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Intramuscular and oral midazolam. Some factors influencing uptake
Anaesthesia
|December 1, 1983
Abstract:
Intramuscular midazolam is better absorbed than when given orally. Addition of hyaluronidase to the injection significantly increases uptake but causes a high incidence of pain at the injection site. Concurrent administration of oral midazolam and metoclopramide does not increase its uptake.
Insights
Intramuscular midazolam offers better absorption than oral forms. While hyaluronidase boosts uptake, it causes injection site pain; metoclopramide does not enhance oral midazolam absorption.
Area of Science:
- Pharmacology
- Drug Delivery Systems
Background:
- Oral midazolam absorption is generally lower than intramuscular administration.
- Optimizing midazolam bioavailability is crucial for effective sedation and anesthesia.
Purpose of the Study:
- To compare the absorption of intramuscular versus oral midazolam.
- To evaluate the effect of hyaluronidase and metoclopramide on midazolam uptake.
Main Methods:
- Comparative pharmacokinetic analysis of midazolam administered via different routes.
- Assessment of midazolam absorption with and without adjuncts like hyaluronidase and metoclopramide.
Main Results:
- Intramuscular midazolam demonstrated superior absorption compared to oral administration.
- Hyaluronidase significantly enhanced intramuscular midazolam uptake but increased injection site pain.
- Concurrent oral midazolam and metoclopramide did not improve oral drug absorption.
Conclusions:
- Intramuscular midazolam provides more reliable and rapid absorption.
- Hyaluronidase is effective for increasing midazolam uptake but poses a pain-related limitation.
- Metoclopramide is ineffective in enhancing oral midazolam bioavailability.