Systemic conditions
Intoxications with diminished alertness
Ethanol
Sedative/hypnotic toxicity
Toxic alcohols
GHB
Benzodiazepine toxicity
TCA toxicity
Antipsychotic toxicity
Inhalant abuse, hydrocarbon toxicity
Pentobarbital
Chloral hydrate toxicity
Marijuana toxicity
Phencyclidine toxicity
Intoxications with relatively preserved alertness
Phenytoin, fosphenytoin, Keppra
Carbamazepine, oxcarbazepine
Valproic acid
Lead, organic mercurials
Carbon monoxide
Acute radiation syndrome
Lithium toxicity
Mushroom toxicity
Lacosamide
Arsenic toxicity
Gabapentin
Marijuana toxicity
Phencyclidine toxicity
Lindane
Vitamin A toxicity
Other metabolic disorders
Hyponatremia
Hypernatremia
Hypomagnesemia
Inborn errors of metabolism
Wernicke disease
Vitamin B7 deficiency
Vitamin E deficiency
Disorders predominantly of the nervous system
Conditions affecting predominantly one region of the CNS
Hemorrhage, vertebral and carotid artery dissection
Infarction
Lateral medullary syndrome
Degenerative changes
Abscess
Brain tumor
Head trauma
Hydrocephalus, normal pressure hydrocephalus, VP shunt malfunction
Parkinson's disease
Prion disease
Heat stroke
Leukostasis and hyperleukocytosis
Cervical spondylosis
Posterior column disorders
Conditions affecting predominantly the peripheral nervous system
Peripheral neuropathy
Vestibulopathy (e.g. vestibular neuritis, labyrinthitis)
Guillain-Barre
Miscellaneous
Acute mountain sickness
Syphilis
Tick paralysis
Ciguatera, neurotoxic shellfish poisoning
African trypanosomiasis
Tympanic membrane rupture
Legionella
Paraneoplastic syndromes
Postinfectious cerebellitis (acute cerebellar<unk> 
Post vaccination (varicella)
Vasculitis
Epilepsy
Intoxications with diminished alertness
Ethanol
Sedative/hypnotic toxicity
Toxic alcohols
GHB
Benzodiazepine toxicity
TCA toxicity
Antipsychotic toxicity
Inhalant abuse, hydrocarbon toxicity
Pentobarbital
Chloral hydrate toxicity
Marijuana toxicity
Phencyclidine toxicity
Intoxications with relatively preserved alertness
Phenytoin, fosphenytoin, Keppra
Carbamazepine, oxcarbazepine
Valproic acid
Lead, organic mercurials
Carbon monoxide
Acute radiation syndrome
Lithium toxicity
Mushroom toxicity
Lacosamide
Arsenic toxicity
Gabapentin
Marijuana toxicity
Phencyclidine toxicity
Lindane
Vitamin A toxicity
Other metabolic disorders
Hyponatremia
Hypernatremia
Hypomagnesemia
Inborn errors of metabolism
Wernicke disease
Vitamin B7 deficiency
Vitamin E deficiency
Ethanol
Sedative/hypnotic toxicity
Toxic alcohols
GHB
Benzodiazepine toxicity
TCA toxicity
Antipsychotic toxicity
Inhalant abuse, hydrocarbon toxicity
Pentobarbital
Chloral hydrate toxicity
Marijuana toxicity
Phencyclidine toxicity
Phenytoin, fosphenytoin, Keppra
Carbamazepine, oxcarbazepine
Valproic acid
Lead, organic mercurials
Carbon monoxide
Acute radiation syndrome
Lithium toxicity
Mushroom toxicity
Lacosamide
Arsenic toxicity
Gabapentin
Marijuana toxicity
Phencyclidine toxicity
Lindane
Vitamin A toxicity
Hyponatremia
Hypernatremia
Hypomagnesemia
Inborn errors of metabolism
Wernicke disease
Vitamin B7 deficiency
Vitamin E deficiency
Conditions affecting predominantly one region of the CNS
Hemorrhage, vertebral and carotid artery dissection
Infarction
Lateral medullary syndrome
Degenerative changes
Abscess
Brain tumor
Head trauma
Hydrocephalus, normal pressure hydrocephalus, VP shunt malfunction
Parkinson's disease
Prion disease
Heat stroke
Leukostasis and hyperleukocytosis
Cervical spondylosis
Posterior column disorders
Conditions affecting predominantly the peripheral nervous system
Peripheral neuropathy
Vestibulopathy (e.g. vestibular neuritis, labyrinthitis)
Guillain-Barre
Miscellaneous
Acute mountain sickness
Syphilis
Tick paralysis
Ciguatera, neurotoxic shellfish poisoning
African trypanosomiasis
Tympanic membrane rupture
Legionella
Paraneoplastic syndromes
Postinfectious cerebellitis (acute cerebellar<unk> 
Post vaccination (varicella)
Vasculitis
Epilepsy
Hemorrhage, vertebral and carotid artery dissection
Infarction
Lateral medullary syndrome
Degenerative changes
Abscess
Brain tumor
Head trauma
Hydrocephalus, normal pressure hydrocephalus, VP shunt malfunction
Parkinson's disease
Prion disease
Heat stroke
Leukostasis and hyperleukocytosis
Cervical spondylosis
Posterior column disorders
Degenerative changes
Peripheral neuropathy
Vestibulopathy (e.g. vestibular neuritis, labyrinthitis)
Guillain-Barre
Acute mountain sickness
Syphilis
Tick paralysis
Ciguatera, neurotoxic shellfish poisoning
African trypanosomiasis
Tympanic membrane rupture
Legionella
Paraneoplastic syndromes
Postinfectious cerebellitis (acute cerebellar<unk> 
Post vaccination (varicella)
Vasculitis
Epilepsy
Postinfectious cerebellitis (acute cerebellar<unk>
Ataxia
Systemic conditions
Dysphonia
Intoxications with diminished alertness
Dysphagia
Ethanol
Diplopia
Sedative/hypnotic toxicity