Abstract
Antibiotics are commonly used systemically in the treatment of sinusitis. However, controlled investigations have shown that there is only slight or doubtful effect. We have, therefore, in connection with a clinical trial of a new antibiotic (pivampicillin, Pondocillin®), determined the tissue levels of ampicil-lin in the mucosa of the sinus. It has been shown that the concentration of ampicillin in nasal polyps following a single dose of pivampicillin 356 mg given orally (mean: 2.11 μg/g) is of the same magnitude as that found in nasal polyps (mean: 2.28 μg/g) and mucosa from the sinus (mean: 1.67 μg/g) after a chemically equivalent single dose of ampicillin sodium 250 mg given intramuscularly. It is therefore probable that the same tissue concentration can be obtained in the mucosa of the sinus following a similar dose of pivampicillin. Some effect of both ampicillin sodium and pivampicillin can thus be expected in the treatment of sinusitis.
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