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Interaction Checker

Check interactions

Add your supplements, foods, meals — and any medications you take — to see how they interact. Findings are grouped by severity: what to avoid, what needs care or timing, and what actually works better together.

Garlic

Add more (1/12)

Avoid

2 · Don't combine without medical guidance
Avoid
GarlicWarfarin (Coumadin)

Increased INR and bleeding risk

Why: Antiplatelet effects + possible CYP2C9 inhibition

Known interaction
Avoid
GarlicSaquinavir

Decreases saquinavir levels by 50%

Why: CYP3A4 induction

Known interaction

Caution

14 · Combine carefully — read the note
Caution
GarlicBlood thinners

Concentrated garlic supplements can add to a blood thinner's effect.

Why: Antiplatelet activity.

Discuss with your prescriber; discontinue before surgery.

Curated
Caution
GarlicAspirin

Increased bleeding risk

Why: Additive antiplatelet effects

Known interaction
Caution
GarlicClopidogrel (Plavix)

Increased bleeding risk

Why: Additive antiplatelet effects

Known interaction
Caution
GarlicHeparin

Increased bleeding risk

Why: Additive anticoagulant effects

Known interaction
Caution
GarlicDirect oral anticoagulants (DOACs)

Possible increased bleeding

Why: Additive effects

Known interaction
Caution
GarlicIbuprofen

Increased GI bleeding risk

Why: Additive antiplatelet effects

Known interaction
Caution
GarlicNaproxen

Increased GI bleeding risk

Why: Additive antiplatelet effects

Known interaction
Caution
GarlicRitonavir

May decrease ritonavir levels

Why: CYP3A4 effects

Known interaction
Caution
GarlicIsoniazid (TB medication)

Garlic may reduce isoniazid absorption

Why: Unknown

Known interaction
Caution
GarlicCyclosporine

May reduce cyclosporine levels

Why: CYP3A4 induction

Known interaction
Caution
GarlicFish oil (high dose)

Additive bleeding risk

Why: Both affect platelet function

Known interaction
Caution
GarlicGinkgo biloba

Additive bleeding risk

Why: Both antiplatelet

Known interaction
Caution
GarlicHIV medications

Garlic: HIV medications

Known interaction
Caution
GarlicCYP3A4 substrates

Garlic: CYP3A4 substrates

Known interaction

Monitor / Timing

6 · Usually fine — mind timing or watch for effects
Monitor / Timing
GarlicACE inhibitors (lisinopril, enalapril)

Possible additive blood pressure lowering

Why: Garlic has mild antihypertensive effect

Known interaction
Monitor / Timing
GarlicCalcium channel blockers

Possible enhanced effect

Why: Additive vasodilation

Known interaction
Monitor / Timing
GarlicInsulin

May enhance blood sugar lowering

Why: Garlic may have mild hypoglycemic effect

Known interaction
Monitor / Timing
GarlicMetformin

Possible additive effect

Why: Garlic may improve insulin sensitivity

Known interaction
Monitor / Timing
GarlicBirth control pills

Theoretical reduced efficacy

Why: CYP3A4 induction (clinical significance unclear)

Known interaction
Monitor / Timing
GarlicVitamin E (high dose)

Possible additive bleeding risk

Why: Both affect coagulation

Known interaction
Not medical advice. This tool surfaces well-established and known interactions from our reference data and curated rules. It is not exhaustive, can’t see your full health picture, and an absence of findings does not mean a combination is safe. Always consult a doctor or pharmacist about your supplements and medications.