Generally, symptoms of CNS toxicity are apparent immediately after inhalation of high toluene concentrations and 30 to 60 minutes after ingestion. Mild CNS effects include headache, lightheadedness, dizziness, confusion, nausea, impaired judgment, impaired gait, and blurred vision. More severe effects include loss of consciousness, coma, and death. Coma may be prolonged, although most victims regain consciousness rapidly after they are removed from exposure.