Drug & supplement interaction

Jequirity + Cilostazol

Cilostazol brand name: Pletal.

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

Cilostazol falls into 2 drug categories that Jequirity can interact with; the most serious is rated moderate. Evidence from in vitro research suggests that constituents of jequirity beans can inhibit platelet aggregation.

Read the full interaction report
SeverityModerate
LikelihoodPossible
Interactions2
EvidenceD
What do Severity, Likelihood & Evidence mean?
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Interaction report

Jequirity and Cilostazol

These two interact in 2 distinct ways. Each one is explained separately below.

Why Are There 2 Interactions?

Jequirity interacts with whole categories of medication. Cilostazol falls into 2 of those categories, so it can interact with Jequirity in 2 different ways. We’ve listed each one below — your overall risk is driven by the most serious of them (Moderate).

Moderate

ANTICOAGULANT/ANTIPLATELET DRUGS

1 of 2

Why this applies to Cilostazol

Cilostazol falls under ANTICOAGULANT/ANTIPLATELET DRUGS — the group Jequirity interacts with.

Evidence from in vitro research suggests that constituents of jequirity beans can inhibit platelet aggregation. Theoretically, jequirity might increase the risk of bleeding when used with antiplatelet or anticoagulant drugs. Some anticoagulant or antiplatelet drugs include aspirin, clopidogrel (Plavix), dalteparin (Fragmin), enoxaparin (Lovenox), heparin, ticlopidine (Ticlid), warfarin (Coumadin), and others.
Severity Moderate Likelihood Possible Evidence D

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 short version: cilostazol (Pletal) already works as an antiplatelet drug, meaning it keeps your platelets from clumping together so blood flows more easily through your legs. Lab studies hint that compounds in jequirity beans may also slow platelet clumping. Put the two together and, at least in theory, you could be stacking two blood-thinning effects on top of each other.

If that happened, you might notice things like easier bruising, nosebleeds, bleeding gums, or cuts that take longer to stop. I'll be honest with you, though, this concern is theoretical and comes only from test-tube research, not real patients. The bigger issue is that jequirity seeds contain abrin, a severe poison, so they shouldn't be taken at all. Please talk with your pharmacist or doctor before mixing anything with cilostazol.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Kuo SC, Chen SC, Chen LH, et al. Potent antiplatelet, anti-inflammatory and antiallergic isoflavanquinones from the roots of Abrus precatorius. Planta Med 1995;61:307-12.
Minor

CYTOCHROME P450 3A4 (CYP3A4) SUBSTRATES

2 of 2

Cilostazol also falls under CYTOCHROME P450 3A4 (CYP3A4) SUBSTRATES.

In vitro research shows that jequirity extract inhibits CYP3A4 enzymes. Theoretically, taking jequirity may inhibit the metabolism of CYP3A4 substrates.
Severity Minor Likelihood Unlikely Evidence D

Interaction has been demonstrated in animal or in lab research but has been shown not to occur in humans..

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

First things first: jequirity seeds contain abrin, a toxin in the same family as ricin. Please don't take this plant at all. The bigger danger here isn't the drug interaction, it's the poison itself.

That said, here's the theory on file. Your body clears cilostazol using a liver enzyme called CYP3A4, and lab dish studies suggest jequirity can slow that enzyme down. If that happened in real life, cilostazol could build up and you might see more of its usual effects, things like headache, dizziness, a racing or pounding heartbeat, and a higher chance of bruising or bleeding. But this is only test-tube evidence, rated very weak, and a real-world effect is considered unlikely. Either way, talk with your pharmacist or doctor before combining anything new.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Ai C, Miao X, Wang L, He J. Discovery and Activity Evaluation of the Inhibitory Effect of Four Kinds Traditional Chinese Medicine Extracts on the CYP3A4 Enzyme. Comb Chem High Throughput Screen 2022.

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

Jequirity Also Interacts With Other Medications

Jequirity has 207 moderate, 603 minor known drug interactions in our database — the Cilostazol one above is among them. If you take anything else, check it against the full list below.

Moderate 207 Minor 603 No known interaction 2,020 (incl. Cilostazol)
Taking anything else?

Check Another of Your Medications Against Jequirity

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

From our Q&A

Questions About Jequirity or Cilostazol

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Jequirity or Cilostazol, 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 Cilostazol

This page covers Jequirity only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Cilostazol page lists 286 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Danshen (major), Grapefruit (major), Piracetam (major) and St. John's Wort (major).

By severity: 5 major · 240 moderate · 41 minor.

Open the Cilostazol interaction page

How much people look this up

Where Jequirity and Cilostazol 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 Jequirity
Steady interest

#1,147 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Cilostazol
Steady interest

#1,776 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 Jequirity

What is Jequirity?

Jequirity
  • Asthma and cough
  • Fever
  • Sore throat and bronchitis
  • Liver complaints (hepatitis)
  • Constipation
  • Traditional infectious-disease remedies

Jequirity (Abrus precatorius) is a tropical plant whose bright red, black-tipped seeds contain abrin, one of the most toxic plant proteins known. Despite a long history in traditional medicine, the seeds are dangerously poisonous and there is no reliable evidence that it is safe or effective. It should not be used as a supplement or medicine.

Read the full Jequirity monograph & all interactions
Medication

About Cilostazol

What Is Cilostazol Used For?

Brand name: Pletal

Cilostazol tablets are approved to reduce the symptoms of intermittent claudication (cramping leg pain that comes on during walking due to reduced blood flow in the arteries). The goal is to help you walk farther before pain forces you to stop.

See full Cilostazol drug information
Keep checking

Other Drugs & Jequirity

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

0Major
207Moderate
603Minor
2,019No known interaction
207 Moderate 603 Minor 2,019 No interaction
Moderate

207 interactions

Showing 60 of 207 moderate interactions — see all 207 on the Jequirity page.

Minor

603 interactions

Showing 60 of 603 minor interactions — see all 603 on the Jequirity page.

No interaction 2,019 drugs checked — show the list

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

Showing the 60 most looked-up of 2,019 medications checked with no known interaction — see the full Jequirity list.

See the full Jequirity interactions page
See every supplement checked against Cilostazol, 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
Jequirity monograph › Uses, safety, and every drug interaction in one place Cilostazol supplement interactions › Every supplement checked against Cilostazol, ranked by severity Cilostazol 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 Jequirity and Cilostazol Together: Common Questions

Can you take Jequirity with Cilostazol?
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.
Why are there 2 interactions listed for Jequirity and Cilostazol?
Cilostazol belongs to more than one drug category, and Jequirity interacts with each of those categories a little differently. We list every one so nothing is missed — your overall risk is driven by the most serious of them.
How serious is the Jequirity and Cilostazol 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 Cilostazol and Jequirity?

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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.