Drug & supplement interaction

Black Root + Loncastuximab Tesirine-Lpyl

Loncastuximab Tesirine-Lpyl brand name: Zynlontab.

No Known Interaction

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

The bottom line No known interaction

We found no known interaction between Black Root and Loncastuximab Tesirine-Lpyl 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

Black Root and Loncastuximab Tesirine-Lpyl

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 Loncastuximab Tesirine-Lpyl and Black Root 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.

Black Root safety at a glance

Black Root overall Use caution Modern safety data are limited and the fresh root can cause significant digestive toxicity.

Pregnancy Possibly Unsafe When the fresh root is used orally. Anecdotally, fresh black root has been reported for have abortifacient and teratogenic effects. However, there is no reliabl... Read the full pregnancy detail

Breastfeeding Avoid Avoid while breastfeeding due to insufficient safety information.

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 Loncastuximab Tesirine-Lpyl and Black Root? Ask Dr. Brian Staiger, PharmD, BCPS directly ›

How we checked

Why No Interaction Is Listed for Loncastuximab Tesirine-Lpyl

Interactions in our licensed database are recorded against drug classes, not just single drug names. Loncastuximab Tesirine-Lpyl is filed under a single classification — p-glycoprotein substrates. Black Root has documented interactions with 3 drug classes — the most serious being digoxin (lanoxin) (moderate), diuretic drugs (moderate) and warfarin (coumadin) (moderate) — and none of Loncastuximab Tesirine-Lpyl’s classifications are among them.

Classification data comes from our licensed Natural Medicines dataset. A medication can belong to classes beyond those recorded there, so this describes how the check was run — it is not a safety guarantee.

Keep it in perspective

Black Root Does Interact With Other Medications

Black Root has 78 moderate known drug interactions in our database — Loncastuximab Tesirine-Lpyl isn’t one of them. If you take anything else, check it against the full list below.

Moderate 78 No known interaction 2,752 (incl. Loncastuximab Tesirine-Lpyl)

Taking anything else?

Check Another of Your Medications Against Black Root

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

What to actually watch for

What Black Root Itself Has Been Linked To

This is not an interaction — nothing below involves Loncastuximab Tesirine-Lpyl. It is the side-effect record for Black Root on its own, from the licensed Natural Medicines monograph. If something new turns up after you add Black Root, this list is the first place to look. One entry is worth acting on rather than waiting out — marked below.

Liver problems Worth acting on Additional detail
“Orally, black root can cause abdominal pain or cramps, changes in stool color or odor, drowsiness, headache, nausea, and vomiting. Hepatotoxicity has been reported after ingestion of large amounts.”

Black Root · Natural Medicines adverse-effect record, reported in cluster headache.
1 source cited

6002. Fetrow CW, Avila JR. Professional's Handbook of Complementary & Alternative Medicines. 1st ed. Springhouse, PA: Springhouse Corp., 1999.
Drowsiness / Stomach pain / Vomiting / Headache / Nausea Additional detail

Recorded for Black Root in the same Natural Medicines adverse-effect record shown under Liver problems above.

Everything above comes from the Natural Medicines adverse-effect record for Black Root — expand a row for the licensed statement it rests on. We haven’t matched Loncastuximab Tesirine-Lpyl to its FDA label in our system yet, so we can’t compare its own side-effect list here — the leaflet that comes with your prescription is the authoritative list for Loncastuximab Tesirine-Lpyl.

Special populations

Black Root in Pregnancy & Breastfeeding

Pregnancy Possibly Unsafe

When the fresh root is used orally. Anecdotally, fresh black root has been reported for have abortifacient and teratogenic effects. However, there is no reliable scientific evidence about the effects of black root on pregnancy. Until more is known, black root should not be used during pregnancy.

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

Everything else you take

See Every Supplement That Interacts With Loncastuximab Tesirine-Lpyl

This page covers Black Root only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Loncastuximab Tesirine-Lpyl page lists 37 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: St. John's Wort (major), Bitter Melon (moderate), Black Pepper (moderate), Bulbine Natalensis (moderate) and Cannabis (moderate).

By severity: 1 major · 28 moderate · 8 minor.

From our pharmacist’s overview on the Loncastuximab Tesirine-Lpyl page

“Loncastuximab tesirine (Zynlonta) is an infusion treatment for lymphoma that has come back or stopped responding, so I treat anything that can shift its levels as a real safety question. All 37 ingredients on file interact through the same doorway, a transporter called P-glycoprotein that moves drugs across cell membranes.”

Reviewed by 2 · Jul 18, 2026

Open the Loncastuximab Tesirine-Lpyl interaction page

One more smart check

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

We hold 41 real supplement products containing Black Root, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Black Root. Even though Black Root itself has no known interaction with Loncastuximab Tesirine-Lpyl, 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 Black Root and Loncastuximab Tesirine-Lpyl 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 Black Root

Top half

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

29 days ago today

Medication Loncastuximab Tesirine-Lpyl

Top 25%

#576 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 Black Root reference on this page ↓
Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Black Root and Loncastuximab Tesirine-Lpyl 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 Dr. Brian Staiger, PharmD, BCPS.

Supplement

About Black Root

What is Black Root?

Constipation
Liver and gallbladder complaints
Digestive upset
Stimulating bile flow

Black Root is a traditional North American herb that was historically used as a strong laxative and to support digestion and liver function. There is very little modern scientific evidence to support these uses, and the fresh root can be toxic, so it should be used cautiously, if at all, and never during pregnancy or breastfeeding.

Veronicastrum virginicum · Plantaginaceae · Dried root and rhizome · Dried root, tincture, liquid extract, capsules, tea

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

Black Root: dosing

There is no established, standardized dose for Black Root, and modern dosing guidelines are lacking. Traditional preparations used the dried, aged root rather than the fresh root.Because of the risk of toxicity and strong laxative effects, you should not guess at a dose.

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

Read the full Black Root monograph & all interactions

Medication

About Loncastuximab Tesirine-lpyl Injection

What Is Loncastuximab Tesirine-lpyl Injection Used For?

Brand name: Zynlontab

Loncastuximab tesirine-lpyl injection is used to treat a certain type of non-Hodgkin's lymphoma (NHL; a type of cancer that begins in a type of white blood cells that normally fights infection) that did not respond to or has returned after treatment with at least two other cancer treatments. Loncastuximab tesirine-lpyl is in a class of medications called antibody-drug conjugates. It works by killing cancer cells.

See full Loncastuximab Tesirine-lpyl Injection drug information

Keep checking

Other Drugs & Black Root

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

0Major

78Moderate

0Minor

2,751No known interaction

78 Moderate 2,751 No interaction

Moderate

78 interactions

Showing 60 of 78 moderate interactions — see all 78 on the Black Root page.

No interaction 2,751 drugs checked — show the list

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

Showing the 60 most looked-up of 2,751 medications checked with no known interaction — see the full Black Root list.

See the full Black Root interactions page

See every supplement checked against Loncastuximab Tesirine-Lpyl, ranked by severity

Evidence & sources

Black Root References

The 2 references that drive our Black Root 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.

Brinker F. Herb Contraindications and Drug Interactions. 2nd ed. Sandy, OR: Eclectic Medical Publications, 1998.
Fetrow CW, Avila JR. Professional's Handbook of Complementary & Alternative Medicines. 1st ed. Springhouse, PA: Springhouse Corp., 1999.

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 Black Root and Loncastuximab Tesirine-Lpyl Together: Common Questions

Is it safe to take Black Root with Loncastuximab Tesirine-Lpyl?

We do not list a known interaction between Black Root and Loncastuximab Tesirine-Lpyl. 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.

How was the Black Root and Loncastuximab Tesirine-Lpyl combination checked?

Interactions in our licensed database are recorded against drug classes. Loncastuximab Tesirine-Lpyl is filed under 1 classification, and Black Root has documented interactions with 3 drug classes — none of Loncastuximab Tesirine-Lpyl's classifications are among them. A medication can belong to classes beyond those recorded in our dataset, so this describes how the check was run rather than guaranteeing safety.

Does Black Root interact with any other medications?

Yes. Black Root has 78 documented drug interactions in our database — Loncastuximab Tesirine-Lpyl is simply not one of them. If you take anything else, it is worth checking each one; they are all listed on this page.

Does Loncastuximab Tesirine-Lpyl interact with any supplements?

Yes. Loncastuximab Tesirine-Lpyl has documented interactions with 37 supplements in our database — Black Root is not one of them. The Loncastuximab Tesirine-Lpyl 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

Black Root monograph Uses, safety profile, and every drug interaction in one place Loncastuximab Tesirine-lpyl Injection drug information The full plain-English guide to this medication Loncastuximab Tesirine-Lpyl supplement interactions Every supplement checked against Loncastuximab Tesirine-Lpyl, 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 Loncastuximab Tesirine-Lpyl and Black Root?

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.