Commonly Used Oral Sedatives
The most commonly used oral sedatives in clinical practice are benzodiazepines (particularly midazolam, diazepam, and triazolam), with midazolam being the most frequently employed agent for procedural sedation. 1
Primary Oral Sedative Classes
Benzodiazepines (First-Line Agents)
The benzodiazepines represent the cornerstone of oral sedation and are explicitly categorized as "sedatives not intended for general anesthesia" in ASA guidelines 1. The most commonly used agents include:
- Midazolam - The most frequently used oral sedative, particularly in pediatric and dental settings 2
- Diazepam (Valium) - Historically popular, though with longer duration of action 1, 3
- Triazolam (Halcion) - Commonly used for insomnia and pre-procedural anxiety 3
- Oxazepam (Serax) - Another benzodiazepine option 3
These agents have undergone years of clinical trials with good safety records and predictable results 4. Benzodiazepines are the safest, most established, and most commonly used route of drug administration for oral sedation 5.
Non-Benzodiazepine Sedatives
The ASA guidelines also identify several other oral sedative classes 1:
- Nitrous oxide (though typically inhaled rather than oral)
- Chloral hydrate - Particularly in pediatric populations
- Barbiturates - Less commonly used now due to longer "hangover" effects 3
- Antihistamines - Used as adjuncts
Newer "Z-Sedatives"
The non-benzodiazepine hypnotics have recently overtaken older benzodiazepines as the most commonly prescribed sleep medications 3:
- Zolpidem (Ambien) - 43 million prescriptions filled in 2005
- Zaleplon (Sonata)
- Eszopiclone (Lunesta)
These are frequently prescribed by dentists for patients with difficulty sleeping before appointments or as procedural sedatives 3.
Combination Approaches
Benzodiazepine-opioid combinations are commonly used but carry increased risk of hypoxemia compared to benzodiazepines alone 6. The evidence shows that combined oral midazolam with intranasal dexmedetomidine provides significantly higher success rates for pediatric sedation compared to midazolam alone 2.
Important Clinical Considerations
Common Pitfall
When using benzodiazepine-opioid combinations, there is a significantly higher risk of hypoxemia requiring supplemental oxygen 6. The guidelines emphasize that appropriate monitoring and reversal agents (flumazenil for benzodiazepines, naloxone for opioids) must be immediately available 6.
Safety Profile
Oral sedation enables treatment of millions of individuals who would otherwise have unmet dental needs, and when used within standards of care, represents a cost-effective service 7. The safety is highly dependent on appropriate drug selection, dosing, and route of administration 8.