El?boro americano
Related Terms
- American false hellebore, American white hellebore, cevadine, corn lily, cryptenamine, cyclopamine, false hellebore, germidine, germitrine, green corn lily, green false hellebore, green hellebore, green veratrum, hellebore, Indian poke, itch weed, jervine, jervine alkaloids, Liliaceae (family), Melanthiaceae (subfamily), muldamine, O-acetyljervine, protoveratrine, poison lily, proveratrine, swamp hellebore, verat-v., veratramine, veratridine, Veratrum viride, Veratrone?, veriloid, Vergitryl?, Vertavis?, white American hellebore.
- Note: Much of the toxicological data in this monograph is based on the European white hellebore (Veratrum album), as both American hellebore and European white hellebore contain jervine alkaloids, the constituents responsible for the plants' toxic cardiovascular effects.
Background
- American hellebore is a perennial plant native to the swampy areas and moist meadows of the eastern and western United States. The root and rhizome of American hellebore has been used historically for fever, pain, and high blood pressure, with a decoction (boiled in water) of the root being used for chronic coughs and constipation. Historically, the whole plant was not routinely used medicinally, only the root and rhizome. Although American hellebore was formerly used as a tea or tincture, potentially toxic and irritating constituents preclude its modern day use by ingestion.
- The toxic effects associated with American hellebore limit its ability to be used as an agent to treat hypertension (high blood pressure), related kidney/heart diseases, and hypertension associated with pre-eclampsia in pregnancy.
- Currently, there is a lack of scientific information regarding the safety or effectiveness of American hellebore as a whole plant, or homeopathically. Most studies have investigated the isolated jervine alkaloids.
Evidence Table
These uses have been tested in humans or animals. Safety and effectiveness have not always been proven. Some of these conditions are potentially serious, and should be evaluated by a qualified healthcare provider. |
GRADE * |
These uses have been tested in humans or animals. Safety and effectiveness have not always been proven. Some of these conditions are potentially serious, and should be evaluated by a qualified healthcare provider. |
GRADE * |
Isolated jervine alkaloids found in American hellebore have been studied for cardiovascular and renal (kidney) dysfunction. Additional study is needed before a firm recommendation can be made.
|
C |
Isolated jervine alkaloids found in American hellebore have been studied for cardiovascular and renal (kidney) dysfunction. Additional study is needed before a firm recommendation can be made.
|
C |
Isolated jervine alkaloids found in American hellebore have been used to treat hypertension, however other herbs and prescription drugs that can treat this condition have fewer toxic side effects. Additional study is needed in this area.
|
C |
Isolated jervine alkaloids found in American hellebore have been used to treat hypertension, however other herbs and prescription drugs that can treat this condition have fewer toxic side effects. Additional study is needed in this area.
|
C |
Isolated jervine alkaloids found in American hellebore may be beneficial for pre-eclampsia/pregnancy-induced hypertension, but other herbs and prescription drugs that can treat this condition have fewer toxic side effects. Additional study is needed in this area.
|
C |
Isolated jervine alkaloids found in American hellebore may be beneficial for pre-eclampsia/pregnancy-induced hypertension, but other herbs and prescription drugs that can treat this condition have fewer toxic side effects. Additional study is needed in this area.
|
C | * Key to grades
A: Strong scientific evidence for this use
B: Good scientific evidence for this use
C: Unclear scientific evidence for this use
D: Fair scientific evidence for this use (it may not work)
F: Strong scientific evidence against this use (it likley does not work)
| * Key to grades
A: Strong scientific evidence for this use
B: Good scientific evidence for this use
C: Unclear scientific evidence for this use
D: Fair scientific evidence for this use (it may not work)
F: Strong scientific evidence against this use (it likley does not work)
| Tradition / Theory
The below uses are based on tradition, scientific theories, or limited research. They often have not been thoroughly tested in humans, and safety and effectiveness have not always been proven. Some of these conditions are potentially serious, and should be evaluated by a qualified healthcare provider. There may be other proposed uses that are not listed below.
Dosing
Adults (18 years and older)
- There is currently a lack of available scientific information about safe or effective dosing of American hellebore in adults. Most preparations used in studies contain isolated jervine alkaloids from American hellebore (Vertavis?, Veratrone?), and no doses of whole American hellebore have been noted.
Safety
The U.S. Food and Drug Administration does not strictly regulate herbs and supplements. There is no guarantee of strength, purity or safety of products, and effects may vary. You should always read product labels. If you have a medical condition, or are taking other drugs, herbs, or supplements, you should speak with a qualified healthcare provider before starting a new therapy. Consult a healthcare provider immediately if you experience side effects.
Interactions
Interactions with Drugs
- The use of American hellebore or its alkaloidal constituents could cause bradycardia (slowed heart rate) and combination with anti-arrhythmic drugs may be unsafe. Caution is advised.
- American hellebore or its alkaloidal constituents may lower blood pressure. Patients taking medications that lower blood pressure (antihypertensives) should consult with a qualified healthcare professional, including a pharmacist.
- American hellebore or its alkaloidal constituents may cause a decrease in glomerular filtration rate (GFR) and effective renal blood flow. Thus, American hellebore may interact with certain medications that increase urine flow (diuretics) such as chlorothiazide (Diuril?). Preparations of American hellebore may also interact with drugs that are excreted through the kidneys or that are potentially toxic to the kidneys.
- Isolated constituents found in American hellebore may have beta-agonist and/or beta-adrenergic blocking activity. Caution is advised in patients with cardiovascular disease or those taking beta-agonist or beta-blocker drugs.
Attribution
-
This information is based on a systematic review of scientific literature edited and peer-reviewed by contributors to the Natural Standard Research Collaboration (www.naturalstandard.com).
Bibliography
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