Drug & supplement interaction

Globemallow + Tolcapone

Tolcapone brand name: Tasmar.

No Known Interaction

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS · Updated June 2026 · Pair last verified Sep 20, 2026

The bottom line No known interaction

We found no known interaction between Globemallow 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.

Know someone taking this? Share

Facebook Post Reddit Email

On this page

Interaction report

Globemallow 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 Globemallow 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 Globemallow 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.

Globemallow safety at a glance

Globemallow overall Not established Little modern safety data exists, so use cautiously and under professional guidance.

Pregnancy Avoid There is no reliable safety information, so it is best avoided during pregnancy.

Breastfeeding Avoid Safety during breastfeeding is unknown, so avoid use to be safe.

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

Still wondering about combining Tolcapone and Globemallow? 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 Globemallow. 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 › Globemallow’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no Globemallow side to compare — that is a limit of the record, not a statement that Globemallow has no side effects.

Everything else you take

See Every Supplement That Interacts With Tolcapone

This page covers Globemallow 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

How much people look this up

Where Globemallow 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 Globemallow

Steady interest

#760 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. Globemallow is not yet covered by that licensed database, so its write-up cites publicly available medical sources directly (see the references below).
Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every Globemallow reference on this page ↓
Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Globemallow and Tolcapone records this page draws on were last updated June 22, 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 Dr. Brian Staiger, PharmD, BCPS.

Supplement

About Globemallow

What is Globemallow?

Soothing skin irritation
Cough and sore throat
Digestive upset
Minor wounds and inflammation
Mouth and throat soothing

Globemallow refers to plants in the genus Sphaeralcea, which have a long history of traditional use among Indigenous peoples of the Americas, mainly as a soothing remedy for skin, throat, and digestive complaints. There is very little modern scientific research on its safety or effectiveness, so its benefits remain unproven. Talk to your pharmacist or doctor before using it, especially if you are pregnant, breastfeeding, or taking other medicines.

Sphaeralcea · Malvaceae · Leaves, flowers, roots, and whole aerial parts · Tea, poultice, dried herb, infusion

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

Globemallow: dosing

There is no established or standardized dose for globemallow. It has not been studied enough to set safe, effective amounts for any use.If you choose to use a globemallow product, follow the directions on the product label and do not exceed them.

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

Read the full Globemallow 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 & Globemallow

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

See the full Globemallow interactions page

See every supplement checked against Tolcapone, ranked by severity

Evidence & sources

Globemallow References

The 2 sources that drive our Globemallow monograph — publicly available pages from reputable medical and government organizations. Every link was verified to work before publishing. Globemallow is not covered by the licensed Natural Medicines interaction database, so its page cites these public sources directly.

Herbs at a Glance — NIH National Center for Complementary and Integrative Health Source
Herbal Supplements — MedlinePlus Source

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 Globemallow and Tolcapone Together: Common Questions

Is it safe to take Globemallow with Tolcapone?

We do not list a known interaction between Globemallow 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 — Globemallow 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

Globemallow 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 2 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Tolcapone and Globemallow?

Our pharmacists answer your medication & supplement questions — free.

Ask a pharmacist

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.