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ingestible · for alcohol hangover

N-Acetyl Cysteine (NAC) - Pre-Drinking Precaution

Reviewed by the Nimbera editorial team · Last updated May 2026

Mocelin et al. zebrafish study (PMID 29196951): NAC prevented ethanol-induced oxidative stress and behavioural changes, with authors noting additional studies are warranted to investigate its anecdotal use to prevent hangover. No completed human RCT for hangover prevention exists. Evidence is preclinical only.$10-$20 per month

How to use

If using NAC as a pre-drinking precaution, take 600 mg orally 30-60 minutes before alcohol consumption. Do NOT take during drinking or as a reason to drink more. This is not a proven hangover cure.

How it works

NAC is a precursor to glutathione, the liver's primary antioxidant. Alcohol metabolism generates reactive oxygen species and depletes glutathione. Pre-loading with NAC may help sustain hepatic antioxidant capacity during alcohol processing, potentially reducing oxidative damage and acetaldehyde-related symptoms.

Where to buy

Pharmacies and online. NOW Foods, Jarrow, and Thorne all make 600 mg NAC capsules that are widely available and reasonably priced.

Typical cost: $10-$20 per month

Safety notes

Human evidence for hangover prevention is currently anecdotal only - no completed RCT exists. NAC may cause nausea and should not be used as permission to drink excessively. Consult a doctor if you have asthma (may trigger bronchospasm in some). Avoid combining with nitroglycerin.

Drug & supplement interactions

  • Always tell your doctor or pharmacist about any supplements you take.
  • Interactions can occur with prescription medications, blood thinners, and immunosuppressants.
  • Herbal remedies can affect how the body absorbs or metabolises drugs.
  • Check drugs.com interactions checker before starting.

Clinical source

Mocelin et al., Behavioral and Biochemical Effects of N-Acetylcysteine in Zebrafish Acutely Exposed to Ethanol, Neurochem Res, 2018

This information is compiled from primary clinical literature and is for informational purposes only. It is not a substitute for professional medical advice. Read our full disclaimer.