Drug & supplement interaction

Meadowsweet + Obinutuzumab

Obinutuzumab brand name: Gazyva.

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 Meadowsweet and Obinutuzumab 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. Additionally, although there is no interaction, the label for Obinutuzumab states a food rule worth keeping to.

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Interaction report

Meadowsweet and Obinutuzumab

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 Obinutuzumab and Meadowsweet 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.

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.

Meadowsweet safety at a glance

Meadowsweet overall Use caution Generally used in food-like amounts, but it contains salicylates and human safety data are limited.
Pregnancy Likely Unsafe When used orally. Some evidence suggests meadowsweet might stimulate uterine activity. Read the full pregnancy detail
Breastfeeding Avoid Not enough safety information; best avoided while breastfeeding.

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center) — the full detail is in the Special populations card below. Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Obinutuzumab and Meadowsweet? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
Keep it in perspective

Meadowsweet Does Interact With Other Medications

Meadowsweet has 39 moderate known drug interactions in our database — Obinutuzumab isn’t one of them. If you take anything else, check it against the full list below.

Moderate 39 No known interaction 2,791 (incl. Obinutuzumab)
Taking anything else?

Check Another of Your Medications Against Meadowsweet

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

What to actually watch for

What Meadowsweet Itself Has Been Linked To

This is not an interaction — nothing below involves Obinutuzumab. It is the side-effect record for Meadowsweet on its own, from the licensed Natural Medicines monograph. If something new turns up after you add Meadowsweet, this list is the first place to look.

  • Ringing in the ears Additional detail

    “Meadowsweet contains salicylate constituents. There is insufficient reliable information available to know if the side effects and toxicity normally associated with salicylates could occur with meadowsweet use. Orally, adverse reactions with salicylates include tinnitus (4).”

    Meadowsweet · Natural Medicines adverse-effect record, reported in tinnitus.

    1 source cited
    1. 4. Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for Healthcare Professionals. London, UK: The Pharmaceutical Press, 1996.
  • Stomach upset / Vomiting / Nausea Additional detail

    “Orally, large doses of meadowsweet can cause nausea and other stomach complaints (18).

    Meadowsweet contains salicylate constituents. There is insufficient reliable information available to know if the side effects and toxicity normally associated with salicylates could occur with meadowsweet use. Adverse reactions associated with salicylates include gastric irritation, hematochezia, nausea, and vomiting (4).”

    Meadowsweet · Natural Medicines adverse-effect record, reported in nausea and vomiting.

    2 sources cited
    1. 18. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
    2. 4. Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for Healthcare Professionals. London, UK: The Pharmaceutical Press, 1996.

Everything above comes from the Natural Medicines adverse-effect record for Meadowsweet — expand a row for the licensed statement it rests on. We read the ADVERSE REACTIONS section of Obinutuzumab’s FDA label too, and the two lists don’t meaningfully overlap — which is why no Obinutuzumab column appears here.

Special populations

Meadowsweet in Pregnancy & Breastfeeding

Pregnancy Likely Unsafe

When used orally. Some evidence suggests meadowsweet might stimulate uterine activity.

DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.© 2026 Therapeutic Research Center

How to take them

Some Obinutuzumab Products Have a Food Rule — Meadowsweet Should Not Break It

At least one FDA label for a product containing Obinutuzumab says to take it on an empty stomach. Most supplements — Meadowsweet included — are taken with a meal, so the easy mistake is swallowing both together at breakfast. Where that rule applies, keep Obinutuzumab on its own and move Meadowsweet to a meal later in the day.

This may not be true of your version. Food instructions belong to the product, not the ingredient: two Obinutuzumab products can carry different directions, and extended-release forms often differ from immediate-release ones. The label we read is quoted below — check the directions on your own box or bottle, or ask your pharmacist, for how to take the exact product you were given.

650–1,000 mg acetaminophen At least 30 minutes before GAZYVA infusion.

From the Dosage and Administration section of the FDA label we read for Obinutuzumab — where that label names a specific product, the instruction is that product's. See the Obinutuzumab drug page ›

A food rule is not an interaction — it is about how much of the medicine you absorb. The directions that came with your own product, and your pharmacist, outrank anything on this page.

One more smart check

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

We hold 197 real supplement products containing Meadowsweet, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Meadowsweet. Even though Meadowsweet itself has no known interaction with Obinutuzumab, 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 Meadowsweet and Obinutuzumab 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 Meadowsweet
Top half

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

29 days ago today
Medication Obinutuzumab
Steady interest

#2,267 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 Meadowsweet reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Meadowsweet and Obinutuzumab records this page draws on were last updated July 11, 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 Meadowsweet

What is Meadowsweet?

Meadowsweet
  • Heartburn and indigestion
  • Cold and flu symptoms
  • Mild aches and pains
  • Fever
  • Joint discomfort

Meadowsweet is a traditional European herb that contains natural salicylates (aspirin-like compounds) and is used mainly for digestive upset, colds, and minor aches. High-quality human studies are lacking, so its benefits are not well proven, and people sensitive to aspirin should be cautious. Talk with your pharmacist or doctor before using it.

Filipendula ulmaria · Rosaceae · Flowers and above-ground (aerial) parts, sometimes the root · Tea, dried herb, tincture, liquid extract, capsules

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

Meadowsweet: dosing

There is no well-established, standardized dose for meadowsweet. Traditional use varies widely depending on the form — for example, dried flowers steeped as a tea, or a tincture or capsule taken according to the maker's directions.Because product strengths differ a great deal, the safest approach is to follow the directions on the product label and not exceed the recommended amount.

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

Read the full Meadowsweet monograph & all interactions
Medication

About Obinutuzumab Injection

What Is Obinutuzumab Injection Used For?

Brand name: Gazyva

Gazyva is used to treat three conditions. For chronic lymphocytic leukemia (CLL), it is given in combination with chlorambucil in patients who have not been treated before. For follicular lymphoma (FL), it is used either with bendamustine (for patients whose disease came back or stopped responding to a rituximab-based regimen) or with chemotherapy (for previously untreated advanced disease) — in both cases followed by Gazyva alone as maintenance therapy.

Gazyva is also approved for active lupus nephritis — a type of kidney inflammation caused by lupus — in adults who are already receiving standard therapy for the condition.

See full Obinutuzumab Injection drug information
Keep checking

Other Drugs & Meadowsweet

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

0Major
39Moderate
0Minor
2,790No known interaction
39 Moderate 2,790 No interaction
Moderate

39 interactions

No interaction 2,790 drugs checked — show the list

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

Showing the 60 most looked-up of 2,790 medications checked with no known interaction — see the full Meadowsweet list.

See the full Meadowsweet interactions page
See every supplement checked against Obinutuzumab, ranked by severity
Evidence & sources

Meadowsweet References

The 3 references that drive our Meadowsweet 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. Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for Healthcare Professionals. London, UK: The Pharmaceutical Press, 1996.
  2. McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
  3. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.

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 Meadowsweet and Obinutuzumab Together: Common Questions

Is it safe to take Meadowsweet with Obinutuzumab?
We do not list a known interaction between Meadowsweet and Obinutuzumab. 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.
Should I take Meadowsweet and Obinutuzumab at the same time of day?
At least one FDA label for a product containing Obinutuzumab says to take it on an empty stomach, and supplements are usually taken with a meal — so taking them together at breakfast is the easy mistake. Where that applies, keep Obinutuzumab on its own and move Meadowsweet to a meal later in the day. Food instructions belong to the product rather than the ingredient, so check the directions on your own box. This is about absorption, not an interaction.
Does Meadowsweet interact with any other medications?
Yes. Meadowsweet has 39 documented drug interactions in our database — Obinutuzumab is simply not one of them. If you take anything else, it is worth checking each one; they are all listed on this page.

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

Where next

Keep Exploring

Meadowsweet monograph Uses, safety profile, and every drug interaction in one place Obinutuzumab Injection drug information The full plain-English guide to this medication Obinutuzumab supplement interactions Every supplement checked against Obinutuzumab, 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 Obinutuzumab and Meadowsweet?

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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.