Herb & supplement monograph

Black Hellebore Drug Interactions, Uses, Safety & More

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS ·Updated July 2026

What is this page for?

First and foremost: how Black Hellebore interacts with medications. The heart of this page is the interaction list — every drug Black Hellebore is known to interact with, and how serious each one is.

But these pages have grown well beyond that into a full monograph — what Black Hellebore is, what people use it for and how strong the evidence is, its safety and side effects, and answers to the questions we’re asked most — written and reviewed by the clinical staff at HelloPharmacist. It’s educational information from our licensed clinical databases, not medical advice, and we don’t sell or endorse products. Our editorial policy

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Reviewed by licensed pharmacists Sourced from Natural Medicines

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Black Hellebore Drug Interactions: The Bottom Line

From the HelloPharmacist Editorial Team · Updated July 2026

Based on the available evidence, Black Hellebore drug interactions carry a moderate level of concern for most people, mainly because this plant naturally contains heart-active compounds similar to some heart medications. Every listed interaction is rated moderate rather than major, and all rest on theoretical reasoning rather than documented human cases.

Interactions deserving the most attention

The clearest concern is with digoxin, since Black Hellebore contains cardiac glycosides that could add to digoxin's effects and raise the risk of toxicity. Combinations that lower potassium deserve similar care, especially potassium-depleting diuretics such as furosemide or hydrochlorothiazide, and overused stimulant laxatives, because low potassium makes glycoside toxicity more likely. Certain antibiotics, including macrolides and tetracyclines, and quinine are flagged for the same theoretical reason.

What the rest of the list means

Although the list of interacting medications looks long, nearly all of it traces back to one shared issue: the glycoside compounds in the plant itself. None of these interactions has been confirmed in human studies, so they represent a predicted risk based on how these compounds work rather than harm that has actually been documented in people.

Check your medications against Black Hellebore

Based on HelloPharmacist’s Black Hellebore interaction data and reviewed under our editorial standards.

Interaction report

Drugs that interact with Black Hellebore

133 medications have a known interaction with Black Hellebore, graded by severity. Select any drug for the full evidence-based detail.

Don’t want to scroll the list? Just ask.

Tell us the medications you take and we’ll check each one against Black Hellebore using our pharmacist-reviewed interaction data.

AI summaries are generated from our Black Hellebore interaction data for education only — always confirm with your pharmacist. How we use AI

2,830 drugs

Read The List Like a Pharmacist

What Severity, Likelihood & Evidence Mean

Severity — How Serious It Can Be

Major. Clinically significant; generally best avoided, or used only under direct professional supervision.
Moderate. May need monitoring, a dose adjustment, or separating the times you take each one.
Minor. Generally not clinically significant, but still worth noting and mentioning to your pharmacist.
No known interaction. Checked against our sources with nothing documented — not the same as proven safety.

Likelihood — How Well It’s Documented

Likely. Well-controlled human studies have demonstrated the likely existence of this interaction
Probable. Interaction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
Possible. Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists
Unlikely. Interaction has been demonstrated in animal or in lab research but has been shown not to occur in humans.

Where This Data Comes From

Interaction records are evidence-graded and sourced from the Natural Medicines database (TRC Healthcare), the same reference used by pharmacists and hospitals.
Each drug listed above links to the full report for that exact Black Hellebore combination — clinical detail, likelihood, evidence level, and citations.
Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

The big picture

The kinds of drugs Black Hellebore affects

Every type of medication (drug category) Black Hellebore is known to interact with. Open any category for the detail — or search your exact drug in the checker above.

All 6 drug categories Black Hellebore interacts with

Digoxin (lanoxin)Diuretic DrugsMacrolide AntibioticsQuinineStimulant LaxativesTetracycline Antibiotics

Digoxin (Lanoxin)

Black hellebore contains cardiac glycosides. Using black hellebore in combination with digoxin might have additive effects and increase the risk of toxicity.