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Adverse Reactions to Fluoroquinolones. An Overview on Mechanistic Aspects

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This review focuses on the most recent research findings on adverse reactions caused by quinolone antibiotics. Reactions of the gastrointestinal tract, the central nervous system (CNS) and the skin are the most often observed adverse effects. Occasionally major events such as phototoxicity, cardiotoxicity, arthropathy and tendinitis occurr, leading to significant tolerability problems.

Over the years, several structure-activity and side-effect relationships have been developed, in an effort to improve overall antimicrobial efficacy while reducing undesiderable side-effects. In this article we review the toxicity of fluoroquinolones, including the newer derivatives such levofloxacin, sparfloxacin, graepafloxacin and the 7-azabicyclo derivatives, trovafloxacin and moxifloxacin. A special attention is given to new data on mechanistic aspects, particularly those regarding CNS effects.

In recent years extensive in vivo and in vitro experiments have been performed in an attempt to explain the neurotoxic effects of quinolones sometimes observed under therapeutic conditions. However, the molecular target or receptor for such effects is still not exactly known. Several mechanisms are thought to be responsible. The involvement of g-aminobutyric acid (GABA) and excitatory aminoacid (EAA) neurotransmission and the kinetics of quinolones distribution in brain tissue are discussed. In addition, quinolones may interact with other drugs theophylline and nonsteroidal antinflammatory drugs (NSAID s )in producing CNS effects

This article provides information about the different mechanisms responsible of quinolones interaction with NSAID s , methylxanthines, warfarin and antiacids.

Keywords: Adverse Reactions; CNS effect; Fluoroquinolones; Mechanistic; aminomethylpyrrolidinyl agents; glutamergic receptors; haemolytic uraemic syndrome; proconvulsant potency

Document Type: Review Article


Publication date: 2001-03-01

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  • Current Medicinal Chemistry covers all the latest and outstanding developments in medicinal chemistry and rational drug design. Each issue contains a series of timely in-depth reviews written by leaders in the field covering a range of the current topics in medicinal chemistry. Current Medicinal Chemistry is an essential journal for every medicinal chemist who wishes to be kept informed and up-to-date with the latest and most important developments.
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