
No interaction 2,829 drugs checked — show the list
We also checked Yellow Toadflax against these medications and found no known interaction in our sources. Open any page to confirm.
- Apixaban ›
- Levothyroxine ›
- Amlodipine ›
- Methylphenidate ›
- Warfarin ›
- Sertraline ›
- Losartan Potassium ›
- Testosterone ›
- Ivermectin ›
- Aspirin ›
- Abemaciclib ›
- Acetaminophen ›
- Metoprolol ›
- Rosuvastatin ›
- Rivaroxaban ›
- Escitalopram ›
- Clopidogrel ›
- Atorvastatin ›
- Docusate ›
- Tadalafil ›
- Tirzepatide ›
- Methamphetamine ›
- Ibuprofen ›
- Valacyclovir ›
- Warfarin Sodium ›
- Hydroxyurea ›
- Sumatriptan ›
- Semaglutide ›
- Prednisone ›
- Lisdexamfetamine ›
- Propranolol ›
- Metformin ›
- Amitriptyline ›
- Amoxicillin ›
- Lisinopril ›
- Isotretinoin ›
- Amlodipine Besylate ›
- Methotrexate ›
- Bendamustine ›
- Bupropion ›
- Amphetamine ›
- Fluoxetine ›
- Doxycycline ›
- Acyclovir ›
- Azithromycin ›
- Pregabalin ›
- Lamotrigine ›
- Dextroamphetamine ›
- Gabapentin ›
- Acetaminophen, Codeine ›
- Levothyroxine, Liothyronine ›
- Clonazepam ›
- Quetiapine ›
- Naproxen ›
- Omeprazole ›
- Letrozole ›
- Duloxetine ›
- Methylene Blue ›
- Buspirone ›
- Citalopram ›
Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full Yellow Toadflax list.
Yellow Toadflax References
The 1 sources that drive our Yellow Toadflax monograph — publicly available pages from reputable medical and government organizations. Every link was verified to work before publishing. Yellow Toadflax is not covered by the licensed Natural Medicines interaction database, so its page cites these public sources directly.
- Dietary and Herbal Supplements — NIH NCCIH Source
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.
Taking Yellow Toadflax and Interferon Alfa-2b Together: Common Questions
Is it safe to take Yellow Toadflax with Interferon Alfa-2b?
Does Interferon Alfa-2b 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.