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 2 citation rows for the GABA + Ketamine pair, each linking to PubMed by PMID where available. Full sourcing methodology at https://nutristackapp.com/methodology/interactions.

Interaction databaseSupplement × SupplementReviewed May 2026

GABA and Ketamine, a caution.

Q: Can I take GABA and Ketamine together?

Possibly, but with caution. GABA and Ketamine have a documented caution-tier interaction. Supplemental GABA used as a calming or sleep aid may add to ketamine's sedative and dissociative load, deepening drowsiness and impairing coordination and alertness.

Q: How does this affect a NutriStack Stack Score?

-5 to your Stack Score per scored caution row.

Supplemental GABA used as a calming or sleep aid may add to ketamine's sedative and dissociative load, deepening drowsiness and impairing coordination and alertness.

2 primary source citations. Emerging evidence. Last verified May 30, 2026.

Open the interaction checker →Read the methodology

One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
Same shape as the other 1,729 pairs in the public database.

Sourcing standards·Evidence tiers

From the interaction database

What the row says.

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

At a glance

Substances: GABA and Ketamine
Pair type: Caution
Evidence (highest tier): Emerging
Source citations: 2 sources
Stack Score effect: −5 to your Stack Score (per scored caution row).
Scope: Supplement × Supplement
Last verified: May 30, 2026

Caution · Emerging evidence

Caution

What is happening. Supplemental GABA used as a calming or sleep aid may add to ketamine's sedative and dissociative load, deepening drowsiness and impairing coordination and alertness.

Mechanism. GABA supplementation aims to increase inhibitory GABAergic signaling, which can compound the central nervous system depression and sedation associated with ketamine, although orally ingested GABA crosses the blood-brain barrier poorly so the magnitude is uncertain.

Recommendation. Do not combine GABA supplements with ketamine. If ketamine is being used and GABA has also been taken, do not drive or operate machinery and seek medical advice.

Sources (2)

Stack Score

How this pair moves the number.

Effect on the composite score

If both GABA and Ketamine 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 documented at /methodology/stack-score.

Check your full routine

One pair was the worked example. NutriStack runs every pair in your stack at once.

Drop in your supplements and prescriptions and the public database surfaces every interaction, synergy, timing rule, and contraindication, every one linked to its primary source.

Open the interaction checker →Browse the full research index