What kind of interaction is it?

Caution: an interaction that may reduce efficacy or raise side-effect risk and warrants monitoring.

Is this interaction backed by published research?

Yes. NutriStack lists 1 citation row for the Garlic Extract + Perindopril pair, each linking to PubMed by PMID where available. Full sourcing methodology at https://nutristackapp.com/methodology/interactions.

Supplement × Prescription·a caution·Moderate evidence

Garlic Extract + Perindopril

Q: Can I take Garlic Extract and Perindopril together?

Possibly, but with caution. Garlic Extract and Perindopril have a documented caution-tier interaction. Garlic extract has modest blood-pressure-lowering properties demonstrated in meta-analyses. Combined with perindopril, the antihypertensive effects can be additive, which may benefit blood pressure control but can also increase the risk of hypotension, dizziness, and lightheadedness, particularly when standing or in volume-depleted patients.

Q: How does this affect a NutriStack Stack Score?

-5 to your Stack Score per scored caution row.

Caution Moderate evidence

Garlic extract has modest blood-pressure-lowering properties demonstrated in meta-analyses. Combined with perindopril, the antihypertensive effects can be additive, which may benefit blood pressure control but can also increase the risk of hypotension, dizziness, and lightheadedness, particularly when standing or in volume-depleted patients.

Supplement × Prescription

Open the interaction checker → Read the methodology

From the database

What the row says.

Every entry follows the same shape: what is happening, the mechanism, and the recommendation.

Substances

Garlic Extract and Perindopril

Pair type

Caution

Evidence

Moderate

Source citations

Scope

Supplement × Prescription

Last verified

June 4, 2026

CautionModerate evidence

What is happening. Garlic extract has modest blood-pressure-lowering properties demonstrated in meta-analyses. Combined with perindopril, the antihypertensive effects can be additive, which may benefit blood pressure control but can also increase the risk of hypotension, dizziness, and lightheadedness, particularly when standing or in volume-depleted patients.

Mechanism. Garlic-derived organosulfur compounds promote vasodilation partly through hydrogen sulfide and nitric oxide pathways, producing an additive blood-pressure-lowering effect when combined with perindopril's reduction of angiotensin II-mediated vasoconstriction.

Recommendation. Patients combining garlic supplements with perindopril should monitor blood pressure and watch for symptoms of low blood pressure such as dizziness or fainting. Inform the prescriber so that antihypertensive dosing can be adjusted if needed. Rise slowly from sitting or lying positions.

Stack Score

How it moves the number.

Effect on the composite score

If both Garlic Extract and Perindopril are in the same stack, this pair applies −5 to your Stack Score (per scored caution row).

The full algorithm, the clamping rules, and four worked stacks are at /methodology/stack-score.

Sources

Sources, by evidence tier.

Every claim on this page is cited. PMIDs link straight to PubMed.

Reference material

1Ried K. Garlic Lowers Blood Pressure in Hypertensive Individuals. J Nutr. 2016.Needs sourceNo link

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