Drug & supplement interaction

Goji + Phentermine

Phentermine brand names: Adipex-P, Fastin, T Diet, Phentride, Obenix, and others.

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 Goji and Phentermine 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

Goji and Phentermine

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 Phentermine and Goji 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.

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.

Goji safety at a glance

Goji overall Use caution Generally safe as a food, but concentrated supplements have less safety data.
Pregnancy Avoid Avoid medicinal amounts during pregnancy due to limited safety data and traditional reports of uterine effects.
Breastfeeding Use caution Not enough reliable data on supplement use while breastfeeding, so caution is advised.

Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Phentermine and Goji? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Phentermine

Interactions in our licensed database are recorded against drug classes, not just single drug names. Phentermine is filed under 2 classifications — stimulant drugs, oral drugs. Goji has documented interactions with 8 drug classes — the most serious being warfarin (coumadin) (major), antihypertensive drugs (moderate) and cytochrome p450 2c19 (cyp2c19) substrates (moderate) — and none of Phentermine’s classifications are among them.

Classification data comes from our licensed Natural Medicines dataset. A medication can belong to classes beyond those recorded there, so this describes how the check was run — it is not a safety guarantee.

Keep it in perspective

Goji Does Interact With Other Medications

Goji has 2 major, 930 moderate, 68 minor known drug interactions in our database — Phentermine isn’t one of them. If you take anything else, check it against the full list below.

Major 2 Moderate 930 Minor 68 No known interaction 1,830 (incl. Phentermine)
Taking anything else?

Check Another of Your Medications Against Goji

Covers the 2,830 medications we’ve checked against Goji. Pick one to open its full report.

What to actually watch for

What Goji Itself Has Been Linked To

This is not an interaction — nothing below involves Phentermine. It is the side-effect record for Goji on its own, from the licensed Natural Medicines monograph. If something new turns up after you add Goji, this list is the first place to look. 2 entries are worth acting on rather than waiting out — marked below.

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

    “Several cases of allergic reactions secondary to consumption of goji berries have been reported. Symptoms included facial angioedema with dyspnea, pharyngeal itching, itching in the mouth, ears, and axilla, labial angioedema, and perioral skin rash. Anaphylaxis has also been reported.”

    Goji · Natural Medicines adverse-effect record, reported in pruritus.

    2 sources cited
    1. 92116. Larramendi CH, García-Abujeta JL, Vicario S, García-Endrino A, López-Matas MA, García-Sedeño MD, et al. Goji berries (Lycium barbarum): Risk of allergic reactions in individuals with food allergy. J Investig Allergol Clin Immunol. 2012;22(5):345-50.
    2. 52538. Monzon, Ballarin S., Lopez-Matas, M. A., Saenz, Abad D., Perez-Cinto, N., and Carnes, J. Anaphylaxis associated with the ingestion of Goji berries (Lycium barbarum). J.Investig.Allergol.Clin.Immunol. 2011;21(7):567-570.
  • Liver problems Worth acting on Additional detail

    “Orally, consumption of goji berries has been associated with a single case report of autoimmune hepatitis. A case of acute hepatitis has also been reported in a female who consumed 2 ounces of a specific combination product (Euforia, Nuverus International) containing goji berry, pomegranate, curcumin, green tea, noni, acai berry, aloe vera, blueberry, resveratrol, mangosteen, and black seed, daily for one month.”

    Goji · Natural Medicines adverse-effect record, reported in hepatitis.

    2 sources cited
    1. 52541. Franco, M., Monmany, J., Domingo, P., and Turbau, M. [Autoimmune hepatitis triggered by consumption of Goji berries]. Med.Clin.(Barc.) 9-22-2012;139(7):320-321.
    2. 90125. Jiménez-Encarnación E, Ríos G, Muñoz-Mirabal A, Vilá LM. Euforia-induced acute hepatitis in a patient with scleroderma. BMJ Case Rep 2012;2012. PubMed
  • Itching / A skin rash Additional detail

    Recorded for Goji in the same Natural Medicines adverse-effect record shown under Shortness of breath / A severe allergic reaction / An allergic reaction above.

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

Overlapping uses

What Phentermine Is Prescribed For, and What Goji Has Been Studied For

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

Phentermine is prescribed for: Phentermine is approved as a short-term addition to a weight-loss program — not a standalone treatment. It is used alongside reduced-calorie eating, increased physical activity, and behavior changes to help manage obesity in adults whose body mass index (BMI) is 30 kg/m² or higher, or 27 kg/m² or higher when other risk factors such as controlled high blood pressure, diabetes, or high cholesterol (hyperlipidemia) are also present. All available phentermine products — including Adipex-P, Lomaira, and various generic capsules and tablets — share this same FDA-approved use. Lomaira tablets are specifically dosed to be taken three times daily before meals, while other formulations are generally taken once daily.

Read the rest of what Phentermine is prescribed for

Treatment is intended to last only a few weeks.

Goji has been studied for:

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

    Goji for obesity

    It is unclear if oral goji berry juice improves weight loss.

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

    Goji for diabetes

    It is unclear if oral goji berry polysaccharides improve glycemic control in patients with diabetes.

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 Phentermine on your own; if you are taking Goji for the same health topic, tell your prescriber, especially if the medicine is being adjusted to a target.

From our Q&A

Questions About Goji or Phentermine

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Goji or Phentermine, not necessarily both, but if one is close to what you were about to ask it will usually go further than a database entry can:

Not quite your question? Ask our pharmacists directly — it is free, there is no account required, and answers usually come back within 24 hours.

Everything else you take

See Every Supplement That Interacts With Phentermine

This page covers Goji only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Phentermine page lists 61 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Ephedra (major), Peyote (major), Rauvolfia Vomitoria (major) and Sida Cordifolia (major).

By severity: 5 major · 43 moderate · 13 minor.

From our pharmacist’s overview on the Phentermine page

“Ephedra is the pairing I most want anyone taking phentermine (Adipex-P) to know about. Phentermine is itself a stimulant appetite suppressant that raises heart rate and blood pressure, and ephedra piles the same cardiovascular strain on top of it.”

Reviewed by 2 · Jul 18, 2026

Open the Phentermine interaction page

One more smart check

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

We hold 1,738 real supplement products containing Goji, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Goji. Even though Goji itself has no known interaction with Phentermine, 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 Goji and Phentermine 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 Goji
Top 10%

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

29 days ago today
Medication Phentermine
Top 25%

#324 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 Goji reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Goji and Phentermine 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 Goji

What is Goji?

Goji
  • General antioxidant support
  • Eye health
  • Immune support
  • Anti-aging and well-being
  • Blood sugar support

Goji berries are a nutritious fruit rich in antioxidants, vitamins, and plant polysaccharides, and they are safe for most people as a food. While they are popular for eye health, immune support, and general wellness, strong human evidence for most health claims is limited. Talk with your pharmacist or doctor before using concentrated goji supplements, especially if you take medications or are pregnant.

Lycium barbarum · Solanaceae · Fruit (berries); root bark and leaves are also used in traditional medicine · Dried berries, juice, capsules, powders, teas, extracts

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

Goji: dosing

There is no official or proven standard dose for goji. Amounts used in studies and products vary widely depending on whether you use dried berries, juice, or an extract.The safest approach is to follow the directions on the product label and not exceed the recommended amount. They can help you choose a reputable product and make sure it fits with your other medicines and health conditions.

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

Read the full Goji monograph & all interactions
Medication

About Phentermine

What Is Phentermine Used For?

Brand names: Adipex-P, Fastin, T Diet, Phentride, Obenix, Pbc Phentride, Pbw Phentride, Phentrol #3, Ionamin, Phentrol #6, Phentrol #2, Phentrol #5, Phentrol, Obermine, Phentermine, Suprenza

Phentermine is approved as a short-term addition to a weight-loss program — not a standalone treatment. It is used alongside reduced-calorie eating, increased physical activity, and behavior changes to help manage obesity in adults whose body mass index (BMI) is 30 kg/m² or higher, or 27 kg/m² or higher when other risk factors such as controlled high blood pressure, diabetes, or high cholesterol (hyperlipidemia) are also present.

All available phentermine products — including Adipex-P, Lomaira, and various generic capsules and tablets — share this same FDA-approved use. Lomaira tablets are specifically dosed to be taken three times daily before meals, while other formulations are generally taken once daily. Treatment is intended to last only a few weeks.

See full Phentermine drug information
Keep checking

Other Drugs & Goji

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

2Major
930Moderate
68Minor
1,829No known interaction
2 Major 930 Moderate 68 Minor 1,829 No interaction
Major

2 interactions

Moderate

930 interactions

Showing 60 of 930 moderate interactions — see all 930 on the Goji page.

Minor

68 interactions

Showing 60 of 68 minor interactions — see all 68 on the Goji page.

No interaction 1,829 drugs checked — show the list

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

Showing the 60 most looked-up of 1,829 medications checked with no known interaction — see the full Goji list.

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

Goji References

The 14 references that drive our Goji 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. Huang KC. The Pharmacology of Chinese Herbs. 2nd ed. Boca Raton, FL: CRC Press, LLC 1999.
  2. Lam AY, Elmer GW, Mohutsky MA. Possible interaction between warfarin and Lycium Barbarum. Ann Pharmacother 2001;35:1199-201.
  3. Leung H, Hung A, Hui AC, Chan TY. Warfarin overdose due to the possible effects of Lycium barbarum L. Food Chem Toxicol 2008;46:1860-2. PubMed
  4. Amagase H, Nance DM. A randomized, double-blind, placebo-controlled, clinical study of the general effects of a standardized Lycium barbarum (goji) juice, GoChi. J Altern Complement Med 2008;14:403-12.
  5. Rivera, C. A., Ferro, C. L., Bursua, A. J., and Gerber, B. S. Probable interaction between Lycium barbarum (goji) and warfarin. Pharmacotherapy 2012;32(3):e50-e53.
  6. Monzon, Ballarin S., Lopez-Matas, M. A., Saenz, Abad D., Perez-Cinto, N., and Carnes, J. Anaphylaxis associated with the ingestion of Goji berries (Lycium barbarum). J.Investig.Allergol.Clin.Immunol. 2011;21(7):567-570.
  7. Franco, M., Monmany, J., Domingo, P., and Turbau, M. [Autoimmune hepatitis triggered by consumption of Goji berries]. Med.Clin.(Barc.) 9-22-2012;139(7):320-321.
  8. Jiménez-Encarnación E, Ríos G, Muñoz-Mirabal A, Vilá LM. Euforia-induced acute hepatitis in a patient with scleroderma. BMJ Case Rep 2012;2012. PubMed
  9. Larramendi CH, García-Abujeta JL, Vicario S, García-Endrino A, López-Matas MA, García-Sedeño MD, et al. Goji berries (Lycium barbarum): Risk of allergic reactions in individuals with food allergy. J Investig Allergol Clin Immunol. 2012;22(5):345-50.
  10. Cai H, Liu F, Zuo P, Huang G, Song Z, Wang T, et al. Practical application of antidiabetic efficacy of Lycium barbarum polysaccharide in patients with type 2 diabetes. Med Chem. 2015;11(4):383-90.
  11. Potterat O. Goji (Lycium barbarum and L. chinense): Phytochemistry, pharmacology and safety in the perspective of traditional uses and recent popularity. Planta Med 2010;76(1):7-19.
  12. Guzmán CE, Guzmán-Moreno CG, Assad-Morell JL, Edgar Francisco Carrizales-Sepúlveda EF. Flecainide toxicity associated with the use of goji berries: a case report. Eur Heart J Case Rep. 2021;5(6):ytab204. PubMed
  13. Liu R, Tam TW, Mao J, et al. In vitro activity of Lycium barbarum (Goji) against major human phase I metabolism enzymes. Complement Integr Med. 2016;13(3):257-265.
  14. Zhang J, Tian L, Xie B. Bleeding due to a probable interaction between warfarin and Gouqizi (Lycium Barbarum L.). Toxicol Rep. 2015;2:1209-1212. 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 Goji and Phentermine Together: Common Questions

Is it safe to take Goji with Phentermine?
We do not list a known interaction between Goji and Phentermine. 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 Goji and Phentermine 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 Goji in each. That is a conversation for your prescriber, especially if Phentermine is being adjusted to a target.
How was the Goji and Phentermine combination checked?
Interactions in our licensed database are recorded against drug classes. Phentermine is filed under 2 classifications, and Goji has documented interactions with 8 drug classes — none of Phentermine's classifications are among them. A medication can belong to classes beyond those recorded in our dataset, so this describes how the check was run rather than guaranteeing safety.
Does Goji interact with any other medications?
Yes. Goji has 1,000 documented drug interactions in our database — Phentermine is simply not one of them. If you take anything else, it is worth checking each one; they are all listed on this page.
Does Phentermine interact with any supplements?
Yes. Phentermine has documented interactions with 61 supplements in our database — Goji is not one of them. The Phentermine 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

Goji monograph Uses, safety profile, and every drug interaction in one place Phentermine drug information The full plain-English guide to this medication Phentermine supplement interactions Every supplement checked against Phentermine, 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 14 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Phentermine and Goji?

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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.