Who should not use Rilutek (riluzole)?

Rilutek (riluzole) "ILUTEK is contraindicated in patients who have a history of severe hypersensitivity reactions to riluzole or any of the tablet components." See: http://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=e49d207d-8e32-4183-94ba-cd264f124090.