Drug & supplement interaction

Isatis + Lamivudine

Lamivudine brand names: Epivir, Epivir-HBV.

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 Isatis and Lamivudine 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

Isatis and Lamivudine

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 Lamivudine and Isatis 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 Isatis at all — not against Lamivudine, 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.

Isatis safety at a glance

Isatis overall Use caution Generally used short-term in traditional medicine, but human safety data are limited.
Pregnancy Avoid Not enough safety information, so it is best avoided during pregnancy.
Breastfeeding Avoid There is 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 Lamivudine and Isatis? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

What Lamivudine’s Own FDA Label Lists

This is not an interaction — none of it involves Isatis. These are the most notable effects listed in the ADVERSE REACTIONS section of Lamivudine’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.

  • An electrolyte imbalance Worth acting on
  • Severe muscle breakdown Worth acting on
  • Muscle weakness Worth acting on
  • Dehydration Worth acting on
  • Low blood sugar Worth acting on
  • Pancreatitis Worth acting on
  • Yellowing of the skin or eyes Worth acting on
  • High blood sugar Worth acting on
  • Seizures Worth acting on
  • Anemia Worth acting on

Showing the 10 most notable of 27 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 Lamivudine. Read the label on DailyMed › Isatis’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no Isatis side to compare — that is a limit of the record, not a statement that Isatis has no side effects.

Overlapping uses

What Lamivudine Is Prescribed For, and What Isatis Has Been Studied For

These two come up together because they touch the same health topic — not because they do the same job. Lamivudine is a prescription medicine with approved uses on its FDA label. Isatis is a supplement: what follows is what researchers have looked at it for, and how strong that evidence is.

Lamivudine is prescribed for: Lamivudine is used to treat HIV-1 infection. Epivir (lamivudine) tablets and oral solution, and lamivudine tablets and oral solution for HIV-1, are all used in combination with other antiretroviral medicines — lamivudine is never used alone for HIV-1. The dose in these products is specifically sized for HIV-1 treatment and is not appropriate for treating hepatitis B. A separate, lower-dose product — lamivudine tablets (HBV) — is indicated for the treatment of chronic hepatitis B virus (HBV) infection in adults with evidence of active viral replication and liver inflammation.

Read the rest of what Lamivudine is prescribed for

Because resistance to lamivudine develops at a high rate, the HBV tablets should only be considered when other antiviral options with a higher barrier to resistance are not available or appropriate.

Isatis has been studied for:

  • Hepatitis studied, not established Isatis has been studied for this. Natural Medicines rates the evidence: Insufficient Reliable Evidence To Rate Read what the research shows

    Isatis for hepatitis

    Although there is interest in using oral isatis for hepatitis, there is insufficient reliable information about the clinical effects of isatis for this condition.

Effectiveness ratings and the research summaries above are the verbatim record from the Natural Medicines database, which grades evidence from “Effective” down to “Insufficient Reliable Evidence To Rate”. A rating below the top of that scale means researchers have looked at it — not that it works, and never that it can stand in for a prescribed medicine. Do not stop or replace Lamivudine on your own; if you are taking Isatis for the same health topic, tell your prescriber, especially if the medicine is being adjusted to a target.

Everything else you take

See Every Supplement That Interacts With Lamivudine

This page covers Isatis only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Lamivudine page lists 18 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Coffee Charcoal (moderate), European Mandrake (moderate), Glucomannan (moderate) and Guar Gum (moderate).

By severity: 1 major · 8 moderate · 9 minor.

From our pharmacist’s overview on the Lamivudine page

“Lamivudine (Epivir, Epivir-HBV) only holds HIV or hepatitis B in check if enough of each dose reaches the bloodstream, and nearly all 18 supplements on this list can interfere with exactly that. Activated charcoal, the single major-rated entry, can adsorb the drug outright, while fibers, gums, and mucilage herbs such as psyllium can sl…”

Reviewed by 2 · Jul 18, 2026

Open the Lamivudine interaction page

One more smart check

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

We hold 413 real supplement products containing Isatis, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Isatis. Even though Isatis itself has no known interaction with Lamivudine, 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 Isatis and Lamivudine 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 Isatis
Top 25%

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

29 days ago today
Medication Lamivudine
Steady interest

#2,198 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. Isatis 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 Isatis reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Isatis and Lamivudine 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 Isatis

What is Isatis?

  • Colds and flu-like illness
  • Sore throat
  • Fever
  • Immune support
  • Antiviral and antimicrobial support

Isatis is a plant long used in traditional Chinese medicine, mainly for sore throats, fevers, and colds. Modern evidence in people is very limited, so its benefits are not well proven. Talk with your pharmacist or doctor before using it, and avoid it during pregnancy and breastfeeding.

Isatis tinctoria · Brassicaceae · Root (Ban Lan Gen) and leaf (Da Qing Ye) · Capsules, tablets, granules, powders, teas, and tinctures

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

Isatis: dosing

There is no well-established standard dose for Isatis. Traditional preparations and modern products vary widely in strength and form.If you choose to use it, follow the directions on the product label and do not exceed the recommended amount. A pharmacist or qualified healthcare provider can help you decide whether it is appropriate for you and review your other medicines and health conditions first.

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

Read the full Isatis monograph & all interactions
Medication

About Lamivudine

What Is Lamivudine Used For?

Brand names: Epivir, Epivir-HBV

Lamivudine is used to treat HIV-1 infection. Epivir (lamivudine) tablets and oral solution, and lamivudine tablets and oral solution for HIV-1, are all used in combination with other antiretroviral medicines — lamivudine is never used alone for HIV-1. The dose in these products is specifically sized for HIV-1 treatment and is not appropriate for treating hepatitis B.

A separate, lower-dose product — lamivudine tablets (HBV) — is indicated for the treatment of chronic hepatitis B virus (HBV) infection in adults with evidence of active viral replication and liver inflammation. Because resistance to lamivudine develops at a high rate, the HBV tablets should only be considered when other antiviral options with a higher barrier to resistance are not available or appropriate.

See full Lamivudine drug information
Keep checking

Other Drugs & Isatis

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

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

Isatis References

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

  1. Herbs at a Glance — NIH NCCIH Source
  2. Herbs and Supplements — MedlinePlus Source
  3. About Herbs, Botanicals & Other Products — Memorial Sloan Kettering Cancer Center 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 Isatis and Lamivudine Together: Common Questions

Is it safe to take Isatis with Lamivudine?
We do not list a known interaction between Isatis and Lamivudine. 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.
Are Isatis and Lamivudine used for the same thing?
They overlap in purpose, which usually means the real question is whether you need both rather than whether they are safe together. This page lists the shared uses and how strong the evidence is for Isatis in each. That is a conversation for your prescriber, especially if Lamivudine is being adjusted to a target.
Does Lamivudine interact with any supplements?
Yes. Lamivudine has documented interactions with 18 supplements in our database — Isatis is not one of them. The Lamivudine 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

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

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.