Interaction databaseSupplement × SupplementReviewed May 2026

Alcohol and Ketamine, contraindicated.

Combining ketamine with alcohol produces additive central nervous system and respiratory depression, raising the risk of profound sedation, airway compromise, vomiting with aspiration, and loss of consciousness.

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.

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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
Alcohol and Ketamine
Pair type
Contraindicated
Evidence (highest tier)
Strong
Source citations
1 source
Stack Score effect
−25 to your Stack Score (per scored contraindication row).
Scope
Supplement × Supplement
Last verified
May 30, 2026

Contraindicated · Strong evidence

Contraindicated

What is happening. Combining ketamine with alcohol produces additive central nervous system and respiratory depression, raising the risk of profound sedation, airway compromise, vomiting with aspiration, and loss of consciousness.

Mechanism. Both agents depress the central nervous system: alcohol potentiates GABA-A inhibitory tone while ketamine adds NMDA receptor antagonism and dissociation, so the combination compounds sedation and blunts protective airway reflexes.

Recommendation. Do not combine. If both have been taken together and breathing is slow or shallow, consciousness is impaired, or vomiting occurs, seek emergency medical care immediately.

Sources (1)
  1. Kobayashi NHC et al. Ketamine plus Alcohol: What We Know and What We Can Expect about This. Int J Mol Sci. 2022;23(14). PMID 35887148

Stack Score

How this pair moves the number.

Effect on the composite score

If both Alcohol and Ketamine are in the same stack, this pair applies −25 to your Stack Score (per scored contraindication row).

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

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