Peridaxon is a drug used to alleviate the symptoms of Irumodic Syndrome. (TNG episode: "All Good Things...") In an alternate 2400, Nog was responsible for administering peridaxon to Jean-Luc Picard to treat the Admiral's deterioration due to Irumodic Syndrome. Without it, Picard was known to call people the names of his dead Enterprise comrades and would be unable to finish his work on Project Phoenix. (DS9 - Millennium novel: The War of the Prophets)