May mimic alcohol intoxication (slurred speech, diplopia, ataxia, blurred vision), but often patient is disoriented to place and time (unlike alcohol) and may be hallucinating.
Sudden Sniffing Death Syndrome: Sudden and unexpected death may occur at any time (first time use or the 100th time use). Exact mechanism unclear.
Chronic Abuse
Encephalopathy-- seen with repeated high level exposure over years. Characterized by personality change, memory loss, fatigue, depression, loss of interest in daily activities, headache, insomnia, loss of initiative, depression.
Gait disturbances, loss of coordination.
Affects hearing, smell.
Parkinsonism
Visual loss- optic neuropathy
Addictive Properties
Volatile substances of abuse rarely produce physical manifestations of withdrawal. Psychological dependence occurs with chronic use. Tolerance has been noted in many sniffers and may occur as rapidly as three months of weekly usage.