Drug & supplement interaction

Quinoa + Phendimetrazine

Phendimetrazine brand names: Plegine, Metra, Weightrol.

No Known Interaction
Medically reviewed by · Updated July 2026 · Pair last verified Sep 13, 2026
The bottom line No known interaction

We found no known interaction between Quinoa and Phendimetrazine 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.

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Interaction report

Quinoa and Phendimetrazine

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 Phendimetrazine and Quinoa 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 Quinoa at all — not against Phendimetrazine, 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.

Quinoa safety at a glance

Quinoa overall Generally safe Quinoa is widely eaten as a food and is generally safe for most people.
Pregnancy Likely Safe When used orally in food amounts. There is insufficient reliable information available about the safety of quinoa in medicinal amounts; avoid using. Read the full pregnancy detail
Breastfeeding Likely Safe When used orally in food amounts. There is insufficient reliable information available about the safety of quinoa in medicinal amounts; avoid using. Read the full breastfeeding detail

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.

Still wondering about combining Phendimetrazine and Quinoa? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

What Quinoa Itself Has Been Linked To

This is not an interaction — nothing below involves Phendimetrazine. It is the side-effect record for Quinoa on its own, from the licensed Natural Medicines monograph. If something new turns up after you add Quinoa, this list is the first place to look. One entry is worth acting on rather than waiting out — marked below.

  • A severe allergic reaction / An allergic reaction Worth acting on Additional detail

    “Orally, allergic reactions to quinoa have been reported. Anaphylaxis and pruritic reactions have occurred in at least two individuals, a 29-year-old female and a 52-year-old male. Quinoa allergy was confirmed in both patients via skin-prick testing with quinoa extract.”

    Quinoa · Natural Medicines adverse-effect record, reported in allergic rhinitis (hay fever).

    3 sources cited
    1. 99150. Hong J, Convers K, Reeves N, Temprano J. Anaphylaxis to quinoa. Ann Allergy Asthma Immunol. 2013;110(1):60-1. PubMed
    2. 96062. El-Qutob López D, Bartolomé Zavala B, Ortiz I. Cross-reactivity between buckwheat and quinoa in a patient with eosinophilic esophagitis caused by wheat. J Investig Allergol Clin Immunol. 2014;24(1):56-7.
    3. 99151. Astier C, Moneret-Vautrin DA, Puillandre E, Bihain BE. First case report of anaphylaxis to quinoa, a novel food in France. Allergy. 2009;64(5):819-20. PubMed

Everything above comes from the Natural Medicines adverse-effect record for Quinoa — expand a row for the licensed statement it rests on. We read the ADVERSE REACTIONS section of Phendimetrazine’s FDA label too, and the two lists don’t meaningfully overlap — which is why no Phendimetrazine column appears here.

Special populations

Quinoa in Pregnancy & Breastfeeding

Pregnancy And Lactation Likely Safe

When used orally in food amounts. There is insufficient reliable information available about the safety of quinoa in medicinal amounts; avoid using.

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

Overlapping uses

What Phendimetrazine Is Prescribed For, and What Quinoa Has Been Studied For

These two come up together because they touch the same health topic — not because they do the same job. Phendimetrazine is a prescription medicine with approved uses on its FDA label. Quinoa is a supplement: what follows is what researchers have looked at it for, and how strong that evidence is.

Phendimetrazine is prescribed for: Phendimetrazine tartrate is used to help manage exogenous obesity (excess body weight from outside causes like diet and lifestyle) as a short-term addition to a calorie-restricted diet. It is intended for adults with a BMI of 30 or higher, or a BMI of 27 or higher when other risk factors — such as high blood pressure, diabetes, or high cholesterol — are also present. It is approved for use as monotherapy only, meaning it must not be combined with other weight-loss drugs or stimulants. Both the tablet form and the extended-release capsule form are approved for this purpose.

Read the rest of what Phendimetrazine is prescribed for

This medication is meant to be used for only a few weeks as part of a broader weight-management plan.

Quinoa has been studied for:

  • Obesity studied, not established Quinoa has been studied for this. Natural Medicines rates the evidence: Insufficient Reliable Evidence To Rate Read what the research shows

    Quinoa for obesity

    Preliminary clinical research in healthy overweight males shows that consuming a bread providing quinoa flour 20 grams daily for 4 weeks does not affect anthropometric measures, blood pressure, or plasma levels of glucose or cholesterol when compared with consuming a refined wheat bread.

    1 source cited
    1. 99147. Li L, Lietz G, Bal W, Watson A, Morfey B, Seal C. Effects of quinoa (Chenopodium quinoa Willd.) consumption on markers of CVD risk. Nutrients. 2018;10(6). pii: E777. PubMed

Effectiveness ratings and the research summaries above are the verbatim record from the Natural Medicines database, which grades evidence from “Effective” down to “Insufficient Reliable Evidence To Rate”. A rating below the top of that scale means researchers have looked at it — not that it works, and never that it can stand in for a prescribed medicine. Do not stop or replace Phendimetrazine on your own; if you are taking Quinoa for the same health topic, tell your prescriber, especially if the medicine is being adjusted to a target.

Everything else you take

See Every Supplement That Interacts With Phendimetrazine

This page covers Quinoa only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Phendimetrazine page lists 17 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Coffee Charcoal (moderate), European Mandrake (moderate), Glucomannan (moderate) and Guar Gum (moderate).

By severity: 1 major · 7 moderate · 9 minor.

From our pharmacist’s overview on the Phendimetrazine page

“Of the 17 supplements on file for phendimetrazine, an appetite-suppressant stimulant prescribed short term for weight loss, activated charcoal is the one that demands real caution. Charcoal binds medications in the gut and can sharply cut how much of a drug your body absorbs, leaving you with less appetite control than your prescriptio…”

Reviewed by 2 · Jul 18, 2026

Open the Phendimetrazine interaction page

One more smart check

Taking Quinoa as Part of a Dietary Supplement Product? Check It for Interactions

We hold 699 real supplement products containing Quinoa, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Quinoa. Even though Quinoa itself has no known interaction with Phendimetrazine, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:

How much people look this up

Where Quinoa and Phendimetrazine 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.

Supplement Quinoa
Top 25%

#287 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Phendimetrazine
Top 25%

#387 of 2,830 medications looked up here in the last 7 days

29 days ago today

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 Quinoa reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Quinoa and Phendimetrazine 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.
Data structure & sourcing designed and verified by .
Supplement

About Quinoa

What is Quinoa?

  • Gluten-free grain alternative
  • Plant-based protein source
  • Heart and cholesterol health
  • Blood sugar support
  • Digestive and fiber intake
  • Weight management

Quinoa is a nutritious, gluten-free seed eaten like a grain, rich in protein, fiber, and minerals. It is best thought of as a healthy food rather than a medicine, and most people can enjoy it safely as part of a balanced diet.

Chenopodium quinoa · Amaranthaceae · Seeds (whole grain); leaves are sometimes eaten as a vegetable · Whole cooked seeds, flour, flakes, puffed cereal, and protein powders

An interaction check asks whether these two react with each other — it does not ask whether Quinoa is a good idea for someone in your situation. Here is what our Quinoa record says about it on its own.

Quinoa: dosing

There is no official medicinal dose for quinoa because it is a food, not a standardized supplement. Most people simply eat it as a serving of cooked grain, similar to rice or pasta.If you use a quinoa-based product such as flour, flakes, or a protein powder, follow the directions on the package.

From our Quinoa monograph — the full record covers uses, side effects and every documented interaction.

Read the full Quinoa monograph & all interactions
Medication

About Phendimetrazine

What Is Phendimetrazine Used For?

Brand names: Plegine, Metra, Weightrol

Phendimetrazine tartrate is used to help manage exogenous obesity (excess body weight from outside causes like diet and lifestyle) as a short-term addition to a calorie-restricted diet. It is intended for adults with a BMI of 30 or higher, or a BMI of 27 or higher when other risk factors — such as high blood pressure, diabetes, or high cholesterol — are also present.

It is approved for use as monotherapy only, meaning it must not be combined with other weight-loss drugs or stimulants. Both the tablet form and the extended-release capsule form are approved for this purpose. This medication is meant to be used for only a few weeks as part of a broader weight-management plan.

See full Phendimetrazine drug information
Keep checking

Other Drugs & Quinoa

Browse every other medication we’ve checked against Quinoa — both the ones with a known interaction and the ones without. Select any drug for the full detail.

0Major
0Moderate
0Minor
2,829No known interaction
2,829 No interaction
No interaction 2,829 drugs checked — show the list

We also checked Quinoa against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full Quinoa list.

See the full Quinoa interactions page
See every supplement checked against Phendimetrazine, ranked by severity
Evidence & sources

Quinoa References

The 5 references that drive our Quinoa 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.

  1. El-Qutob López D, Bartolomé Zavala B, Ortiz I. Cross-reactivity between buckwheat and quinoa in a patient with eosinophilic esophagitis caused by wheat. J Investig Allergol Clin Immunol. 2014;24(1):56-7.
  2. Li L, Lietz G, Bal W, Watson A, Morfey B, Seal C. Effects of quinoa (Chenopodium quinoa Willd.) consumption on markers of CVD risk. Nutrients. 2018;10(6). pii: E777. PubMed
  3. De Carvalho FG, Ovídio PP, Padovan GJ, Jordão Junior AA, Marchini JS, Navarro AM. Metabolic parameters of postmenopausal women after quinoa or corn flakes intake--a prospective and double-blind study. Int J Food Sci Nutr. 2014;65(3):380-5. PubMed
  4. Hong J, Convers K, Reeves N, Temprano J. Anaphylaxis to quinoa. Ann Allergy Asthma Immunol. 2013;110(1):60-1. PubMed
  5. Astier C, Moneret-Vautrin DA, Puillandre E, Bihain BE. First case report of anaphylaxis to quinoa, a novel food in France. Allergy. 2009;64(5):819-20. PubMed

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.

Pharmacist Counseling Corner

Taking Quinoa and Phendimetrazine Together: Common Questions

Is it safe to take Quinoa with Phendimetrazine?
We do not list a known interaction between Quinoa and Phendimetrazine. That does not guarantee the combination is risk-free, so confirm with your pharmacist or doctor — especially if you take other medications or have a health condition.
Are Quinoa and Phendimetrazine used for the same thing?
They overlap in purpose, which usually means the real question is whether you need both rather than whether they are safe together. This page lists the shared uses and how strong the evidence is for Quinoa in each. That is a conversation for your prescriber, especially if Phendimetrazine is being adjusted to a target.
Does Phendimetrazine interact with any supplements?
Yes. Phendimetrazine has documented interactions with 17 supplements in our database — Quinoa is not one of them. The Phendimetrazine interaction page linked on this page lists every one, ranked by severity.

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

Where next

Keep Exploring

Quinoa monograph Uses, safety profile, and every drug interaction in one place Phendimetrazine drug information The full plain-English guide to this medication Phendimetrazine supplement interactions Every supplement checked against Phendimetrazine, ranked by severity Supplement interaction checker Check any supplement or product against your medications Browse medications A–Z Every drug we’ve checked against herbs & supplements References The 5 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Phendimetrazine and Quinoa?

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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.