Drug & supplement interaction

Hyacinth Bean + Tolcapone

Tolcapone brand name: Tasmar.

No Known Interaction
Medically reviewed by · Updated July 2026 · Pair last verified Sep 20, 2026
The bottom line No known interaction

We found no known interaction between Hyacinth Bean and Tolcapone 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

Hyacinth Bean and Tolcapone

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 Tolcapone and Hyacinth Bean 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 Hyacinth Bean at all — not against Tolcapone, 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.

Hyacinth Bean safety at a glance

Hyacinth Bean overall Use caution Cooked beans are widely eaten as food, but raw or undercooked beans can be toxic and concentrated supplement use is not well studied.
Pregnancy Use caution Eating well-cooked beans as food is likely fine, but medicinal or supplement amounts have not been proven safe and should be avoided.
Breastfeeding Use caution Little reliable safety information exists for medicinal use, so caution is advised beyond normal dietary amounts.

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

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

What Tolcapone’s Own FDA Label Lists

This is not an interaction — none of it involves Hyacinth Bean. These are the most notable effects listed in the ADVERSE REACTIONS section of Tolcapone’s own FDA label, for the medication by itself. Knowing the drug’s own list makes it easier to work out the likely cause if something new turns up while you take both. 10 of them are worth acting on rather than waiting out — marked below.

  • A stroke or mini-stroke Worth acting on
  • Pain or burning when passing urine Worth acting on
  • Memory problems Worth acting on
  • Dehydration Worth acting on
  • Trouble swallowing Worth acting on
  • Bleeding in the gut Worth acting on
  • Trouble passing urine Worth acting on
  • A slow heartbeat Worth acting on
  • Blood clots Worth acting on
  • Hallucinations Worth acting on

Showing the 10 most notable of 69 label-listed effects — ranked by how unusual each one is across medicines generally, with serious effects weighted up.

From the ADVERSE REACTIONS section of the FDA label for Tolcapone. Read the label on DailyMed › Hyacinth Bean’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no Hyacinth Bean side to compare — that is a limit of the record, not a statement that Hyacinth Bean has no side effects.

Everything else you take

See Every Supplement That Interacts With Tolcapone

This page covers Hyacinth Bean only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Tolcapone page lists 58 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 Ashwagandha (moderate).

By severity: 4 major · 45 moderate · 9 minor.

Open the Tolcapone interaction page

One more smart check

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

We hold 37 real supplement products containing Hyacinth Bean, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Hyacinth Bean. Even though Hyacinth Bean itself has no known interaction with Tolcapone, 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 Hyacinth Bean and Tolcapone 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 Hyacinth Bean
Steady interest

#1,033 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Tolcapone
Steady interest

#2,603 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 Hyacinth Bean reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Hyacinth Bean and Tolcapone 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 Hyacinth Bean

What is Hyacinth Bean?

  • Digestive upset and diarrhea
  • Nausea and poor appetite
  • General nourishment
  • Traditional summer 'heat' remedy
  • Mild fatigue or weakness

Hyacinth bean is a widely grown food legume that is also used in traditional medicine, mainly for digestive complaints. The cooked beans are eaten as food in many countries, but the raw or undercooked beans contain natural toxins and must be thoroughly cooked. Strong human evidence for its medicinal uses is lacking, so treat any health claims with caution and talk to your pharmacist or doctor.

Lablab purpureus · Fabaceae · Seeds (beans), pods, leaves, and flowers · Cooked beans, dried seeds, traditional decoctions, powders, and capsules

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

Hyacinth Bean: dosing

There is no well-established standardized medicinal dose for hyacinth bean. As a food, it is simply prepared and eaten like other dried beans after thorough soaking and cooking.For any supplement or traditional preparation, follow the directions on the product label and do not exceed the recommended amount.

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

Read the full Hyacinth Bean monograph & all interactions
Medication

About Tolcapone

What Is Tolcapone Used For?

Brand name: Tasmar

Tolcapone tablets are used as an add-on treatment to levodopa and carbidopa for idiopathic Parkinson's disease (Parkinson's disease with no known cause). Both Tasmar and tolcapone tablets (generic) carry this indication.

Because of a serious risk of liver failure, tolcapone is ordinarily reserved for patients who are experiencing symptom fluctuations — such as "wearing-off" episodes between doses — and who are not responding satisfactorily to, or are not appropriate candidates for, other add-on therapies.

Most-Reported Side Effects for Tolcapone

From FAERS, the FDA’s public side-effect reporting system (349 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Fall 30 reports
Hallucination 27 reports
Dyskinesia 26 reports
Pneumonia 20 reports
General physical health deterioration 19 reports
See full Tolcapone drug information
Keep checking

Other Drugs & Hyacinth Bean

Browse every other medication we’ve checked against Hyacinth Bean — 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 Hyacinth Bean 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 Hyacinth Bean list.

See the full Hyacinth Bean interactions page
See every supplement checked against Tolcapone, ranked by severity
Evidence & sources

Hyacinth Bean References

The 1 references that drive our Hyacinth Bean 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. Dawson IK, Jaenicke H. Underutilised Plant Species: The Role of Biotechnology. Position Paper No. 1. Colombo, Sri Lanka: International Centre for Underutilised Crops; 2006.

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 Hyacinth Bean and Tolcapone Together: Common Questions

Is it safe to take Hyacinth Bean with Tolcapone?
We do not list a known interaction between Hyacinth Bean and Tolcapone. 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.
Does Tolcapone interact with any supplements?
Yes. Tolcapone has documented interactions with 58 supplements in our database — Hyacinth Bean is not one of them. The Tolcapone 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

Hyacinth Bean monograph Uses, safety profile, and every drug interaction in one place Tolcapone drug information The full plain-English guide to this medication Tolcapone supplement interactions Every supplement checked against Tolcapone, 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 1 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Tolcapone and Hyacinth Bean?

Our pharmacists answer your medication & supplement questions — free.

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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.