Spleen Extract + Norgestrel
Norgestrel brand names: Ovrette, Orval 21.
We found no known interaction between Spleen Extract and Norgestrel 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.
Spleen Extract and Norgestrel
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 Norgestrel and Spleen Extract 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 Spleen Extract at all — not against Norgestrel, 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.
Spleen Extract safety at a glance
Safety guidance is general; always confirm with your pharmacist or doctor for your situation.
See Every Supplement That Interacts With Norgestrel
This page covers Spleen Extract only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Norgestrel page lists 188 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 · 140 moderate · 42 minor.
From our pharmacist’s overview on the Norgestrel page
“Norgestrel (Ovrette) is a progestin-only birth control pill, so the biggest danger on this page is not a strange side effect but a pill that quietly stops working. That risk makes this a page for genuine vigilance.”
Reviewed by 2 · Jul 18, 2026
Taking Spleen Extract as Part of a Dietary Supplement Product? Check It for Interactions
We hold 2 real supplement products containing Spleen Extract, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Spleen Extract. Even though Spleen Extract itself has no known interaction with Norgestrel, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:
Where Spleen Extract and Norgestrel 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.
#1,228 of 1,452 supplements looked up here in the last 7 days
#1,670 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 Spleen Extract reference on this page ↓
- Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Spleen Extract and Norgestrel 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 Spleen Extract
What is Spleen Extract?
- Immune support
- Low white blood cell counts
- General "glandular" support
- Boosting energy or vitality
Spleen extract is a glandular supplement made from the spleen tissue of animals such as cows or pigs, promoted mainly for immune support. There is very little reliable human research to show it works, and because it is an animal tissue product there are real safety questions, including possible infection risk. Talk with your pharmacist or doctor before using it.
Spleen tissue, usually from cattle (bovine) or pigs (porcine) · Capsules, tablets, sometimes injectable forms (older or non-standard products)
An interaction check asks whether these two react with each other — it does not ask whether Spleen Extract is a good idea for someone in your situation. Here is what our Spleen Extract record says about it on its own.
Spleen Extract: dosing
There is no established or standardized dose for spleen extract. Products vary widely in how they are made and what they contain.If you choose to use it, follow the directions on the product label and do not exceed the recommended amount.
From our Spleen Extract monograph — the full record covers uses, side effects and every documented interaction.
About Progestin-Only (norethindrone) Oral Contraceptives
What Is Progestin-Only (norethindrone) Oral Contraceptives Used For?
Brand names: Ovrette, Orval 21
Norethindrone progestin-only pills — sometimes called the "mini-pill" — are used solely to prevent pregnancy. They do not contain estrogen, which makes them an option for women who cannot or prefer not to use estrogen-containing contraceptives.
When taken perfectly (same time every day, no missed pills), fewer than 1 in 100 women will become pregnant in the first year. With typical use, that number rises to about 9 in 100 — mostly because of late or skipped pills. Consistency is everything with this method.
Most-Reported Side Effects for Norgestrel
From FAERS, the FDA’s public side-effect reporting system (2,254 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.
Other Drugs & Spleen Extract
Browse every other medication we’ve checked against Spleen Extract — 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 Spleen Extract 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 ›
- Ivermectin ›
- Abemaciclib ›
- Aspirin ›
- Acetaminophen ›
- Metoprolol ›
- Rosuvastatin ›
- Rivaroxaban ›
- Escitalopram ›
- Clopidogrel ›
- Atorvastatin ›
- Tadalafil ›
- Docusate ›
- Tirzepatide ›
- Ibuprofen ›
- Methamphetamine ›
- Hydroxyurea ›
- Warfarin Sodium ›
- Valacyclovir ›
- Sumatriptan ›
- Semaglutide ›
- Prednisone ›
- Lisdexamfetamine ›
- Propranolol ›
- Metformin ›
- Amitriptyline ›
- Amoxicillin ›
- Lisinopril ›
- Isotretinoin ›
- Amlodipine Besylate ›
- Methotrexate ›
- Bendamustine ›
- Bupropion ›
- Amphetamine ›
- Doxycycline ›
- Fluoxetine ›
- Acyclovir ›
- Azithromycin ›
- Lamotrigine ›
- Pregabalin ›
- Dextroamphetamine ›
- Gabapentin ›
- Acetaminophen, Codeine ›
- Clonazepam ›
- Quetiapine ›
- Levothyroxine, Liothyronine ›
- Naproxen ›
- Omeprazole ›
- Letrozole ›
- Methylene Blue ›
- Duloxetine ›
- Buspirone ›
- Citalopram ›
Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full Spleen Extract list.
Spleen Extract References
The 1 references that drive our Spleen Extract 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.
- Lewis CJ. Letter to reiterate certain public health and safety concerns to firms manufacturing or importing dietary supplements that contain specific bovine tissues. FDA. Available at: www.cfsan.fda.gov/~dms/dspltr05.html.
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.
Norgestrel Is Linked to Lower Levels of 2 Nutrients
Natural Medicines records Norgestrel as a medicine that can lower these. This is not an interaction with Spleen Extract — 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 Norgestrel 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 Spleen Extract and Norgestrel Together: Common Questions
Is it safe to take Spleen Extract with Norgestrel?
Does Norgestrel 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.