Interactions on record — worth a quick check against your medications. Based on 4 of 5 ingredients. Check your meds →
Dietary supplement

Garlic Force Ingredients & Drug Interactions

by New Chapter

Garlic Force label
See full label image
Capsule Category: Botanical
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 23, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Garlic Force against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.

Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy

The interaction bottom line Most serious interaction: Moderate

Garlic Force is a dietary supplement by New Chapter with 5 active ingredients. Its ingredients are commonly taken for high blood pressure, high cholesterol, heart health.Based on those ingredients, 1,183 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Ginger Rhizome Supercritical Extract, Garlic Bulb Extract, Aqueous, Clove Flower Bud Supercritical Extract. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Garlic Force by New Chapter

Ask about any prescription or over-the-counter medication and we check it for interactions with Garlic Force by New Chapter — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Garlic Force by New Chapter

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

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Jul 30, 2026

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 5 of its 5 active ingredients.
  • No proprietary blends here — you can verify the dose of every single component.

Garlic Force contains five active ingredients: two garlic extracts (aqueous and supercritical), ginger rhizome supercritical extract, clove flower bud supercritical extract, and oregano leaf supercritical extract. These are blended with inactive ingredients—extra virgin olive oil, hypromellose, yellow beeswax, and candelilla wax—which serve as the capsule material and base.

Garlic and ginger are traditional culinary plants used for digestive and systemic wellness; clove and oregano are aromatic herbs also valued in cooking and traditional use. The supercritical extraction methods concentrate the plant compounds, making the dose higher than you'd get from typical food amounts.

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: Atherosclerosis — rated "Possibly Effective" (Garlic) (Natural Medicines).
  • On file: Nonalcoholic fatty liver disease (NAFLD) — rated "Possibly Effective" (Garlic) (Natural Medicines).
  • On file: Diabetes — rated "Possibly Effective" (Garlic) (Natural Medicines).
  • On file: Hypertension — rated "Possibly Effective" (Garlic) (Natural Medicines).
  • On file: Osteoarthritis — rated "Possibly Effective" (Ginger) (Natural Medicines).

The garlic extracts in this product show possibly effective evidence for periodontitis (gum disease), nonalcoholic fatty liver disease, diabetes, hypertension, and atherosclerosis. Ginger is possibly effective for pregnancy-related nausea and vomiting, dysmenorrhea (period pain), and osteoarthritis, though it shows possibly ineffective evidence for exercise-induced muscle soreness and chemotherapy-related nausea.

Clove's evidence is insufficient to rate it for cough, acute pain, or indigestion. Oregano's evidence is also insufficient for acne, bronchitis, asthma, headache, or upper respiratory infections—meaning the research data we hold does not establish whether it works for these purposes.

The evidence, ingredient by ingredient Garlic Ginger Clove Oregano

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 4 of the 4 matched ingredients.
  • Pregnancy & breastfeeding safety ratings cover 4 of 4.
  • General safety write-ups exist for 4 of 4.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Garlic is generally well tolerated by most people, though the supplement-level doses in this product are less studied than food amounts. The most common side effects are stomach upset, body odor, flatulence, bad breath, and nausea; allergic reactions are possible in sensitive individuals.

Rare serious side effects include increased bleeding risk. Ginger is generally well tolerated in typical amounts; common side effects are stomach discomfort, burping, diarrhea, heartburn, and a peppery mouth irritation—symptoms that may be less likely with capsules than powdered ginger.

Doses above 5 grams per day increase side effect risk. Clove is safe as a food spice but concentrated clove oil and large supplement doses can be toxic; it may cause burning, irritation, or rarely severe effects if misused.

Oregano is safe in food amounts, but medicinal-dose safety is less established. All five ingredients carry a caution about increased bleeding risk in the facts.

Side effects, ingredient by ingredient Garlic Ginger Clove Oregano

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?
  • 4 of the 4 matched ingredients can interact with medications — Clove, Garlic, Oregano, Ginger.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs; immunosuppressants / transplant drugs; diabetes medications.
  • For scale: 1,184 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.

Check with your doctor or pharmacist before taking this product if you use blood thinners or antiplatelet drugs (warfarin, aspirin, etc.), blood pressure medications, diabetes drugs, drugs metabolized by liver enzymes (CYP3A4, CYP2E1, CYP2D6, CYP1A2, CYP2C9), protease inhibitors (HIV medications), or tacrolimus (Prograf). Moderate-severity interactions are documented for all of these drug types.

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 may help with blood pressure, blood sugar, or liver health if the research bears out, but it's not for everyone. If you take blood thinners, blood pressure medications, diabetes drugs, HIV protease inhibitors, or any immunosuppressants, you should check your exact medications with your doctor or pharmacist before starting it.

The same goes if you have a bleeding disorder or upcoming surgery. Talk it over with your own healthcare provider to weigh whether it fits your situation.

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

Assessment coverage: 5 of 5 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Jul 18, 2023.

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 Garlic Force, straight from the product label.

Brand New Chapter
Net contents 30 Vegetarian Capsule(s)
Market status On market
Date entered into DSLD Jul 18, 2023
DSLD ID 288199
Product type Botanical
Supplement form Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Vegetarian, Adult (18 - 50 Years), Gluten 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 Garlic Force by New Chapter, 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 Capsule(s)
Maximum serving Sizes:
1 Capsule(s)
Servings per container
30
IngredientAmount% DV
Garlic Bulb Extract, Aqueous160 mg--
Garlic Bulb Supercritical Extract80 mg--
Ginger Rhizome Supercritical Extract8 mg--
Clove Flower Bud Supercritical Extract4 mg--
Oregano Leaf Supercritical Extract3 mg--

Other ingredients: Extra Virgin Olive Oil, Hypromellose, Yellow Beeswax, Candelilla Wax

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

Suggested use: One capsule daily with food. Not recommended for use in children.

Precautions

Not recommended for use in children.

Caution: As with any dietary supplement, you should advise your healthcare professional of the use of this product.

If you are nursing, pregnant, or considering pregnancy, you should consult your healthcare professional prior to using this product. Ask your healthcare professional before use if you are taking blood thinners or planning surgery.

Discontinue use and contact your healthcare professional if you experience a side effect or an allergic reaction.

Do not exceed suggested use.

Keep out of reach of children.

Formulation

Certified gluten free by NSF; 100% vegetarian; no artificial flavors or colors.

Certified gluten free by NSF; 100% vegetarian; no artificial flavors or colors.

Immune & heart support

Non GMO Project Verified Nongmoproject.org NSF Certified Gluten Free

General Statements

Please refer to newchapter.com for more information about this product and its benefits.

The New Chapter money-back guarantee We proudly stand behind every product we make. However, if you are not satisfied, please visit www.newchapter.com/guarantee for refund details. Please recycle this bottle after use.

For questions or comments call 888-874-4461

FDA Disclaimer Statement

This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Brand IP Statement(s)

Copyright 2020 New Chapter, Inc.

New Chapter Est. 1982

Seals/Symbols

Non GMO Project Verified Nongmoproject.org NSF Certified Gluten Free Certified B Corporation

FDA Statement of Identity

Dietary Supplement

Formula

Pure and potent extracts

Is this label outdated? Report a formula or label change and our pharmacy team will review it.

See for yourself

Garlic Force by New Chapter label

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

Garlic Force label

Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.

View the full label (PDF)
What’s inside

The Ingredients in Garlic Force by New Chapter

These are the 5 active ingredients this product is made of. Select any to open its full monograph.

Serving size1 Capsule(s) Dosage formCapsule Servings per container30 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.

Garlic Bulb Extract, Aqueous

Interacts with
989 drugs
160 mg per serving

Garlic is a common food and supplement that may modestly help with blood pressure and cholesterol, though the evidence is mixed and effects are usuall...

Garlic Bulb Extract, Aqueous monograph & interactions

Garlic Bulb Supercritical Extract

Interacts with
989 drugs
80 mg per serving

Garlic is a common food and supplement that may modestly help with blood pressure and cholesterol, though the evidence is mixed and effects are usuall...

Garlic Bulb Supercritical Extract monograph & interactions

Ginger Rhizome Supercritical Extract

Interacts with
1,007 drugs
8 mg per serving

Ginger is a widely used culinary spice with a long history in traditional medicine, and it has the strongest evidence for helping with nausea and vomi...

Ginger Rhizome Supercritical Extract monograph & interactions

Clove Flower Bud Supercritical Extract

Interacts with
977 drugs
4 mg per serving Form: Syzygium aromaticum Flower Bud Supercritical Extract

Clove is a common cooking spice that is also used in traditional medicine, especially as a topical numbing agent for tooth pain thanks to its main com...

Clove Flower Bud Supercritical Extract monograph & interactions

Oregano Leaf Supercritical Extract

Interacts with
208 drugs
3 mg per serving

Oregano is a common Mediterranean cooking herb that is also sold as a concentrated oil or supplement, often standardized for a compound called carvacr...

Oregano Leaf Supercritical Extract monograph & interactions

Other (inactive) ingredients: Extra Virgin Olive Oil, Hypromellose, Yellow Beeswax, Candelilla Wax. These complete the product’s ingredient list but are not active constituents.

Interaction report

Garlic Force by New Chapter Drug Interactions

Want to check YOUR meds against Garlic Force?

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.

 Go to the checker
1,183Drugs
1,156 Moderate 27 Minor

Ingredients driving the most interactions

Ginger Rhizome Supercritical Extract 1,007
Garlic Bulb Extract, Aqueous 989
Clove Flower Bud Supercritical Extract 977
Oregano Leaf Supercritical Extract 208

Individual Drug Interactions

The ingredients in Garlic Force interact with 1,183 drugs. Click any drug to see the details.

4 of the 5 ingredients in Garlic Force interact with drugs. Each result below shows which ingredient is responsible. Ginger Rhizome Supercritical Extract Garlic Bulb Extract, Aqueous Clove Flower Bud Supercritical Extract Oregano Leaf Supercritical Extract

Each ingredient & the kinds of drugs it affects

For each ingredient in Garlic Force 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.

Ginger Rhizome Supercritical Extract14 drug types · 1,007 drugs

Anticoagulant/Antiplatelet Drugs

Ginger may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs. However, research is conflicting.
Laboratory research suggests that ginger inhibits thromboxane synthetase and decreases platelet aggregation. However, this has not been demonstrated unequivocally in humans, with mixed results from clinical trials. Theoretically, excessive amounts of ginger might increase the risk of bleeding when used with anticoagulant/antiplatelet drugs.

Likelihood Possible Evidence B
Antidiabetes Drugs

Theoretically, taking ginger with antidiabetes drugs might increase the risk of hypoglycemia.
Animal and human research suggests that ginger might increase insulin levels and/or decrease blood glucose levels.

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

Ginger might increase or decrease the levels of CYP3A4 substrates.
In vitro research and some case reports suggest that ginger inhibits CYP3A4 activity. Three case reports from the World Health Organization (WHO) adverse drug reaction database describe increased toxicity in patients taking ginger and cancer medications that are CYP3A4 substrates (imatinib, dabrafenib, and crizotinib). However, the causality of this interaction is unclear due to the presence of multiple interacting drugs and routes of administration.
Conversely, other in vitro research suggests that ginger induces CYP3A4 activity, leading to reduced levels of CYP3A4 substrates. However, this interaction has not been reported in humans.

Likelihood Possible Evidence D
Losartan (Cozaar)

Theoretically, ginger might increase levels of losartan and the risk of hypotension.
In animal research, ginger increased the levels and hypotensive effects of a single dose of losartan. It is not clear if ginger alters the concentration or effects of losartan when taken continuously. Additionally, this interaction has not been shown in humans.

Likelihood Possible Evidence D
Nifedipine (Procardia)

Ginger may have antiplatelet effects and increase the risk of bleeding if used with nifedipine.
Clinical research shows that combined treatment with ginger 1 gram plus nifedipine 10 mg significantly inhibits platelet aggregation when compared to nifedipine or ginger alone.

Likelihood Possible Evidence B
P-Glycoprotein Substrates

Ginger might increase the absorption and blood levels of P-glycoprotein (P-gp) substrates.
In vitro research and case reports suggest that ginger inhibits drug efflux by P-gp, potentially increasing absorption and serum levels of P-gp substrates. Two case reports from the World Health Organization (WHO) adverse drug reaction database describe increased toxicity in patients taking ginger and cancer medications that are P-gp substrates (trametinib, crizotinib). However, the causality of this interaction is unclear due to the presence of multiple interacting drugs and routes of administration.

Likelihood Possible Evidence D
Phenprocoumon (Marcoumar, Others)

Ginger might increase the risk of bleeding with phenprocoumon.
Phenprocoumon, a warfarin-related anticoagulant, might increase the international normalized ratio (INR) when taken with ginger. There is one case report of a 76-year-old woman with a stable INR on phenprocoumon that increased to greater than 10 when she began consuming dried ginger and ginger tea.

Likelihood Possible Evidence D
Warfarin (Coumadin)

Ginger might increase the risk of bleeding with warfarin.
Laboratory research suggests that ginger might inhibit thromboxane synthetase and decrease platelet aggregation. In one case report, ginger increased the INR when taken with phenprocoumon, which has similar pharmacological effects as warfarin. In another case report, ginger increased the INR when taken with a combination of warfarin, hydrochlorothiazide, and acetaminophen. A longitudinal analysis suggests that taking ginger increases the risk of bleeding in patients taking warfarin for at least 4 months. However, research in healthy people suggests that ginger has no effect on INR, or the pharmacokinetics or pharmacodynamics of warfarin. Until more is known, monitor INRs closely in patients taking large amounts of ginger.

Likelihood Possible Evidence B
Calcium Channel Blockers

Theoretically, taking ginger with calcium channel blockers might increase the risk of hypotension.
Some animal and in vitro research suggests that ginger has hypotensive and calcium channel-blocking effects. Another animal study shows that concomitant administration of ginger and the calcium channel blocker amlodipine leads to greater reductions in blood pressure when compared with amlodipine alone.

Likelihood Unlikely Evidence D
Cyclosporine (Neoral, Sandimmune)

Theoretically, when taken prior to cyclosporine, ginger might decrease cyclosporine levels.
In an animal model, ginger juice taken 2 hours prior to cyclosporine administration reduced the maximum concentration and area under the curve of cyclosporine by 51% and 40%, respectively. This effect was not observed when ginger juice and cyclosporine were administered at the same time.

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

Theoretically, ginger might increase the levels of CYP1A2 substrates.
In vitro research shows that ginger inhibits CYP1A2 activity. However, this interaction has not been reported in humans.

Likelihood Possible Evidence D
Cytochrome P450 2B6 (Cyp2B6) Substrates

Theoretically, ginger might increase the levels of CYP2B6 substrates.
In vitro research shows that ginger inhibits CYP2B6 activity. However, this interaction has not been reported in humans.

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

Theoretically, ginger might increase the levels of CYP2C9 substrates.
In vitro research shows that ginger inhibits CYP2C9 activity. However, this interaction has not been reported in humans.

Likelihood Possible Evidence D
Metronidazole (Flagyl)

Theoretically, ginger might increase levels of metronidazole.
In an animal model, ginger increased the absorption and plasma half-life of metronidazole. In addition, the elimination rate and clearance of metronidazole was significantly reduced.

Likelihood Possible Evidence D
Ginger Rhizome Supercritical Extract full monograph & interactions

Garlic Bulb Extract, Aqueous12 drug types · 989 drugs

Anticoagulant/Antiplatelet Drugs

Garlic may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Raw garlic and a variety of garlic extracts have antiplatelet activity and can increase prothrombin time.

Likelihood Possible Evidence D
Antidiabetes Drugs

Theoretically, taking garlic with antidiabetes drugs might increase the risk of hypoglycemia.
Clinical research suggests that garlic and garlic extract lower blood glucose levels in healthy and diabetic individuals.

Likelihood Possible Evidence B
Antihypertensive Drugs

Theoretically, taking garlic with antihypertensive drugs might increase the risk of hypotension.
In human research, both garlic and garlic extracts have blood pressure-lowering effects.

Likelihood Possible Evidence D
Atazanavir (Reyataz)

Theoretically, garlic might decrease levels and effects of atazanavir.
In a case report, a patient consuming six stir-fried garlic cloves three times weekly developed suboptimal atazanavir levels and increases in HIV viral load. While the exact cause of this interaction is unclear, there is speculation that garlic might decrease the intestinal absorption of atazanavir or increase its metabolism by inducing cytochrome P450 3A4 (CYP3A4). Until more is known, advise patients not to consume large amounts of garlic while taking atazanavir.

Likelihood Possible Evidence D
Cytochrome P450 2E1 (Cyp2E1) Substrates

Garlic might increase levels of drugs metabolized by CYP2E1.
Clinical research suggests garlic oil can inhibit the activity of CYP2E1 by 39%. Use garlic oil cautiously in patients taking drugs metabolized by these enzymes.

Likelihood Probable Evidence B
Cytochrome P450 3A4 (Cyp3A4) Substrates

Theoretically, garlic products containing allicin might induce intestinal CYP3A4 and inhibit hepatic CYP3A4. This may increase or decrease levels of drugs metabolized by CYP3A4.
Some human research suggests that garlic may induce INTESTINAL CYP3A4, reducing levels of drugs metabolized by this enzyme. This is primarily based on a study showing that taking a specific allicin-containing garlic product (GarliPure Maximum Allicin Formula, Natrol Inc.) twice daily for 3 days reduces saquinavir levels by approximately 50%. It is speculated that the allicin constituent induced CYP3A4 in the gut mucosa. Another study shows that giving docetaxel intravenously, bypassing the CYP3A4 enzymes in the gut mucosa, along with the same specific garlic product for 12 consecutive days, does not affect docetaxel levels. Conversely, there is concern that garlic may inhibit HEPATIC CYP3A4. In a single case report, increased tacrolimus levels and liver injury occurred in a liver transplant patient after taking a specific garlic supplement (Garlicin Cardio, Nature's Way) at up to three times the manufacturer recommended dose for 7 days. Several other studies have evaluated the impact of other garlic formulations on CYP3A4 substrates and have found no effect. Most of the products in these studies provided little or no allicin.

Likelihood Possible Evidence B
Isoniazid

Theoretically, garlic might decrease levels of isoniazid.
Animal research suggests that an aqueous extract of garlic reduces isoniazid levels by about 65%. Garlic reduced the maximum concentration (Cmax) and area under the curve (AUC), but not the half-life, of isoniazid. This suggests that garlic extract might inhibit isoniazid absorption across the intestinal mucosa; however, the exact mechanism of this potential interaction is not known.

Likelihood Possible Evidence D
Protease Inhibitors (Pis)

Theoretically, garlic products containing allicin might decrease levels of PIs.
Protease inhibitors are metabolized by cytochrome P450 3A4 (CYP3A4) isoenzymes. There is concern that garlic products containing allicin might induce intestinal CYP3A4, reducing plasma levels of protease inhibitors. This is primarily based on a study showing that taking a specific garlic product (GarliPure Maximum Allicin Formula, Natrol Inc.) twice daily for 3 days reduces levels of saquinavir, a PI, by approximately 50%. It is speculated that the allicin constituent induce CYP3A4 in the gut mucosa. Several studies have evaluated the impact of other garlic formulations on CYP3A4 substrates and have found no effect. Most of the products in these studies provided little or no allicin.

Likelihood Possible Evidence B
Saquinavir (Fortovase, Invirase)

Theoretically, garlic containing allicin might decrease levels of saquinavir.
Saquinavir is a substrate of cytochrome P450 3A4 (CYP3A4) isoenzymes. There is concern that garlic products containing allicin might induce intestinal CYP3A4 and cause subtherapeutic levels of saquinavir. This is primarily based on a pharmacokinetic study showing that taking a specific garlic product (GarliPure Maximum Allicin Formula, Natrol Inc.) twice daily for 3 days reduces saquinavir levels by approximately 50%. It is speculated that the allicin constituent induces CYP3A4 in the gut mucosa. Several pharmacokinetic studies have evaluated the impact of other garlic formulations on CYP3A4 substrates and have found no effect. Most of the products in these studies provided little or no allicin. Until more is known about this potential interaction, use garlic containing allicin cautiously in patients taking saquinavir.

Likelihood Possible Evidence B
Sofosbuvir (Sovaldi)

Theoretically, taking garlic with sofosbuvir might decrease its effectiveness.
Animal research in rats shows that giving aged garlic extract 120 mg/kg orally daily for 14 days decreases the area under the concentration time curve (AUC) after a single sofosbuvir dose of 40 mg/kg by 36%, increases the clearance by 63%, and decreases the plasma concentrations at 1 and 8 hours by 35% and 58%, respectively. This interaction is hypothesized to be due to induction of intestinal P-glycoprotein expression by garlic.

Likelihood Possible Evidence D
Tacrolimus (Prograf)

Theoretically, garlic might increase levels of tacrolimus.
In one case report, a liver transplant patient taking tacrolimus experienced increased tacrolimus levels and liver injury after taking a specific garlic supplement (Garlicin Cardio, Nature's Way) at up to three times the manufacturer recommended dose for 7 days. It is speculated that garlic inhibited hepatic cytochrome P450 3A4 (CYP3A4), which increased plasma levels of tacrolimus.

Likelihood Possible Evidence B
Warfarin (Coumadin)

Theoretically, garlic might increase the risk of bleeding with warfarin.
Raw garlic and a variety of garlic extracts have antiplatelet activity and can increase prothrombin time. In addition, there is a report of two patients who experienced an increase in a previously stabilized international normalized ratio (INR) with concomitant garlic and warfarin use. However, this report has been subsequently debated due to limited clinical information. Other clinical studies have not identified an effect of garlic on INR, warfarin pharmacokinetics, or bleeding risk. More evidence is needed to determine the safety of using garlic with warfarin.

Likelihood Possible Evidence D
Garlic Bulb Extract, Aqueous full monograph & interactions

Clove Flower Bud Supercritical Extract7 drug types · 977 drugs

Antidiabetes Drugs

Theoretically, concomitant use of clove extracts with antidiabetes drugs might increase the risk of hypoglycemia.
Clinical and laboratory research suggest that polyphenol extracts from clove flower buds might lower blood glucose levels. Dosing adjustments for insulin or oral hypoglycemic agents may be necessary when taken with clove. Monitor blood glucose levels closely.

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

Theoretically, concomitant use of clove may increase levels of drugs metabolized by CYP1A2.
In vitro research shows that eugenol, the principal constituent of clove, can inhibit CYP1A2 in a dose-dependent manner,. This effect has not been reported in humans.

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

Theoretically, concomitant use of clove may increase levels of drugs metabolized by CYP2C9.
In vitro research shows that eugenol, the principal constituent of clove, inhibits CYP2C9 in a dose-dependent manner. This effect has not been reported in humans.

Likelihood Possible Evidence D
Cytochrome P450 2D6 (Cyp2D6) Substrates

Theoretically, concomitant use of clove may increase levels of drugs metabolized by CYP2D6.
In vitro research shows that eugenol, the principal constituent of clove, can inhibit CYP2D6 in a dose-dependent manner. This effect has not been reported in humans.

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

Theoretically, concomitant use of clove may increase levels of drugs metabolized by CYP3A4.
In vitro research shows that eugenol, the principal constituent of clove, can inhibit CYP3A4 in a dose-dependent manner. This effect has not been reported in humans.

Likelihood Possible Evidence D
Anticoagulant/Antiplatelet Drugs

Theoretically, clove oil may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Laboratory research suggests that eugenol, a constituent of clove, has antiplatelet activity. This interaction has not been reported in humans.

Likelihood Unlikely Evidence D
Ibuprofen (Advil, Others)

Theoretically, topical application of clove oil with ibuprofen might increase the absorption and side effects of topical ibuprofen.
Laboratory research shows that topical application of clove oil increases the absorption of topical ibuprofen. This interaction has not been reported in humans.

Likelihood Possible Evidence D
Clove Flower Bud Supercritical Extract full monograph & interactions

Oregano Leaf Supercritical Extract2 drug types · 208 drugs

Anticoagulant/Antiplatelet Drugs

Theoretically, oregano might increase the risk of bleeding when taken with anticoagulant or antiplatelet drugs.
In vitro research shows that aristolochic acid isolated from oregano leaves has antithrombin activity. It has also been reported that oregano oil inhibits arachidonic acid-induced, and ADP-induced, platelet aggregation.

Likelihood Possible Evidence D
Antidiabetes Drugs

Theoretically, oregano might increase the risk for hypoglycemia when taken with antidiabetes drugs.
In vitro and animal research shows that oregano extracts might lower blood glucose levels.

Likelihood Possible Evidence D
Oregano Leaf Supercritical Extract full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Garlic Force, from the product label.

New Chapter

See all New Chapter products
Name
New Chapter, Inc.
Street Address
90 Technology Drive
City
Brattleboro
State
VT
ZipCode
05301
Phone Number
888-874-4461
Web Address
www.newchapter.com/guarantee
Pharmacist Counseling Corner

Garlic Force by New Chapter: Common Questions

Does Garlic Force by New Chapter interact with any medications?
Yes. Based on its ingredients, Garlic Force has a known interaction with 1,183 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Garlic Force contains 5 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 while pregnant?
The data on safety varies by ingredient. Garlic is rated likely safe in pregnancy, though one entry notes possibly unsafe—talk to your doctor about the balance. Ginger is likely safe and is often used for morning sickness, though you should confirm with your provider first. Clove is rated likely safe. Oregano, however, is rated possibly unsafe in pregnancy, so you should avoid supplement doses during pregnancy and stick to food amounts. Check with your own doctor or pharmacist for personalized advice.
What are the most common side effects?
Garlic can cause stomach upset, bad breath, body odor, flatulence, and nausea. Ginger may cause stomach discomfort, burping, diarrhea, or a peppery sensation in your mouth and throat. Clove may cause burning or irritation. Most of these are mild and more likely at higher doses; using capsules may reduce some symptoms compared to powders.
Will this actually help my blood sugar or blood pressure?
The garlic extracts here have possibly effective evidence for both diabetes and hypertension based on human research—meaning the science is promising but not definitive. Ginger shows possibly effective evidence for certain types of pain and nausea. Clove and oregano don't have enough reliable evidence yet to rate them for any condition. These are not replacements for prescription medications; talk to your doctor about whether they could complement your current treatment.
Is this safe to breastfeed on?
Garlic and ginger are rated likely safe during lactation. Clove is rated likely safe. Oregano's lactation safety is not rated in the data we hold. Because this is a concentrated supplement rather than food amounts, check with your doctor or pharmacist before taking it while breastfeeding.
Can I take this if I have a bleeding disorder or am having surgery?
No. Garlic, ginger, clove, and oregano all have documented antiplatelet or blood-thinning effects. Combined, they increase bleeding risk significantly. Tell your surgeon and your doctor before taking this product, and do not start it without their approval if you have a bleeding disorder or upcoming surgery.

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

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Garlic Force label
Go deeper

The Full Monographs Behind Garlic Force’s Ingredients

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

Herb & supplement monograph

Garlic

Interacts with 989 drugs

Garlic is a common food and supplement that may modestly help with blood pressure and cholesterol, though the evidence is mixed and effects are usually small. It is generally safe in food am...

Read the full Garlic monograph → Herb & supplement monograph

Ginger

Interacts with 1,007 drugs

Ginger is a widely used culinary spice with a long history in traditional medicine, and it has the strongest evidence for helping with nausea and vomiting, including from motion sickness, pr...

Read the full Ginger monograph → Herb & supplement monograph

Clove

Interacts with 977 drugs

Clove is a common cooking spice that is also used in traditional medicine, especially as a topical numbing agent for tooth pain thanks to its main compound, eugenol. Food amounts are general...

Read the full Clove monograph → Herb & supplement monograph

Oregano

Interacts with 208 drugs

Oregano is a common Mediterranean cooking herb that is also sold as a concentrated oil or supplement, often standardized for a compound called carvacrol. While lab studies suggest it may hav...

Read the full Oregano monograph →
Sources

Sources & How We Checked

Garlic Force'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 256 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.

Garlic 154 references
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  4. Garty BZ. Garlic burns. Pediatrics 1993;91:658-9.
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  7. Sunter WH. Warfarin and garlic. Pharm J 1991;246:722.
  8. Berthold HK, Sudhop T, von Bergmann K. Effect of a garlic oil preparation on serum lipoproteins and cholesterol metabolism. JAMA 1998;279:1900-2.
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Ginger 64 references
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See these in context on the Ginger monograph →

Clove 26 references
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See these in context on the Clove monograph →

Oregano 12 references
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See these in context on the Oregano monograph →

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DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

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