Drug & supplement interaction

Capers + Rosiglitazone Maleate

Rosiglitazone Maleate brand name: Avandia.

Moderate Interaction
Medically reviewed by · Updated September 2026
The bottom line Moderate

Capers has a moderate interaction with Rosiglitazone Maleate. Some preliminary clinical research shows that taking caper fruit extract 1200 mg daily for 2 months can lower fasting blood glucose and glycated hemoglobin (HbA1c) in patients with type 2 diabetes who are already taking antidiabetes drugs.

Read the full interaction report
SeverityModerate
LikelihoodPossible
EvidenceB
What do Severity, Likelihood & Evidence mean?
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Interaction report

Capers and Rosiglitazone Maleate

Here is the interaction we found between these two, with the evidence behind it.

Moderate

ANTIDIABETES DRUGS

Why this applies to Rosiglitazone Maleate

Rosiglitazone Maleate falls under ANTIDIABETES DRUGS — the group Capers interacts with.

Some preliminary clinical research shows that taking caper fruit extract 1200 mg daily for 2 months can lower fasting blood glucose and glycated hemoglobin (HbA1c) in patients with type 2 diabetes who are already taking antidiabetes drugs. However, other research does not support this effect. Until more is known, monitor blood glucose levels closely. Medication dose adjustments may be necessary.
Some antidiabetes drugs include glimepiride (Amaryl), glyburide (DiaBeta, Glynase PresTab, Micronase), insulin, pioglitazone (Actos), rosiglitazone (Avandia), and others.
Severity Moderate Likelihood Possible Evidence B

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.

Dr. Brian Staiger, PharmD, BCPS
Dr. Brian Staiger explains PharmD, Clinical Pharmacist

Here's the gist: rosiglitazone (Avandia) lowers your blood sugar by making your body more sensitive to insulin. Some early research suggests that concentrated caper fruit extract (around 1200 mg daily) may also nudge blood sugar and HbA1c down a bit. So if you pair the two, their effects can stack, and your blood sugar could drift lower than expected.

That means you'd want to watch for signs of low blood sugar, like shakiness, sweating, dizziness, or feeling hungry and irritable. To be fair, the evidence here is fairly weak and not all studies agree, and the amount of capers you sprinkle on a salad or pizza is very unlikely to cause this. Concentrated extracts are the real question. Don't change your Avandia dose on your own, just check in with your pharmacist or doctor and keep an eye on your numbers.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Huseini HF, Hasani-Rnjbar S, Nayebi N, et al. Capparis spinosa L. (Caper) fruit extract in treatment of type 2 diabetic patients: a randomized double-blind placebo-controlled clinical trial. Complement Ther Med. 2013;21(5):447-52. PubMed
  2. Vahid H, Bonakdaran S, Khorasani ZM, et al. Effect of Capparis spinosa extract on metabolic parameters in patients with type-2 diabetes: A randomized controlled trial. Endocr Metab Immune Disord Drug Targets. 2019;19(1):100-107. PubMed

What These Ratings Mean

Every interaction above is graded three ways — here’s the key to each label.

Severity how clinically significant the interaction is
Major

Clinically significant. Avoid the combination, or use only under close professional supervision.

Moderate

Usually worth avoiding or managing — may need monitoring, a dose change, or timing apart.

Minor

Generally not serious. Be aware of it and mention it to your pharmacist.

Likelihood how strong the evidence is that the interaction actually happens in people
  • LikelyWell-controlled human studies have demonstrated the likely existence of this interaction.
  • ProbableInteraction 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.
  • PossibleInteraction 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.
  • UnlikelyInteraction has been demonstrated in animal or in lab research but has been shown not to occur in humans.
Evidence the quality of the studies behind the rating (graded A–D)
  • AHigh-quality meta-analysis (quantitative systematic review).
  • BCase-control study.
  • CConsensus.
  • DAnecdotal evidence.

These ratings are for information only. Never start, stop, or otherwise change your therapy before speaking with your provider.

Keep it in perspective

Capers Also Interacts With Other Medications

Capers has 85 moderate known drug interactions in our database — the Rosiglitazone Maleate one above is one of them. If you take anything else, check it against the full list below.

Moderate 85 No known interaction 2,745 (incl. Rosiglitazone Maleate)
Taking anything else?

Check Another of Your Medications Against Capers

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

Everything else you take

See Every Supplement That Interacts With Rosiglitazone Maleate

This page covers Capers only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Rosiglitazone Maleate page lists 314 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Beer (major), Siberian Cocklebur (major), Wine (major) and Acai (moderate).

By severity: 4 major · 266 moderate · 44 minor.

From our pharmacist’s overview on the Rosiglitazone Maleate page

“Rosiglitazone (Avandia) lowers blood sugar in type 2 diabetes, and most of the 314 supplements and herbs on this page pull on that same lever. Some 239 can move blood glucose on their own, so adding one risks hypoglycemia, the shakiness, sweating, and confusion of sugar falling too low.”

Reviewed by 2 · Jul 18, 2026

Open the Rosiglitazone Maleate interaction page

One more smart check

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

We hold 53 real supplement products containing Capers, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Capers. Your product may carry other ingredients that interact with Rosiglitazone Maleate too, on top of Capers — and those would not show on this page. Find your product and we’ll check every ingredient on its label:

How much people look this up

Where Capers and Rosiglitazone Maleate 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 Capers
Steady interest

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

29 days ago today
Medication Rosiglitazone Maleate
Steady interest

#1,516 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.

Supplement

About Capers

What is Capers?

  • Digestive support
  • Antioxidant source
  • Blood sugar support
  • Anti-inflammatory
  • Skin and traditional tonic uses

Capers are the edible pickled flower buds of the Capparis spinosa shrub, used widely as food and in traditional medicine. They contain antioxidant plant compounds, but high-quality human studies on health benefits are limited, so the supplement claims remain largely unproven. As a food, capers are generally safe, but talk to your pharmacist or doctor before using concentrated extracts.

Read the full Capers monograph & all interactions
Medication

About Rosiglitazone

What Is Rosiglitazone Used For?

Brand name: Avandia

  • Rosiglitazone is used along with a diet and exercise program and sometimes with one or more other medications to treat type 2 diabetes (condition in which the body does not use insulin normally and therefore cannot control the amount of sugar in the blood). Rosiglitazone is in a class of medications called thiazolidinediones. It works by increasing the body's sensitivity to insulin, a natural substance that helps control blood sugar levels. Rosiglitazone is not used to treat type 1 diabetes (condition in which the body does not produce insulin and therefore cannot control the amount of sugar in the blood) or diabetic ketoacidosis (a serious condition that may occur if high blood sugar is not treated).

  • Over time, people who have diabetes and high blood sugar can develop serious or life-threatening complications, including heart disease, stroke, kidney problems, nerve damage, and eye problems. Taking medication(s), making lifestyle changes (e.g., diet, exercise, quitting smoking), and regularly checking your blood sugar may help to manage your diabetes and improve your health. This therapy may also decrease your chances of having a heart attack, stroke, or other diabetes-related complications such as kidney failure, nerve damage (numb, cold legs or feet; decreased sexual ability in men and women), eye problems, including changes or loss of vision, or gum disease. Your doctor and other healthcare providers will talk to you about the best way to manage your diabetes.

See full Rosiglitazone drug information
Keep checking

Other Drugs & Capers

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

0Major
85Moderate
0Minor
2,744No known interaction
85 Moderate 2,744 No interaction
Moderate

85 interactions

Showing 60 of 85 moderate interactions — see all 85 on the Capers page.

No interaction 2,744 drugs checked — show the list

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

Showing the 60 most looked-up of 2,744 medications checked with no known interaction — see the full Capers list.

See the full Capers interactions page
See every supplement checked against Rosiglitazone Maleate, ranked by severity
Sources

Sources & How We Checked

Interaction details are evidence-graded and sourced from the Natural Medicines database. The medication overview comes from MedlinePlus.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

Keep exploring
Capers monograph › Uses, safety, and every drug interaction in one place Rosiglitazone Maleate supplement interactions › Every supplement checked against Rosiglitazone Maleate, ranked by severity Rosiglitazone drug information › The full plain-English guide to this medication Supplement interaction checker › Check any supplement or product against your medications Browse medications A–Z › Every drug we've checked against herbs & supplements Ask a pharmacist › Free, personal answer from our licensed team
Pharmacist Counseling Corner

Taking Capers and Rosiglitazone Maleate Together: Common Questions

Can you take Capers with Rosiglitazone Maleate?
There is a moderate interaction, so it may be acceptable with monitoring or timing changes — but check with your pharmacist first. Read the full details on this page and confirm with your pharmacist before combining them.
How serious is the Capers and Rosiglitazone Maleate interaction?
We rate it Moderate. This combination may require monitoring, a dose adjustment, or separating the times you take each one. Consult your pharmacist before using them together.

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

Still Have a Question About Rosiglitazone Maleate and Capers?

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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.