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Phenazopyridine
General information
Phenazopyridine, an azo dye, is used as a urinary tract analgesic. Although its use is not justified, because of toxicity, and although it was, for example, withdrawn in Greece in 1984, it continues to be used [ , ], and is available over the counter in some countries, for example the USA [ , ].
Organs and systems
Nervous system
Aseptic meningitis was diagnosed in a patient who had three distinct episodes of fever and confusion after taking phenazopyridine [ ].
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