Sleep deprivation is worse than showing up to work feeling a bit groggy warns a workplace safety expert as KiwiRail moves to ban sleeping medications. 

Its Chief Medical Officer has reviewed Zopiclone and Melatonin and found them incompatible with its safety critical work.  

EMA workplace safety manager Paul Jarvie wants to find out what led to KiwiRail making this decision. 

He told Heather du Plessis-Allan Melatonin isn't a sedative that lasts too long, and will probably be out of a person's system after an eight-hour sleep. 

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