Patients who have not experienced significant alterations in mental status or respiratory difficulty may be discharged. Patients who initially had mild symptoms, but who become asymptomatic during a 6- to 8-hour observation period, may be discharged. These patients should be advised to rest and to seek medical care promptly if symptoms develop or recur (see the Vinyl Chloride—Patient Information Sheet below). Patients who had significant CNS symptoms initially should be observed overnight even if their CNS symptoms appear to resolve.