What kind of interaction is it?

Synergy: a documented combination effect that is stronger or more useful than either substance taken alone.

Is this interaction backed by published research?

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

Supplement × Prescription·a synergy·Emerging evidence

Isoniazid + Milk Thistle

Q: Can I take Isoniazid and Milk Thistle together?

Yes. The combination of Isoniazid and Milk Thistle produces a measurable benefit. Isoniazid carries a recognized risk of hepatotoxicity. Silymarin from milk thistle has been studied as a hepatoprotective adjunct in patients on antitubercular therapy, with some trials suggesting it may reduce markers of liver injury. Evidence is mixed and milk thistle is not a substitute for standard liver monitoring.

Q: How does this affect a NutriStack Stack Score?

+2 to your Stack Score per scored synergy row.

Synergy Emerging evidence

Isoniazid carries a recognized risk of hepatotoxicity. Silymarin from milk thistle has been studied as a hepatoprotective adjunct in patients on antitubercular therapy, with some trials suggesting it may reduce markers of liver injury. Evidence is mixed and milk thistle is not a substitute for standard liver monitoring.

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

Isoniazid and Milk Thistle

Pair type

Synergy

Evidence

Emerging

Source citations

Scope

Supplement × Prescription

Last verified

June 4, 2026

SynergyEmerging evidence

What is happening. Isoniazid carries a recognized risk of hepatotoxicity. Silymarin from milk thistle has been studied as a hepatoprotective adjunct in patients on antitubercular therapy, with some trials suggesting it may reduce markers of liver injury. Evidence is mixed and milk thistle is not a substitute for standard liver monitoring.

Mechanism. Silymarin acts as an antioxidant and free-radical scavenger, may stabilize hepatocyte membranes, and supports glutathione status, which could mitigate oxidative hepatocellular stress associated with isoniazid metabolism.

Recommendation. Milk thistle is not a replacement for routine liver function monitoring during isoniazid therapy. If considering it as a hepatoprotective adjunct, discuss with a clinician. Continue scheduled liver enzyme checks and report symptoms such as nausea, dark urine, jaundice, or right upper abdominal pain promptly.

Stack Score

How it moves the number.

Effect on the composite score

If both Isoniazid and Milk Thistle are in the same stack, this pair applies +2 to your Stack Score (per scored synergy 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

1Luangchosiri C, et al. A double-blinded randomized controlled trial of silymarin for preventing antituberculosis drug-induced liver injury. BMC Complementary and Alternative Medicine. 2015.Needs sourceNo link

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Open the interaction checker → Browse the research index