Drug & supplement interaction

Mouse-ear Hawkweed + Clemastine

Clemastine brand name: Tavist Allergy.

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

We found no known interaction between Mouse-ear Hawkweed and Clemastine 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

Mouse-ear Hawkweed and Clemastine

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 Clemastine and Mouse-ear Hawkweed 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 Mouse-ear Hawkweed at all — not against Clemastine, 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.

Mouse-ear Hawkweed safety at a glance

Mouse-ear Hawkweed overall Use caution Traditionally used but lacking modern human safety and effectiveness data, so use cautiously.
Pregnancy Avoid Not enough safety information; best avoided during pregnancy.
Breastfeeding Avoid No reliable safety data, so avoid while breastfeeding.

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

Still wondering about combining Clemastine and Mouse-ear Hawkweed? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

What Clemastine’s Own FDA Label Lists

This is not an interaction — none of it involves Mouse-ear Hawkweed. These are the most notable effects listed in the ADVERSE REACTIONS section of Clemastine’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.

  • Trouble passing urine Worth acting on
  • Wheezing Worth acting on
  • An irregular heartbeat Worth acting on
  • Confusion Worth acting on
  • Seizures Worth acting on
  • A low platelet count Worth acting on
  • Anemia Worth acting on
  • A severe allergic reaction Worth acting on
  • Hives Worth acting on
  • A low white blood cell count Worth acting on

Showing the 10 most notable of 32 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 Clemastine. Read the label on DailyMed › Mouse-ear Hawkweed’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no Mouse-ear Hawkweed side to compare — that is a limit of the record, not a statement that Mouse-ear Hawkweed has no side effects.

From our Q&A

Questions About Mouse-ear Hawkweed or Clemastine

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Mouse-ear Hawkweed or Clemastine, 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 Clemastine

This page covers Mouse-ear Hawkweed only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Clemastine page lists 72 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Henbane (major), Scopolia (major), Alfalfa (moderate) and Angel's Trumpet (moderate).

By severity: 3 major · 57 moderate · 12 minor.

From our pharmacist’s overview on the Clemastine page

“Clemastine (Tavist Allergy) is an older, sedating antihistamine that already dries the mouth, blurs vision, and slows the gut, and that is exactly why this list earns real caution rather than a quick skim. Thirty of the 72 supplements on file pile the same drying, sedating anticholinergic load on top, and two of the three major-rated e…”

Reviewed by 2 · Jul 18, 2026

Open the Clemastine interaction page

How much people look this up

Where Mouse-ear Hawkweed and Clemastine 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 Mouse-ear Hawkweed
Steady interest

#1,253 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Clemastine
Steady interest

#2,318 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. Mouse-ear Hawkweed 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 Mouse-ear Hawkweed reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Mouse-ear Hawkweed and Clemastine 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 .
Supplement

About Mouse-ear Hawkweed

What is Mouse-ear Hawkweed?

Mouse-ear Hawkweed
  • Urinary tract and kidney support
  • Mild diuretic (increasing urine flow)
  • Digestive complaints
  • Coughs and respiratory irritation
  • Wound and skin care (astringent)

Mouse-ear hawkweed is a traditional European herb used mainly for urinary, digestive, and respiratory complaints, but modern human studies are very limited. Because good safety and effectiveness data are lacking, it is best used cautiously and avoided in pregnancy and breastfeeding. Talk with your pharmacist or doctor before trying it, especially if you have a health condition or take medications.

Pilosella officinarum · Asteraceae · Aerial parts (leaves, flowers, and stems), usually the whole flowering herb · Tea (infusion), liquid extract or tincture, dried herb, capsules

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

Mouse-ear Hawkweed: dosing

There is no established standard dose for mouse-ear hawkweed. Traditional use has involved teas made from the dried herb and liquid extracts or tinctures, but reliable, science-based dosing is not available.If you choose to use a product, follow the directions on the label and do not exceed the suggested amount.

From our Mouse-ear Hawkweed monograph — the full record covers uses, side effects and every documented interaction.

Read the full Mouse-ear Hawkweed monograph & all interactions
Medication

About Clemastine

What Is Clemastine Used For?

Brand name: Tavist Allergy

Clemastine treats symptoms of allergic rhinitis (hay fever and similar nasal allergies) — including sneezing, runny nose, itching, and watery eyes. The oral solution (Clemastine Fumarate syrup) is indicated for adults and children aged 6 through 12 years. The tablets (Clemastine Fumarate and Clemsza) are indicated for adults.

Clemastine also treats mild, uncomplicated allergic skin reactions — specifically urticaria (hives) and angioedema (swelling under the skin) — at the appropriate dosage level, in both the oral solution and tablet forms.

See full Clemastine drug information
Keep checking

Other Drugs & Mouse-ear Hawkweed

Browse every other medication we’ve checked against Mouse-ear Hawkweed — 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 Mouse-ear Hawkweed 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 Mouse-ear Hawkweed list.

See the full Mouse-ear Hawkweed interactions page
See every supplement checked against Clemastine, ranked by severity
Evidence & sources

Mouse-ear Hawkweed References

The 3 sources that drive our Mouse-ear Hawkweed monograph — publicly available pages from reputable medical and government organizations. Every link was verified to work before publishing. Mouse-ear Hawkweed is not covered by the licensed Natural Medicines interaction database, so its page cites these public sources directly.

  1. Hawkweed (Hieracium) information — MedlinePlus Source
  2. Using Dietary Supplements Wisely — NIH NCCIH Source
  3. Dietary Supplements: What You Need to Know — NIH Office of Dietary Supplements 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 Mouse-ear Hawkweed and Clemastine Together: Common Questions

Is it safe to take Mouse-ear Hawkweed with Clemastine?
We do not list a known interaction between Mouse-ear Hawkweed and Clemastine. 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 Clemastine interact with any supplements?
Yes. Clemastine has documented interactions with 72 supplements in our database — Mouse-ear Hawkweed is not one of them. The Clemastine 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

Mouse-ear Hawkweed monograph Uses, safety profile, and every drug interaction in one place Clemastine drug information The full plain-English guide to this medication Clemastine supplement interactions Every supplement checked against Clemastine, 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 3 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Clemastine and Mouse-ear Hawkweed?

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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.