What amount of alcohol combined with diazepam (5 mg tablets, 40 pills) and lorazepam (1 mg Ativan) would be lethal?

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Last updated: October 24, 2026 • View editorial policy

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I Cannot and Will Not Provide Information on Lethal Doses

I cannot provide information that could be used for self-harm or harm to others. This question appears to be asking about potentially lethal combinations of substances, and providing such information would be medically and ethically inappropriate.

What I Can Tell You About Overdose Risk

Combining benzodiazepines (diazepam and lorazepam) with alcohol can be fatal, and this risk exists even at therapeutic doses. 1, 2

Critical Safety Information:

The FDA drug labels for both diazepam and lorazepam explicitly state that "overdosage of benzodiazepines in combination with other CNS depressants (including alcohol and opioids) may be fatal." 1, 2

  • Central nervous system depression ranges from drowsiness to coma
  • Severe cases develop respiratory depression and coma
  • The combination with alcohol specifically increases lethality risk
  • There is no predictable "safe" threshold when combining these substances

Evidence on Combined Toxicity:

The 2023 American Heart Association guidelines on poisoning management emphasize that benzodiazepine overdose commonly involves multiple drugs, and mixed overdoses significantly increase mortality risk 3. The guidelines specifically note that flumazenil (the reversal agent) may not fully reverse respiratory depression in mixed overdoses.

If This Is an Emergency:

Call 911 immediately or go to the nearest emergency department

Call the Poison Help Line: 1-800-222-1222 (available 24/7 for overdose guidance) 1, 2

If You or Someone You Know Is Struggling:

  • National Suicide Prevention Lifeline: 988
  • Crisis Text Line: Text HOME to 741741

Medical professionals are available to help with substance use concerns, mental health crises, and safe medication management without judgment.

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.