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Updated: May 31, 2026

Novel Methods for Intranasal Administration Under Inhalation Anesthesia to Evaluate Nose-to-Brain Drug Delivery
Published on: November 14, 2018
A randomized clinical trial comparing oral, aerosolized intranasal, and aerosolized buccal midazolam
Eileen J Klein1, Julie C Brown, Ana Kobayashi
1Seattle Children's Hospital, Seattle, WA, USA. eileen.klein@seattlechildrens.org
Insights
Aerosolized buccal midazolam (BM) reduced pediatric laceration repair distress compared to oral BM. Intranasal BM offered faster sedation and better outcomes but was less tolerated.
Area of Science:
- Pediatric Emergency Medicine
- Pharmacology
- Pain Management
Background:
- Sedation is crucial for pediatric laceration repair.
- Oral midazolam is commonly used but can be variably effective.
- Alternative administration routes are needed to improve sedation efficacy and patient experience.
Purpose of the Study:
- To compare the efficacy of aerosolized intranasal midazolam (INM) and aerosolized buccal midazolam (BM) versus oral midazolam (OM) in reducing distress during pediatric laceration repair.
Main Methods:
- Children aged 0.5–7 years requiring nonparenteral sedation were randomized to OM, INM, or BM.
- Patient distress was assessed using the Children's Hospital of Eastern Ontario Pain Score via blinded videotape review.
- Secondary outcomes included activity, sedation adequacy, onset, satisfaction, and adverse events.
Main Results:
- Buccal midazolam significantly reduced distress compared to oral midazolam (P=.04).
- Intranasal midazolam showed a trend towards reduced distress (P=.08).
- Intranasal midazolam resulted in more optimal activity scores, faster onset, and higher parental satisfaction, but was least tolerated during administration.
Conclusions:
- Aerosolized buccal midazolam offers a slight advantage in reducing distress for pediatric laceration repair.
- Intranasal midazolam provides benefits in sedation quality and speed but with poorer initial tolerance.
- Both aerosolized buccal and intranasal midazolam are effective alternatives to oral midazolam for pediatric procedural sedation.
Study Objective:
We determine whether aerosolized intranasal or buccal midazolam reduces the distress of pediatric laceration repair compared with oral midazolam.
Methods:
Children aged 0.5 to 7 years and needing nonparenteral sedation for laceration repair were randomized to receive oral, aerosolized intranasal, or aerosolized buccal midazolam. Patient distress was rated by blinded review of videotapes, using the Children's Hospital of Eastern Ontario Pain Score. Secondary outcomes included activity scores, sedation adequacy, sedation onset, satisfaction, and adverse events.
Results:
For the 169 subjects (median age 3.1 years) evaluated for the primary outcome, we found significantly less distress in the buccal midazolam group compared with the oral route group (P=.04; difference -2; 95% confidence interval -4 to 0) and a corresponding nonsignificant trend for the intranasal route (P=.08; difference -1; 95% confidence interval -3 to 1). Secondary outcomes (177 subjects) favored the intranasal group, including a greater proportion of patients with an optimal activity score (74%), a greater proportion of parents wanting this sedation in the future, and faster sedation onset. Intranasal was the route least tolerated at administration. Adverse events were similar between groups.
Conclusion:
When comparing the administration of midazolam by 3 routes to facilitate pediatric laceration repair, we observed slightly less distress in the aerosolized buccal group. The intranasal route demonstrated a greater proportion of patients with optimal activity scores, greater proportions of parents wanting similar sedation in the future, and faster onset but was also the most poorly tolerated at administration. Aerosolized buccal or intranasal midazolam represents an effective and useful alternative to oral midazolam for sedation for laceration repair.
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