Pyrethrum + Ethinyl Estradiol, Norethindrone, Ferrous Fumarate
Ethinyl Estradiol, Norethindrone, Ferrous Fumarate brand names: Estrostep Fe, Loestrin Fe, Microgestin FE, Junel Fe 1.5/30, Loestrin Fe 1.5/30, and others.
We found no known interaction between Pyrethrum and Ethinyl Estradiol, Norethindrone, Ferrous Fumarate 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 Ethinyl Estradiol, Norethindrone, Ferrous Fumarate states a food rule worth keeping to.
Pyrethrum and Ethinyl Estradiol, Norethindrone, Ferrous Fumarate
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 Ethinyl Estradiol, Norethindrone, Ferrous Fumarate and Pyrethrum 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 Pyrethrum at all — not against Ethinyl Estradiol, Norethindrone, Ferrous Fumarate, 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.
Pyrethrum safety at a glance
Safety guidance is general; always confirm with your pharmacist or doctor for your situation.
Some Ethinyl Estradiol, Norethindrone, Ferrous Fumarate Products Have a Food Rule — Pyrethrum Should Not Break It
At least one FDA label for a product containing Ethinyl Estradiol, Norethindrone, Ferrous Fumarate says to take it with food. If you take Pyrethrum on an empty stomach out of habit, keep them separate — and take Ethinyl Estradiol, Norethindrone, Ferrous Fumarate 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 Ethinyl Estradiol, Norethindrone, Ferrous Fumarate 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.
Tablets should be taken regularly with a meal or at bedtime.
From the Dosage and Administration section of the FDA label we read for Ethinyl Estradiol, Norethindrone, Ferrous Fumarate — where that label names a specific product, the instruction is that product's.
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 Ethinyl Estradiol, Norethindrone, Ferrous Fumarate
This page covers Pyrethrum only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Ethinyl Estradiol, Norethindrone, Ferrous Fumarate page lists 240 supplements it has a documented interaction with, worst first, each one explained.
The most serious there right now: Activated Charcoal (major), Beer (major), Grapefruit (major), Siberian Cocklebur (major) and St. John's Wort (major).
By severity: 6 major · 196 moderate · 38 minor.
From our pharmacist’s overview on the Ethinyl Estradiol, Norethindrone, Ferrous Fumarate page
“If you take a birth control pill that combines ethinyl estradiol, norethindrone, and iron (Loestrin Fe, Estrostep Fe, Microgestin Fe), a few supplements can genuinely undermine it, and I want you to know which ones first. Six of the 240 ingredients on file carry a major rating.”
Reviewed by 2 · Jul 18, 2026
Open the Ethinyl Estradiol, Norethindrone, Ferrous Fumarate interaction page
Where Pyrethrum and Ethinyl Estradiol, Norethindrone, Ferrous Fumarate 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.
#1,117 of 1,452 supplements looked up here in the last 7 days
#805 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 Pyrethrum reference on this page ↓
- Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Pyrethrum and Ethinyl Estradiol, Norethindrone, Ferrous Fumarate 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 Pyrethrum
What is Pyrethrum?
- Natural insect repellent
- Killing fleas, lice, and other pests
- Garden and household insecticide
- Traditional use against parasites
Pyrethrum is a daisy-like flower whose extracts (called pyrethrins) are widely used as a natural insecticide for plants, pets, and lice. It is not a supplement meant to be taken by mouth, and there is no good evidence supporting any internal health use. If you use pyrethrum products, treat them as pesticides and follow label directions carefully.
Tanacetum cinerariifolium · Asteraceae · Dried flower heads · Insecticide powders, sprays, and extracts (pyrethrins); rarely used internally
An interaction check asks whether these two react with each other — it does not ask whether Pyrethrum is a good idea for someone in your situation. Here is what our Pyrethrum record says about it on its own.
Pyrethrum: dosing
There is no established or recommended internal dose for pyrethrum, and it should not be taken as a supplement. For insecticide, lice, or flea products, the correct amount depends entirely on the specific product.Always follow the directions on the product label exactly, and do not use more or more often than directed.
From our Pyrethrum monograph — the full record covers uses, side effects and every documented interaction.
Other Drugs & Pyrethrum
Browse every other medication we’ve checked against Pyrethrum — 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 Pyrethrum 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 2,829 medications checked with no known interaction — see the full Pyrethrum list.
Pyrethrum References
The 3 references that drive our Pyrethrum 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.
- Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
- Covington TR, et al. Handbook of Nonprescription Drugs. 11th ed. Washington, DC: American Pharmaceutical Association, 1996.
- Drugs in Pregnancy and Lactation. 4th ed. Baltimore, MD: Williams & Wilkins, 1994.
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.
Ethinyl Estradiol, Norethindrone, Ferrous Fumarate Is Linked to Lower Levels of 7 Nutrients
Natural Medicines records Ethinyl Estradiol, Norethindrone, Ferrous Fumarate as a medicine that can lower these. This is not an interaction with Pyrethrum — 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 Ethinyl Estradiol, Norethindrone, Ferrous Fumarate 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 Pyrethrum and Ethinyl Estradiol, Norethindrone, Ferrous Fumarate Together: Common Questions
Is it safe to take Pyrethrum with Ethinyl Estradiol, Norethindrone, Ferrous Fumarate?
Should I take Pyrethrum and Ethinyl Estradiol, Norethindrone, Ferrous Fumarate at the same time of day?
Does Ethinyl Estradiol, Norethindrone, Ferrous Fumarate 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.