Related Experiment Videos
Pharmacokinetics of benzydamine
International Journal of Tissue Reactions
|January 1, 1985
Summary
Benzydamine is absorbed well orally, with a half-life of 13 hours. Alternative administration routes show lower systemic absorption, potentially reducing side effects.
Area of Science:
- Pharmacology
- Drug Metabolism
- Clinical Pharmacokinetics
Background:
- Benzydamine exhibits local and systemic activity.
- Understanding benzydamine pharmacokinetics is crucial for clinical application.
Purpose of the Study:
- To investigate the pharmacokinetics of benzydamine following various administration routes.
- To compare systemic absorption and disposition across different delivery methods.
Main Methods:
- Pharmacokinetic analysis of benzydamine after oral, cutaneous, and local administration (mouthwash, vaginal, rectal).
- Measurement of plasma drug concentrations, protein binding, systemic clearance, and volume of distribution.
- Metabolic pathways including oxidation, conjugation, and dealkylation were examined.
Main Results:
- Oral benzydamine is rapidly absorbed, reaching peak plasma concentrations (0.8 µg/ml after 100 mg) with a 13-hour half-life.
- Less than 20% of benzydamine binds to plasma proteins; systemic clearance is 193 ml/min, and volume of distribution is 213 L.
- Cutaneous absorption is slower, yielding lower but more persistent drug levels.
- Local administration routes (mouthwash, vaginal, rectal) demonstrate low systemic absorption compared to oral doses.
Conclusions:
- Benzydamine's pharmacokinetic profile varies significantly with administration route.
- Lower systemic absorption via local routes suggests a reduced risk of systemic side effects.
- Metabolism occurs primarily through oxidation, conjugation, and dealkylation.