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Alcohol Hangover

Reviewed by the Nimbera editorial team · Last updated May 2026

A hangover is a cluster of symptoms - headache, nausea, fatigue, brain fog, and sensitivity to light - that develop after alcohol consumption as blood alcohol levels fall. Inflammation, dehydration, electrolyte loss, and acetaldehyde accumulation are key drivers.

When to see a doctor

Seek emergency care for confusion, seizures, slow or irregular breathing, pale or blue-tinged skin, or if a person cannot be woken - these may indicate alcohol poisoning, not a simple hangover.

Natural remedies · 4

Tap any remedy for the full how-to and citation.

How we rate evidenceâ–¾

Strong - Multiple randomised controlled trials or systematic reviews with consistent positive outcomes.

Moderate - At least one RCT or several high-quality observational studies with plausible mechanisms.

Limited - Small trials, animal studies, or traditional use with limited human clinical evidence.

Sources link directly to PubMed, Cochrane Reviews, or NCCIH.

Prickly Pear Extract (Opuntia ficus-indica)

ingestible
Wiese et al. (n=55 completers) double-blind crossover RCT: OFI extract taken 5 hours before drinking halved the risk of severe hangover (OR=0.38; 95% CI 0.16-0.88; p=0.02); nausea, dry mouth, and anorexia significantly improved (all p<0.05). CRP was 40% higher in placebo arm. PMID 15226168.
$15-$30 per month (or per occasion if used as needed)

Korean Red Ginseng

ingestible
Lee et al. (n=25) randomised crossover RCT: red ginseng anti-hangover drink significantly lowered plasma alcohol at 30 min (p=0.002), 45 min (p=0.016), and 60 min (p=0.009) post-consumption, and reduced hangover severity vs placebo. PMID 24458173.
$20-$50 per month

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

ingestible
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

B-Vitamin Replenishment (B-Complex + Hydration)

ingestible
Thomson (PMID 11304071) review documents that alcohol impairs intestinal thiamine (B1) absorption, depletes hepatic B-vitamin stores, and impairs phosphorylation of B vitamins to active forms. No RCT has tested B-complex specifically for hangover; evidence is mechanistic.
$8-$20 per month for B-complex tablets

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Remedy information is compiled from primary clinical sources including PubMed, the Cochrane Library, and the National Center for Complementary and Integrative Health (NCCIH). Evidence ratings reflect published human trial data at time of writing. This content is for informational purposes only and is not a substitute for professional medical advice. Read our full disclaimer.