Drug & supplement interaction

Duckweed + Elbasvir, Grazoprevir

Elbasvir, Grazoprevir brand name: Zepatier.

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 Duckweed and Elbasvir, Grazoprevir 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

Duckweed and Elbasvir, Grazoprevir

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 Elbasvir, Grazoprevir and Duckweed 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 Duckweed at all — not against Elbasvir, Grazoprevir, 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.

Duckweed safety at a glance

Duckweed overall Use caution Generally considered a food in some cultures, but supplement quality and water contamination are real concerns.
Pregnancy Avoid There is not enough reliable safety information, so avoidance is the safer choice.
Breastfeeding Avoid Safety during breastfeeding has not been established, so avoid it.

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

Still wondering about combining Elbasvir, Grazoprevir and Duckweed? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

What Elbasvir, Grazoprevir’s Own FDA Label Lists

This is not an interaction — none of it involves Duckweed. These are the most notable effects listed in the ADVERSE REACTIONS section of Elbasvir, Grazoprevir’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. 7 of them are worth acting on rather than waiting out — marked below.

  • Low mood Worth acting on
  • Kidney problems Worth acting on
  • Anemia Worth acting on
  • Shortness of breath Worth acting on
  • A severe allergic reaction Worth acting on
  • Liver problems Worth acting on
  • A higher chance of infection Worth acting on
  • Tiredness mentioned in 22.6% of FDA reports for Elbasvir, Grazoprevir
  • Mood changes or irritability
  • Trouble sleeping mentioned in 7.3% of FDA reports for Elbasvir, Grazoprevir

Showing the 10 most notable of 17 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 Elbasvir, Grazoprevir. Read the label on DailyMed › Where a percentage is shown, it is the share of 4,243 voluntary FDA FAERS reports for Elbasvir, Grazoprevir that mention that effect — a reporting proportion, not an incidence rate and not evidence the drug caused it. Duckweed’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no Duckweed side to compare — that is a limit of the record, not a statement that Duckweed has no side effects.

Everything else you take

See Every Supplement That Interacts With Elbasvir, Grazoprevir

This page covers Duckweed only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Elbasvir, Grazoprevir page lists 140 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Grapefruit (major), St. John's Wort (major), Acacia Rigidula (moderate) and Adrafinil (moderate).

By severity: 3 major · 96 moderate · 41 minor.

From our pharmacist’s overview on the Elbasvir, Grazoprevir page

“Zepatier (elbasvir and grazoprevir) is a fixed-course hepatitis C cure, and success depends on holding steady drug levels through every week of treatment, so this list deserves genuine care. Three of the 140 ingredients on file rate major.”

Reviewed by 2 · Jul 18, 2026

Open the Elbasvir, Grazoprevir interaction page

One more smart check

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

We hold 6 real supplement products containing Duckweed, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Duckweed. Even though Duckweed itself has no known interaction with Elbasvir, Grazoprevir, 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 Duckweed and Elbasvir, Grazoprevir 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 Duckweed
Steady interest

#1,042 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Elbasvir, Grazoprevir
Steady interest

#2,346 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. Duckweed 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 Duckweed reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Duckweed and Elbasvir, Grazoprevir 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 Duckweed

What is Duckweed?

  • Plant-based protein source
  • Source of vitamins and minerals
  • Traditional remedy for fever and inflammation
  • Skin conditions and rashes
  • General nutrition and wellness

Duckweed is a tiny floating water plant being studied as a nutrient-dense, plant-based protein and food source. Human evidence for any specific health benefit is very limited, and safety depends heavily on the plant being grown in clean, uncontaminated water. Talk to a pharmacist or doctor before using it as a supplement.

Lemnaceae · Whole plant (fronds) · Powder, capsules, tablets, dried whole plant, protein supplements, traditional decoctions

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

Duckweed: dosing

There is no official, standardized dose for duckweed supplements. The right amount has not been established in clinical research, and products vary widely in concentration and form.If you choose to use a duckweed product, follow the directions on the label and do not exceed the recommended amount.

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

Read the full Duckweed monograph & all interactions
Medication

About Elbasvir and Grazoprevir

What Is Elbasvir and Grazoprevir Used For?

Brand name: Zepatier

Zepatier treats chronic hepatitis C virus (HCV) genotype 1 or genotype 4 infection in adults and children 12 years of age and older (or weighing at least 30 kg). It works for people who have never been treated before as well as those who have tried certain other treatments.

Depending on the specific genotype and treatment history, Zepatier may be prescribed on its own or combined with another antiviral medicine called ribavirin. Your prescriber will determine the right combination and length of treatment for your situation.

See full Elbasvir and Grazoprevir drug information
Keep checking

Other Drugs & Duckweed

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

See the full Duckweed interactions page
See every supplement checked against Elbasvir, Grazoprevir, ranked by severity
Evidence & sources

Duckweed References

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

  1. Dietary Supplements: What You Need to Know — NIH Office of Dietary Supplements Source
  2. Using Dietary Supplements Wisely — NIH NCCIH 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 Duckweed and Elbasvir, Grazoprevir Together: Common Questions

Is it safe to take Duckweed with Elbasvir, Grazoprevir?
We do not list a known interaction between Duckweed and Elbasvir, Grazoprevir. 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 Elbasvir, Grazoprevir interact with any supplements?
Yes. Elbasvir, Grazoprevir has documented interactions with 140 supplements in our database — Duckweed is not one of them. The Elbasvir, Grazoprevir 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

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

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.