Benzodiazepine (Sedative-Hypnotic) Overdose — Pathway

Step-by-step decision

Choose step by step as prompted; reaching an endpoint gives the management recommendation. You can go back a step or restart anytime.

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Full pathway

1. [Decision] Pure BZD or mixed/respiratory depression
   CNS depression — pure BZD, or mixed/with respiratory depression? (Benzodiazepine overdose: drowsiness, dysarthria, ataxia, coma; pure overdose usually preserves respiratory drive and is rarely fatal; marked respiratory depression suggests co-ingested opioid/alcohol or other drugs. First open the airway, monitor.)
   • Respiratory depression / mixed or unknown overdose → Supportive care
   • Pure BZD, iatrogenic, no dependence → Flumazenil may be used cautiously
2. [End] Supportive care
   Respiratory depression or mixed/unknown overdose: mainly supportive — airway protection, oxygen, ventilation if needed, circulatory support, monitor until awake; find and treat co-ingestions (opioids → naloxone, etc.). Generally do not use flumazenil (in mixed overdose/dependence it can precipitate seizures or arrhythmia).
3. [End] Flumazenil may be used cautiously
   Pure BZD, iatrogenic (e.g. after procedural sedation), no dependence and no contraindication: flumazenil may be used cautiously, titrated in small doses to reverse; monitor for re-sedation (flumazenil's half-life is shorter than most BZDs). If a seizure occurs → stop flumazenil, give IV benzodiazepines. Contraindicated with dependence, seizure history, or mixed overdose such as tricyclics. Most patients need only observation (discharge if asymptomatic ≥6 h; intentional overdose needs psychiatric evaluation).

Source guidelines & references

• Flumazenil prescribing information (contraindications and warnings); Medscape benzodiazepine toxicity

This pathway is our own synthesis of the decision logic in the guidelines above (not the guideline verbatim); thresholds and workflows change as guidelines update — in practice follow the latest guideline, your institution's protocol and the individual patient.

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