Medication interaction hub

What Supplements Interact with Fenfluramine?

Fenfluramine brand name: Pondimin. Every interaction below applies to the brands too.

77 Interactions 1 Major 56 Moderate 20 Minor
Curated & coded by · Clinical Pharmacist · Updated September 22, 2026

Drug–supplement interaction data sourced from Natural Medicines Pro, the licensed clinical database from TRC Healthcare / Therapeutic Research, with additional analysis by the HelloPharmacist Pharmacist Team. Our sources · Editorial policy

What is this page for?

One answer, for one medication: what supplements and herbal products interact with Fenfluramine? Every vitamin, herb, and supplement ingredient we’ve checked against it is on this page, ranked by severity, each linking to the full report for that exact pair.

This page covers supplement interactions only — to check Fenfluramine against your other medications, use the drug–drug interaction checker. Educational information from our licensed clinical databases, not medical advice. Our editorial policy

HelloPharmacist Bottom Line
Our Pharmacist Explains
What is this? The interaction data in the HelloPharmacist supplement database is licensed from Natural Medicines Pro by TRC Healthcare (Therapeutic Research). HelloPharmacist pharmacists often add our own analysis and context on top of that licensed data — such as this Bottom Line summary and the notes on individual interaction pages — and any such commentary is noted as ours.

Activated charcoal is the single major-rated risk here, and it earns that rating by soaking up fenfluramine (Pondimin) in the gut so that less of each dose ever reaches your blood. Fenfluramine is a serotonin-acting appetite suppressant, and a drug like that losing potency unpredictably is not a small thing, so I would treat this list of 77 ingredients with real care rather than a shrug.

Sixty of the 77, goldenseal and CBD included, can slow CYP2D6, the enzyme that clears fenfluramine, which risks pushing its blood level higher than intended. The other 17 are products that change how much of an oral dose gets absorbed at all, so space those well apart from your pill and leave exact timing to the full report. Fifty-six entries rate moderate and 20 minor, but the charcoal interaction is the one to get right first.

— , Clinical Pharmacist · July 18, 2026

Major 1 Moderate 56 Minor 20 No known interaction 1,375

This box checks one ingredient at a time (like turmeric or magnesium). Taking a supplement product with a whole label of ingredients? Search the product instead — we check every ingredient on it ↓

Top Ingredient Interactions

Fenfluramine: Top Interactions at a Glance

The most significant Fenfluramine supplement & herbal interactions, colored by severity. Tap any ingredient to open the full report for that pair.

Showing the 12 highest-ranked of 77 interacting ingredients — plus 1,375 more checked with no known interaction. See the complete ranked list.

Start here

The Major Interactions to Know About

The most clinically significant Fenfluramine + supplement combinations in our database, best-documented first. Open any card for the full report.

Major Likelihood Probable Activated Charcoal + Fenfluraminei

Activated charcoal reduces systemic exposure to many drugs, including those that undergo enterohepatic recirculation, regardless of the route of administration.

Read the full interaction
The complete list

Every Supplement Checked Against Fenfluramine

All 1,452 ingredients in our database, ranked by severity — 77 with a Fenfluramine interaction on file and 1,375 with none found. Filter by severity or search any ingredient; hover the for what each ingredient is.

Looking for an interaction with a specific supplement product? Search products instead ↓

Straight answers

Can You Take It With Fenfluramine?

One-line answers, one card per combination — scroll through today’s 20 and tap any card for the full report. A different set rotates in daily until every combination has had its turn.

Can you take Blond Psyllium with Fenfluramine?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.

Full Blond Psyllium + Fenfluramine answer

Can you take Corydalis Yanhusuo with Fenfluramine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, Corydalis yanhusuo might increase serum levels of drugs metabolized by CYP2D6.

Full Corydalis Yanhusuo + Fenfluramine answer

Can you take Goji with Fenfluramine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, goji berry might inhibit CYP2D6 and reduce metabolism of CYP2D6 substrates.

Full Goji + Fenfluramine answer

Can you take Grape with Fenfluramine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, grape seed extract may increase the levels of CYP2D6 substrates.

Full Grape + Fenfluramine answer

Can you take Greater Celandine with Fenfluramine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Research in vitro shows that chelidonine, a constituent of greater celandine, inhibits cytochrome P450 2D6 (CYP2D6) enzyme activity.

Full Greater Celandine + Fenfluramine answer

Can you take Guar Gum with Fenfluramine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.

Full Guar Gum + Fenfluramine answer

Can you take Gum Arabic with Fenfluramine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, gum arabic can alter the absorption of oral drugs due to its fiber content.

Full Gum Arabic + Fenfluramine answer

Can you take Higenamine with Fenfluramine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, higenamine might increase the levels and clinical effects of drugs metabolized by CYP2D6.

Full Higenamine + Fenfluramine answer

Can you take Indian Snakeroot with Fenfluramine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, Indian snakeroot might inhibit CYP2D6 enzymes and reduce the metabolism of CYP2D6 substrates.

Full Indian Snakeroot + Fenfluramine answer

Can you take Kratom with Fenfluramine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, kratom might increase the levels and clinical effects of drugs metabolized by CYP2D6.

Full Kratom + Fenfluramine answer

Can you take Lentinan with Fenfluramine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Laboratory research suggests that lentinan might increase the activity of cytochrome P450 2D6 (CYP2D6).

Full Lentinan + Fenfluramine answer

Can you take N,n-dmpea with Fenfluramine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. In vitro research shows that N,N-DMPEA strongly inhibits cytochrome P450 2D6 (CYP2D6).

Full N,n-dmpea + Fenfluramine answer

Can you take Oregon Grape with Fenfluramine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, Oregon grape might increase serum levels of drugs metabolized by CYP2D6.

Full Oregon Grape + Fenfluramine answer

Can you take Panax Ginseng with Fenfluramine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, Panax ginseng might increase levels of drugs metabolized by CYP2D6.

Full Panax Ginseng + Fenfluramine answer

Can you take Phellodendron with Fenfluramine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, phellodendron might increase serum levels of drugs metabolized by CYP2D6.

Full Phellodendron + Fenfluramine answer

Can you take Pomegranate with Fenfluramine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, pomegranate might increase levels of drugs metabolized by CYP2D6.

Full Pomegranate + Fenfluramine answer

Can you take Propolis with Fenfluramine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, high doses of propolis might increase blood levels of drugs metabolized by CYP2D6.

Full Propolis + Fenfluramine answer

Can you take Quercetin with Fenfluramine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, concomitant use might increase the levels and adverse effects of CYP2D6 substrates.

Full Quercetin + Fenfluramine answer

Can you take Rauvolfia Vomitoria with Fenfluramine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, Rauvolfia vomitoria might increase the levels and clinical effects of CYP2D6 substrates.

Full Rauvolfia Vomitoria + Fenfluramine answer

Can you take Rauwolscine with Fenfluramine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, rauwolscine might increase levels of drugs metabolized by CYP2D6.

Full Rauwolscine + Fenfluramine answer
Read the list like a pharmacist

What Severity, Likelihood & Evidence Mean

Severity — How Serious It Can Be

  • Major. Clinically significant; generally best avoided, or used only under direct professional supervision.
  • Moderate. May need monitoring, a dose adjustment, or separating the times you take each one.
  • Minor. Generally not clinically significant, but still worth noting and mentioning to your pharmacist.
  • No known interaction. Checked against our sources with nothing documented — not the same as proven safety.

Likelihood — How Well It’s Documented

  • Likely. Well-controlled human studies have demonstrated the likely existence of this interaction
  • Probable. Interaction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
  • Possible. Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists
  • Unlikely. Interaction has been demonstrated in animal or in lab research but has been shown not to occur in humans.

Where This Data Comes From

  • Interaction records are evidence-graded and sourced from the Natural Medicines database (TRC Healthcare), the same reference used by pharmacists and hospitals.
  • Each entry links to a full report with the clinical detail, likelihood, evidence level, and citations for that exact combination.
  • Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

How Does Our Interaction Checker Work?

Behind every verdict on this page is a category system. Our source database doesn’t document supplement interactions drug-by-drug — it documents them against groups of medications that behave the same way (for example, “drugs processed by the CYP3A4 liver enzyme” or “blood-thinning medications”).

So the check works in three steps: (1) Fenfluramine is classified into the pharmacology categories it belongs to, (2) every supplement interaction documented against any of those categories is inherited by Fenfluramine, and (3) each ingredient keeps its own severity, likelihood, and evidence grades from the underlying record. That’s why one supplement can carry several records for one drug — it may interact through more than one category.

Fenfluramine sits in 2 interaction categories. Open any one to see what the group means:

Cytochrome P450 2D6 (Cyp2D6) Substrates 60 ingredients

A drug-metabolism group: these medications are processed by the named liver enzyme (a cytochrome P450). Supplements that speed this enzyme up or slow it down can lower or raise the medication's levels in your body.

60 of the supplement ingredients on this page reach Fenfluramine through this category.

Oral Drugs 17 ingredients

A pharmacology grouping from our source database: medications in this group share a property that certain supplements are known to interact with, so an interaction documented for the group applies to every drug in it.

17 of the supplement ingredients on this page reach Fenfluramine through this category.

About Fenfluramine

Fenfluramine is an antiseizure ingredient used to treat seizures associated with Dravet syndrome and Lennox-Gastaut syndrome in patients 2 years of age and older.

Generic name: Fenfluramine  ·  Brand name: Pondimin.

See the full Fenfluramine drug information
Check a real product

Take a Supplement Product? Check the Whole Bottle Against Fenfluramine

Most supplements are combination products — and the interaction may come from an ingredient you didn’t buy it for. Search any product below (or scan its label) and we’ll check every ingredient on it against Fenfluramine.

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Pharmacist Counseling Corner

Fenfluramine & Supplements: Common Questions

What supplements interact with Fenfluramine?
More than you might expect — 77 in total, though they are far from equal: 1 are rated major, 56 moderate, and 20 minor. The ranked list on this page puts the ones that genuinely matter first, and every entry opens a full report on that exact pair. The highest-ranked right now: Activated Charcoal, Ayahuasca, Coffee Charcoal.
Which Fenfluramine supplement interactions are the most serious?
Focus on the major group: Activated Charcoal. A major rating means the combination can be clinically significant, not that harm is guaranteed — but it's exactly the kind of thing to run past your pharmacist before your next dose, not after. Jump to the ranked list.
Can I take vitamins or supplements while on Fenfluramine?
Usually yes — most people on Fenfluramine can take most supplements. The catch is the exceptions, and they aren't always the exotic ones (St. John's Wort trips up more prescriptions than almost anything sold next to it). Look up each ingredient you actually take in the list above, and treat "no known interaction" as a green-ish light, not a guarantee. Try the label scanner or the interaction checker.
Do brands like Pondimin have the same supplement interactions as Fenfluramine?
Yes — Pondimin all contain Fenfluramine, so everything on this page applies to them equally. Interactions belong to the active drug, never to the brand on the box; the same is true of generics.
Where do these interaction ratings come from?
Every rating comes from the Natural Medicines database — the same evidence-graded reference pharmacists and hospitals use — and each interaction carries three separate grades: severity (how bad it can be), likelihood (how well it's documented in studies and case reports), and an evidence level. Our pharmacists review the content; we never let an AI decide an interaction. See how to read the ratings and our editorial policy.
What about Fenfluramine and my other medications?
This page covers Fenfluramine against supplements and herbal ingredients. Checking Fenfluramine against your other prescription or OTC medications is a different tool — our drug interaction checker covers that side. Head to the drug–drug interaction checker, or read the full Fenfluramine drug information.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

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Sourcing

Where This Data Comes From — and Why You Can Trust It

🧪 Licensed clinical database

Every interaction verdict on this page comes from Natural Medicines Pro (TRC Healthcare / Therapeutic Research) — the same evidence-graded reference used by pharmacists and hospitals. We license this data directly; we do not scrape it, and no AI invents an interaction.

🧑‍⚕️ Pharmacist review

This page is curated and coded by , Clinical Pharmacist, with additional analysis by the HelloPharmacist Pharmacist Team. Editorial commentary is ours; the licensed interaction records are shown as sourced.

🔄 Kept current

Our interaction database refreshes on a weekly cycle, and this page re-checks the live database every time it’s rebuilt — what you see reflects the database as of September 22, 2026.

🔍 Full transparency

How every dataset on this site is sourced, licensed, and updated is documented publicly: our data sources · editorial policy · how we use AI.

Educational information, not medical advice. An interaction being on file does not mean it will happen to you — and absence of one is not proof of safety. Never start or stop a medication or supplement without talking to your pharmacist or doctor.