Interactions on record — worth a quick check against your medications. Based on 6 of 7 ingredients. Check your meds →
Dietary supplement

Essigen Combination Ingredients & Drug Interactions

by Genestra Brands

Liquid Category: Botanical
Most serious interaction: Moderate
The interaction bottom line Most serious interaction: Moderate

Essigen Combination is a dietary supplement by Genestra Brands with 7 active ingredients. Its ingredients are commonly taken for skin conditions like acne and eczema, digestive support, diuretic ('detox') and blood purifier.Based on those ingredients, 2,182 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Slippery Elm (Ulmus rubra) bark extract, Red Clover (Trifolium pratense) flower extract, Chinese Rhubarb (Rheum palmatum) root extract. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

HelloPharmacist Scorecard of Essigen Combination by Genestra Brands

Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.

From our pharmacy team — supplement deep dive

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 7 of its 7 active ingredients.
  • No proprietary blends here — you can verify the dose of every single component.

Essigen Combination is a liquid formula with seven active herbal extracts. These include burdock root, sorrel aerial parts, slippery elm bark, Chinese rhubarb root, cleavers aerial parts, red clover flower, and watercress aerial parts.

The product also contains two inactive ingredients: purified water and ethanol.

Does it work?

Moderate evidence
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed

This product doesn't appear to be marketed for a specific use, so we graded its ingredients' overall clinical evidence instead.

Moderate

Some clinical evidence supports its ingredients for:

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.
  • Since the label doesn't commit to one use, we graded the ingredients' overall clinical evidence instead.
  • On file: Menopausal symptoms — rated "Possibly Effective" (Rhubarb) (Natural Medicines).
  • On file: Pancreatitis — rated "Possibly Effective" (Rhubarb) (Natural Medicines).

The evidence supporting these ingredients is limited. Burdock, sorrel, slippery elm, and watercress have insufficient reliable evidence in our data to rate their effectiveness for any condition.

Rhubarb shows possibly effective evidence for pancreatitis and menopausal symptoms, but insufficient evidence for constipation and other uses listed. Red clover similarly shows insufficient evidence for the conditions we hold data on—including menopausal symptoms, osteoporosis, and hair loss.

If you're considering this product for a specific health concern, talk with your doctor or pharmacist about whether the evidence matches what you're hoping to treat.

The evidence, ingredient by ingredient Burdock Sorrel Slippery Elm Rhubarb Red Clover Watercress

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.

Why this rating?
  • We hold adverse-effect (side-effect) data for 6 of the 6 matched ingredients.
  • Pregnancy & breastfeeding safety ratings cover 6 of 6.
  • General safety write-ups exist for 6 of 6.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Most of these herbs are generally well tolerated in food amounts or short-term use, though safety data are often limited. Burdock is likely safe as a food but has few human safety studies; rare allergic reactions including anaphylaxis have been reported, and one case of liver injury was documented (though it's unclear if burdock alone was responsible).

Sorrel contains oxalates and in concentrated doses may pose kidney risk; food amounts are likely fine. Slippery elm may cause contact dermatitis or allergic reactions.

Rhubarb root commonly causes cramping and diarrhea and should not be used long-term; chronic overuse can deplete potassium and harm the kidneys. Red clover is generally well tolerated but may cause nausea, muscle pain, or vaginal spotting.

Watercress in food amounts is safe, but raw wild watercress can carry parasitic flukes that cause liver disease. For pregnancy: burdock and rhubarb should be avoided (possibly unsafe), and red clover is considered possibly unsafe.

Sorrel and slippery elm lack enough data—ask your doctor or pharmacist before use. Watercress is considered likely unsafe in pregnancy.

For breastfeeding: burdock, sorrel, slippery elm, and red clover all lack sufficient safety data and are best avoided; rhubarb should be avoided due to laxative compounds potentially passing into milk. Watercress safety while nursing is not documented in our data.

Side effects, ingredient by ingredient Burdock Sorrel Slippery Elm Rhubarb Red Clover Watercress

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 6 of the 6 matched ingredients can interact with medications — Burdock, Rhubarb, Red Clover, Watercress, Sorrel, among others.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs; immunosuppressants / transplant drugs; heart-rhythm medications; lithium.
  • For scale: 2,183 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

Before taking Essigen Combination, check with your doctor or pharmacist if you take blood thinners or antiplatelet drugs (anticoagulants)—burdock, sorrel, and red clover may theoretically increase bleeding risk. Watercress may blunt warfarin's effects.

Water pills (diuretics), steroids, heart medications like digoxin, and the immunosuppressant cyclosporine all interact with rhubarb; methotrexate, estrogen therapy, and tamoxifen interact with red clover. Watercress may raise lithium and chlorzoxazone levels.

Slippery elm may slow absorption of oral drugs generally. If you take any of these, verify your exact medications with the tool on this page or speak with your pharmacist.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with some supporting evidence behind its ingredients' uses. Moderate medication interactions have been identified, and safety information is well characterized.

This product contains multiple herbs with documented interactions, particularly with blood thinners, water pills, heart and immunosuppressant medications, and methotrexate. If you take any prescription medications, use the checker below to verify your specific drugs before starting.

The evidence for what this formula treats is insufficient in our data, so discuss its purpose and safety with your own doctor or pharmacist before use.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 6 of 7 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Feb 23, 2016.

This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed

At a glance

General information

Key facts about Essigen Combination, straight from the product label.

Brand Genestra Brands
Barcode (UPC) 88319613380
Net contents 2 fl. Oz.; 60 mL
Market status On market
Date entered into DSLD Feb 23, 2016
DSLD ID 56480
Product type Botanical
Supplement form Liquid
Dietary claims / uses All Other
Intended target group(s) Vegan, Vegetarian, Adult (18 - 50 Years), Dairy Free
From the label
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.

Supplement Facts

The label details for Essigen Combination by Genestra Brands, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
1.25 mL
Maximum serving Sizes:
1.25 mL
Servings per container
48
UPC/BARCODE
88319613380
IngredientAmount% DV
Burdock (Arctium lappa) root extract0.5 mL--
Sheep Sorrel (Rumex acetosella) aerial parts extract0.19 mL--
Slippery Elm (Ulmus rubra) bark extract0.13 mL--
Chinese Rhubarb (Rheum palmatum) root extract0.13 mL--
Cleavers (Galium aparine) aerial parts extract0.13 mL--
Red Clover (Trifolium pratense) flower extract0.13 mL--
Watercress (Rorippa nasturtium-aquaticum) aerial parts extract0.06 mL--

Other ingredients: purified Water, Ethanol

Tap any ingredient to jump to its full detail below.

Label statements
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
Suggested/Recommended/Usage/Directions

Recommended Adult Dose: Take 25 drops three to six times daily with warm water, thirty minutes before meals, or as recommended by your healthcare practitioner.

Precautions

Risk Information: If you are pregnant or breastfeeding; if you have abnormal constrictions of the gastrointestinal tract, atonic bowel, inflammatory bowel disease, appendicitis, abdominal pain, hemorrhoids, ulcerative colitis, undiagnosed rectal bleeding, severe dehydration with depleted water or electrolytes, do not use.

Hypersensitivity/allergy to burdock is known to occur; in which case, discontinue use.

Quality Assurance: Safety-sealed for your protection and for product freshness. Do not use if outer seal is missing or broken.

Formulation

Guaranteed to contain no added starch, soy, sodium, sugar, artificial coloring or flavoring, dairy or animal products.

Ideal for vegans.

Storage

Store in a cool, dry place.

General

V1.0 730

FDA Statement of Identity

HERBAL SUPPLEMENT

Seals/Symbols

Seroyal

See for yourself

Essigen Combination by Genestra Brands label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

What’s inside

The Ingredients in Essigen Combination by Genestra Brands

These are the 7 active ingredients this product is made of. Select any to open its full monograph.

Serving size1.25 mL Dosage formLiquid Servings per container48 Amounts shown are per serving.

Most supplement products combine several ingredients, and a medication can interact with the product through any one of them. Each ingredient below shows whether it has known drug interactions.

Burdock (Arctium lappa) root extract

Interacts with
122 drugs
0.5 mL per serving

Burdock is a traditional herb most often used for skin problems and as a so-called 'blood purifier,' but high-quality human studies are lacking and mo...

Burdock (Arctium lappa) root extract monograph & interactions
0.19 mL per serving

Sorrel is a tangy, leafy herb used in cooking and traditional medicine, often for congestion, digestion, and inflammation. Solid human evidence for an...

Sheep Sorrel (Rumex acetosella) aerial parts extract monograph & interactions

Slippery Elm (Ulmus rubra) bark extract

Interacts with
2,022 drugs
0.13 mL per serving

Slippery elm is a traditional herbal remedy made from the inner bark of a North American elm tree, used mainly to soothe sore throats and irritated di...

Slippery Elm (Ulmus rubra) bark extract monograph & interactions
0.13 mL per serving

Rhubarb root has a long history of use as a laxative and in traditional Chinese medicine, and its edible stalks are a common food. Most medicinal clai...

Chinese Rhubarb (Rheum palmatum) root extract monograph & interactions

Cleavers (Galium aparine) aerial parts extract

0.13 mL per serving
0.13 mL per serving

Red clover is a plant rich in isoflavones (plant compounds with weak estrogen-like activity) that is most often used for menopause symptoms like hot f...

Red Clover (Trifolium pratense) flower extract monograph & interactions
0.06 mL per serving

Watercress is a nutrient-rich leafy green that provides vitamins A, C, and K plus minerals and antioxidant plant compounds. Eaten as a food it is gene...

Watercress (Rorippa nasturtium-aquaticum) aerial parts extract monograph & interactions

Other (inactive) ingredients: Purified Water, Ethanol. These complete the product’s ingredient list but are not active constituents.

Interaction report

Essigen Combination by Genestra Brands Drug Interactions

Want to check YOUR meds against Essigen Combination?

Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.

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Each ingredient & the kinds of drugs it affects

For each ingredient in Essigen Combination with known interactions, here are the types of medications they can affect. Open any type for the detail — or search your exact drug in the checker above.

Slippery Elm (Ulmus rubra) bark extract1 drug type · 2,022 drugs

Oral Drugs

Theoretically, slippery elm may slow the absorption and reduce serum levels of oral drugs.
Slippery elm inner bark contains mucilage, which may interfere with the absorption of orally administered drugs.

Likelihood Possible Evidence D

Red Clover (Trifolium pratense) flower extract9 drug types · 867 drugs

Estrogens

Theoretically, concomitant use of large amounts of red clover might interfere with estrogen therapy.
Red clover contains phytoestrogens which might have estrogenic activity in some people. Theoretically, red clover might compete for estrogen receptors and interfere with estrogen-containing drug therapy.

Likelihood Probable Evidence D
Methotrexate (Trexall, Others)

Theoretically, red clover might increase the risk of methotrexate toxicity.
In a case report, a 52-year-old female receiving weekly methotrexate injections for psoriasis developed symptoms of methotrexate toxicity, including severe vomiting and epigastric pain, after three days of taking red clover 430 mg daily. Toxicity resolved after red clover was discontinued. However, no liver function tests or methotrexate levels were reported.

Likelihood Possible Evidence D
Tamoxifen (Nolvadex)

Theoretically, the phytoestrogens in red clover might interfere with tamoxifen.
In vitro and animal research suggests that genistein, a constituent of red clover, might antagonize the antitumor effects of tamoxifen. However, there is some evidence from an animal study that red clover does not reduce the efficacy of tamoxifen. Until more is known, tell patients taking tamoxifen to avoid red clover.

Likelihood Possible Evidence D
Anticoagulant/Antiplatelet Drugs

Although some laboratory research suggests that red clover may have anticoagulant and antiplatelet activity, clinical research has not shown this effect.
In vitro research suggests that genistein in red clover has antiplatelet effects, and historically, red clover was thought to have anticoagulant effects due to its coumarin content. However, some experts state that this is unlikely as most natural coumarins have not been shown to have anticoagulant effects, and their content in red clover is low. Additionally, some clinical research in postmenopausal patients found no effect on coagulation or prothrombin time with the use of red clover flowering tops 378 mg daily for 12 months or red clover isoflavone (Rimostil) 50 mg daily for 2 years.

Likelihood Unlikely Evidence B
Caffeine

Theoretically, soy might reduce the clearance of caffeine; however, a small clinical study found no effect.
Red clover contains genistein. Taking genistein 1 gram daily for 14 days seems to inhibit caffeine clearance and metabolism in healthy females. However, this effect does not seem to occur with the lower amounts of genistein found in red clover. A clinical study in healthy postmenopausal individuals shows that taking red clover capsules standardized to contain 60 mg isoflavones twice daily for 14 days does not affect the pharmacokinetics of caffeine.

Likelihood Unlikely Evidence D
Cytochrome P450 1A2 (Cyp1A2) Substrates

Theoretically, red clover might increase levels of drugs metabolized by CYP1A2; however, a small clinical study found no effect.
In vitro evidence shows that red clover inhibits CYP1A2. However, a clinical study in healthy postmenopausal individuals shows that taking red clover capsules standardized to contain 60 mg isoflavones twice daily for 14 days does not affect the pharmacokinetics of caffeine, a CYP1A2 probe substrate.

Likelihood Unlikely Evidence D
Cytochrome P450 2C19 (Cyp2C19) Substrates

Theoretically, red clover might increase the levels and clinical effects of drugs metabolized by CYP2C19.
In vitro evidence suggests that red clover weakly inhibits CYP2C19. This interaction has not been reported in humans.

Likelihood Unlikely Evidence D
Cytochrome P450 2C9 (Cyp2C9) Substrates

Theoretically, red clover might increase levels of drugs metabolized by CYP2C9; however, a small clinical study found no effect.
In vitro evidence suggests that red clover might inhibit CYP2C9. However, a clinical study in healthy postmenopausal individuals shows that taking red clover capsules standardized to contain 60 mg isoflavones twice daily for 14 days does not affect the pharmacokinetics of tolbutamide, a CYP2C9 probe substrate.

Likelihood Unlikely Evidence D
Cytochrome P450 3A4 (Cyp3A4) Substrates

Theoretically, red clover might increase levels of drugs metabolized by CYP3A4; however, a small clinical study found no effect.
In vitro evidence shows that red clover might inhibit CYP3A4 isoenzymes. However, a clinical study in healthy postmenopausal individuals shows that taking red clover capsules standardized to contain 60 mg isoflavones twice daily for 14 days does not affect the pharmacokinetics of alprazolam, a CYP3A4 probe substrate.

Likelihood Unlikely Evidence B

Chinese Rhubarb (Rheum palmatum) root extract8 drug types · 658 drugs

Corticosteroids

Theoretically, frequent and high doses of rhubarb might increase the risk of hypokalemia when taken with corticosteroids.
Rhubarb has stimulant laxative effects. Overuse of rhubarb might compound corticosteroid-induced potassium loss.

Likelihood Possible Evidence D
Cyclosporine (Neoral, Sandimmune)

Theoretically, taking rhubarb with cyclosporine might reduce cyclosporine levels.
Animal research shows that co-administration of rhubarb decoction 0.25 or 1 gram/kg with cyclosporine 2.5 mg/kg, decreases cyclosporine maximum plasma concentration and overall exposure levels when compared with taking cyclosporine alone. The authors theorize that rhubarb might reduce cyclosporine bioavailability by inducing of P-glycoprotein and/or cytochrome P450 3A4. However, since rhubarb was administered as a single oral dose and enzyme induction usually occurs after multiple doses, it is possible that cyclosporine absorption was actually reduced via rhubarb's stimulant laxative effects. Also, the composition of the rhubarb decoction was not described.

Likelihood Possible Evidence D
Digoxin (Lanoxin)

Theoretically, overuse of rhubarb might increase the risk of adverse effects when taken with digoxin.
Rhubarb has stimulant laxative effects. Overuse of rhubarb might cause potassium depletion, increasing the risk of digoxin toxicity.

Likelihood Possible Evidence D
Diuretic Drugs

Theoretically, frequent and high doses of rhubarb might increase the risk of hypokalemia.
Rhubarb has stimulant laxative effects. Overuse of rhubarb might cause potassium depletion and compound diuretic-induced potassium loss.

Likelihood Possible Evidence D
Hepatotoxic Drugs

Theoretically, concomitant use of rhubarb with potentially hepatotoxic drugs might increase the risk of developing liver damage.
Some animal research suggests that anthraquinones in rhubarb might have hepatotoxic effects. Also, rhubarb use has been linked to at least 24 cases of liver injury, although details on the dose of rhubarb and duration of use in these cases is unclear.

Likelihood Possible Evidence D
Nephrotoxic Drugs

Theoretically, long-term use of anthraquinones from rhubarb might increase the risk of nephrotoxicity when used with nephrotoxic drugs.
The anthraquinone constituents of rhubarb have been shown to induce nephrotoxicity in animal research. Additionally, in a case report, a 23-year old female presented with kidney failure after taking 6 tablets of a proprietary slimming agent (found to contain the anthraquinones emodin and aloe-emodin from rhubarb) daily for 6 weeks and then adding diclofenac 25 mg 4 times daily for 2 days. The authors postulate that the anthraquinone constituents of rhubarb contributed to the renal dysfunction, and the addition of diclofenac, a nephrotoxic drug, led to renal failure. Until more is known, advise patients to avoid taking rhubarb if they are taking other potentially nephrotoxic drugs.

Likelihood Possible Evidence D
Stimulant Laxatives

Theoretically, rhubarb might increase the risk for fluid and electrolyte loss when taken with other stimulant laxatives.
Rhubarb has stimulant laxative effects. Concomitant use with stimulant laxatives might compound fluid and electrolyte loss.

Likelihood Possible Evidence D
Warfarin (Coumadin)

Theoretically, excessive use of rhubarb might increase the risk of bleeding when taken with warfarin.
Rhubarb has stimulant laxative effects and can cause diarrhea. Diarrhea can increase the effects of warfarin, increase international normalized ratio (INR), and increase the risk of bleeding. Advise patients who take warfarin not to take excessive amounts of rhubarb.

Likelihood Possible Evidence D

Sheep Sorrel (Rumex acetosella) aerial parts extract3 drug types · 169 drugs

Anticoagulant/Antiplatelet Drugs

Theoretically, sorrel might cause additive effects and side effects when used with anticoagulant or antiplatelet drugs.
In vitro, sorrel has been shown to inhibit platelet aggregation. However, this effect has not been reported in humans.

Likelihood Possible Evidence D
Fexofenadine (Allegra)

Sorrel might reduce the effectiveness of fexofenadine by reducing its absorption from the gut.
In vitro research shows that an ethanol extract of sorrel inhibits organic anion-transporting polypeptide 1A2 (OATP1A2), which transports fexofenadine from the intestine into cells. In rats, concomitant administration of sorrel extract with fexofenadine reduces oral absorption of fexofenadine and the area under the plasma concentration-time curve (AUC).

Likelihood Likely Evidence D
Organic Anion-Transporting Polypeptide Substrates (Oatp)

Sorrel might reduce the effectiveness of OATP substrates by reducing their absorption from the gut.
In vitro research shows that sorrel inhibits OATP1A2. Theoretically it may inhibit other OATPs. The OATPs are expressed in the small intestine and liver and transport drugs into cells. Inhibition of OATP may reduce the bioavailability of oral drugs that are substrates of OATP.

Likelihood Possible Evidence D

Burdock (Arctium lappa) root extract1 drug type · 122 drugs

Anticoagulant/Antiplatelet Drugs

Theoretically, taking burdock with anticoagulant or antiplatelet drugs might increase the risk of bleeding.

In vitro research shows that lignans from burdock reduce rabbit platelet aggregation by inhibiting platelet activating factor. This interaction has not been reported in humans.

Likelihood Possible Evidence D

Watercress (Rorippa nasturtium-aquaticum) aerial parts extract3 drug types · 6 drugs

Chlorzoxazone (Parafon Forte, Paraflex)

Watercress might reduce the metabolism of chlorzoxazone and increase its effects and side effects. Clinical research in healthy volunteers shows that a single ingestion of watercress 50 grams increases the chlorzoxazone plasma concentration-time curve by about 56% and increases its half-life by about 53%.

Likelihood Probable Evidence B
Lithium

Watercress is thought to have diuretic properties. Theoretically, due to these potential diuretic effects, watercress might reduce excretion and increase levels of lithium.

Likelihood Probable Evidence D
Warfarin (Coumadin)

Watercress contains vitamin K. Consuming large amounts of watercress might antagonize the anticoagulant effects of warfarin.

Likelihood Possible Evidence B
The maker

Brand information

Manufacturer and brand details for Essigen Combination, from the product label.

Genestra Brands

Name
Seroyal USA
City
Pittsburgh
State
PA
ZipCode
15275
Phone Number
1-888-737-6925
Web Address
seroyal.com
Pharmacist Counseling Corner

Essigen Combination by Genestra Brands: Common Questions

Does Essigen Combination by Genestra Brands interact with any medications?
Yes. Based on its ingredients, Essigen Combination has a known interaction with 2,182 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Essigen Combination contains 7 active ingredients, and an interaction can come from any of them. We check every ingredient, combine the results into one list per medication, and show which ingredient and mechanism is responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Can I take this if I'm pregnant or breastfeeding?
No—the data advise against it. Burdock and rhubarb may stimulate the uterus; red clover and watercress are considered possibly or likely unsafe in pregnancy. For breastfeeding, burdock, sorrel, slippery elm, and red clover lack enough safety data to recommend them. Discuss this product with your doctor or midwife if you're pregnant or nursing.
What is burdock root supposed to do?
Our data don't have strong evidence that burdock works for any specific condition—the evidence is rated insufficient for acne, aging skin, breast cancer, colds, and eczema. It has a long history of use in traditional herbalism, but modern research backing its benefits is limited.
Is rhubarb safe to use long-term?
No. Rhubarb root commonly causes cramping and diarrhea and shouldn't be used long-term. Chronic overuse can deplete potassium and damage the kidneys. Use only occasionally and in modest amounts, and avoid it altogether if you take water pills, steroids, heart medications, or blood thinners.
What does red clover do?
Red clover shows possibly effective evidence in our data for menopausal symptoms, but the evidence for other uses—including osteoporosis, hair loss, and arthritis—is insufficient. Since it acts like estrogen, it shouldn't be used with estrogen therapy, tamoxifen, or methotrexate.
Does watercress interact with anything?
Yes. Watercress may increase lithium levels, raise chlorzoxazone (a muscle relaxant) levels and side effects, and counteract warfarin's blood-thinning action because of its vitamin K content. Check with your pharmacist if you take any of these.
What adverse effects are most common?
Rhubarb most often causes cramping, diarrhea, nausea, and vomiting. Red clover may cause nausea, muscle pain, or vaginal spotting. Sorrel in combination with other herbs has caused nausea and an unpleasant aftertaste. Allergic reactions, including contact dermatitis, are possible with burdock, slippery elm, and watercress.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

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Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.

Essigen Combination label
Go deeper

The Full Monographs Behind Essigen Combination’s Ingredients

Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.

Herb & supplement monograph

Burdock

Interacts with 122 drugs

Burdock is a traditional herb most often used for skin problems and as a so-called 'blood purifier,' but high-quality human studies are lacking and most claims are not well proven. It is wid...

Read the full Burdock monograph →
Herb & supplement monograph

Sorrel

Interacts with 169 drugs

Sorrel is a tangy, leafy herb used in cooking and traditional medicine, often for congestion, digestion, and inflammation. Solid human evidence for any health benefit is limited, and its hig...

Read the full Sorrel monograph →
Herb & supplement monograph

Slippery Elm

Interacts with 2,022 drugs

Slippery elm is a traditional herbal remedy made from the inner bark of a North American elm tree, used mainly to soothe sore throats and irritated digestive tracts. Its mucilage can coat an...

Read the full Slippery Elm monograph →
Herb & supplement monograph

Rhubarb

Interacts with 658 drugs

Rhubarb root has a long history of use as a laxative and in traditional Chinese medicine, and its edible stalks are a common food. Most medicinal claims are backed by limited or low-quality...

Read the full Rhubarb monograph →
Herb & supplement monograph

Red Clover

Interacts with 867 drugs

Red clover is a plant rich in isoflavones (plant compounds with weak estrogen-like activity) that is most often used for menopause symptoms like hot flashes. The evidence is mixed and genera...

Read the full Red Clover monograph →
Herb & supplement monograph

Watercress

Interacts with 6 drugs

Watercress is a nutrient-rich leafy green that provides vitamins A, C, and K plus minerals and antioxidant plant compounds. Eaten as a food it is generally safe and healthy for most people,...

Read the full Watercress monograph →
Sources

Sources & How We Checked

Essigen Combination's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

The 100 references behind this product’s interaction data

Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.

Burdock 11 references
  1. Iwakami S, Wu JB, Ebizuka Y, Sankawa U. Platelet activating factor (PAF) antagonists contained in medicinal plants: lignans and sesquiterpenes. Chem Pharm Bull (Tokyo) 1992;40:1196-8. PubMed
  2. Sasaki Y, Kimura Y, Tsunoda T, Tagami H. Anaphylaxis due to burdock. Int J Dermatol 2003;42:472-3. PubMed
  3. Rhoads PM, Tong TG, Banner W Jr, Anderson R. Anticholinergic poisonings associated with commercial burdock root tea. J Toxicol Clin Toxicol 1984-85;22:581-4. PubMed
  4. Rodriguez P, Blanco J, Juste S, et al. Allergic contact dermatitis due to burdock (Arctium lappa). Contact Dermatitis 1995;33:134-5.
  5. Kassler, W. J., Blanc, P., and Greenblatt, R. The use of medicinal herbs by human immunodeficiency virus-infected patients. Arch Intern Med 1991;151(11):2281-2288. DOI
  6. Chan, Y. S., Cheng, L. N., Wu, J. H., Chan, E., Kwan, Y. W., Lee, S. M., Leung, G. P., Yu, P. H., and Chan, S. W. A review of the pharmacological effects of Arctium lappa (burdock). Inflammopharmacology. 2011;19(5):245-254. PubMed
  7. Breed, F. B. and Kuwabara, T. Burdock ophthalmia. Arch Ophthalmol 1966;75(1):16-20.
  8. Bryson, P. D., Watanabe, A. S., Rumack, B. H., and Murphy, R. C. Burdock root tea poisoning. Case report involving a commercial preparation. JAMA 5-19-1978;239(20):2157. DOI
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Sorrel 8 references
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Slippery Elm 3 references
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Rhubarb 20 references
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Red Clover 24 references
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