Mountain Flax + Ponesimod
Ponesimod brand name: Ponvory.
We found no known interaction between Mountain Flax and Ponesimod 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.
Mountain Flax and Ponesimod
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 Ponesimod and Mountain Flax 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 Mountain Flax at all — not against Ponesimod, 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.
Mountain Flax 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.
Mountain Flax in Pregnancy & Breastfeeding
When used orally due to possible emetic effects.
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
See Every Supplement That Interacts With Ponesimod
This page covers Mountain Flax only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Ponesimod page lists 146 supplements it has a documented interaction with, worst first, each one explained.
The most serious there right now: Activated Charcoal (major), American Hellebore (major), Arsenic (major), Cesium (major) and Ephedra (major).
By severity: 8 major · 98 moderate · 40 minor.
From our pharmacist’s overview on the Ponesimod page
“Someone managing relapsing MS with ponesimod (Ponvory) has real reason to read this list closely, since 8 of its 146 documented supplement interactions rate major. The largest group, 121 ingredients, works through CYP3A4, the liver enzyme that clears ponesimod.”
Reviewed by 2 · Jul 18, 2026
Where Mountain Flax and Ponesimod 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.
#1,084 of 1,452 supplements looked up here in the last 7 days
#1,088 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 Mountain Flax reference on this page ↓
- Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Mountain Flax and Ponesimod 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 Mountain Flax
What is Mountain Flax?
- Constipation
- Laxative/purgative
- Liver and digestive complaints
- Joint and rheumatic discomfort
- Traditional 'cleansing' remedies
Mountain Flax (Linum catharticum) is a small wild flax once used in traditional European herbalism mainly as a strong laxative or purgative. There is very little modern scientific evidence to support its use, and it can be harsh on the gut, so it is rarely recommended today. If you are considering any herbal laxative, talk to your pharmacist or doctor first.
Linum catharticum · Linaceae · Whole flowering plant (dried aerial parts) · Dried herb, tea/infusion, tincture (rare today)
An interaction check asks whether these two react with each other — it does not ask whether Mountain Flax is a good idea for someone in your situation. Here is what our Mountain Flax record says about it on its own.
Mountain Flax: dosing
There is no established or standardized dose for Mountain Flax, and it is not a common modern product. Older herbal traditions used small amounts of the dried plant as a tea, but exact safe amounts have not been studied.Because of this uncertainty and its strong purgative effect, we cannot recommend a specific dose.
From our Mountain Flax monograph — the full record covers uses, side effects and every documented interaction.
About Ponesimod
What Is Ponesimod Used For?
Brand name: Ponvory
Ponvory (ponesimod) is approved for adults with relapsing forms of multiple sclerosis (MS). This includes clinically isolated syndrome (a first MS episode), relapsing-remitting MS, and active secondary progressive MS.
It is not approved for children, and it is only available as an oral tablet under the brand name Ponvory.
Most-Reported Side Effects for Ponesimod
From FAERS, the FDA’s public side-effect reporting system (428 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.
Other Drugs & Mountain Flax
Browse every other medication we’ve checked against Mountain Flax — 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 Mountain Flax 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 ›
- Metoprolol ›
- Acetaminophen ›
- 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 ›
- Fluoxetine ›
- Doxycycline ›
- Acyclovir ›
- Azithromycin ›
- Lamotrigine ›
- Pregabalin ›
- Dextroamphetamine ›
- Gabapentin ›
- Acetaminophen, Codeine ›
- Quetiapine ›
- Clonazepam ›
- 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 Mountain Flax list.
Mountain Flax References
The 1 references that drive our Mountain Flax 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.
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 Mountain Flax and Ponesimod Together: Common Questions
Is it safe to take Mountain Flax with Ponesimod?
Does Ponesimod interact with any supplements?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
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Still Have a Question About Ponesimod and Mountain Flax?
Our pharmacists answer your medication & supplement questions — free.
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.