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[Mezlocillin pharmacokinetics and otitis media (author's transl)]
Abstract:
The results of experimental investigations on the pharmacokinetics of mezlocillin in the perilymph after i.m. injection of 200 mg per kg in the guinea pig are represented graphically. A retention of this new acylureidopenicillin in the inner ear, similar to that of the aminoglycoside antibiotics, is observed. The consideration of the mezlocillin perilymph concentrations that resemble those of gentamicin on a weight for weight basis and the clinically equivalent dosages of these two antibiotics show clearly that the perilymph concentrations of mezlocillin, that may be clinically reached, are many times higher than those of gentamicin. Finally, the prophylactic and therapeutic importance of the mezlocillin perilymph concentrations for infectious inner ear complications caused by the usual bacteria of the acute otitis media or the problem germs of chronic otitis media is discussed.
Insights
Mezlocillin, an acylureidopenicillin, shows significant retention in the inner ear perilymph of guinea pigs. Clinically achievable concentrations in the perilymph are substantially higher than gentamicin, suggesting potential for treating inner ear infections.
Area of Science:
- Pharmacology
- Ototopical Drug Delivery
- Infectious Diseases
Context:
- Inner ear infections, such as otitis media, pose significant therapeutic challenges.
- Aminoglycoside antibiotics are commonly used but have limitations in perilymph penetration.
- Mezlocillin, a novel acylureidopenicillin, was investigated for its pharmacokinetic profile in the inner ear.
Purpose:
- To evaluate the pharmacokinetics of mezlocillin in the perilymph following intramuscular injection in guinea pigs.
- To compare the perilymph concentrations of mezlocillin with those of gentamicin.
- To discuss the potential prophylactic and therapeutic implications of mezlocillin's inner ear distribution.
Summary:
- Experimental investigations demonstrated significant retention of mezlocillin in the guinea pig perilymph after intramuscular administration.
- Mezlocillin exhibited perilymph concentrations comparable to gentamicin on a weight-for-weight basis.
- Clinically relevant dosages indicated that mezlocillin achieves substantially higher perilymph concentrations than gentamicin.
Impact:
- Mezlocillin's enhanced perilymph penetration suggests a promising therapeutic agent for bacterial inner ear infections.
- The findings support the potential use of mezlocillin for prophylaxis and treatment of otitis media caused by common and resistant bacterial pathogens.
- This research opens avenues for developing new otological treatments leveraging acylureidopenicillins.