Nogle patienter, som pludselig holdt op med at tage XERISTAR, oplevede svimmelhed, træthed, prikkende følelse som når noget sover, søvnforstyrrelse (livagtige drømme, mareridt, søvnløshed), rastløshed eller uro, angst, kvalme eller opkastning, rystelser, hovedpine, irritation, diaré, forøget tendens til at svede eller svimmelhed.
Some patients who stop taking XERISTAR suddenly have had symptoms such as dizziness, fatigue, tingling feelings like pins and needles, sleep disturbances (vivid dreams, nightmares, inability to sleep), feeling restless or agitated, feeling anxious, feeling sick (nausea) or being sick (vomiting), tremor (shakiness), headaches, feeling irritable, diarrhoea, excessive sweating or vertigo.