Side effects can include daytime sleepiness, cognitive impairment, and dependence.

Environmental sources include overstimulation, radical changes in lifestyle, and sensory impairment.

Symptoms of eye invasion include visual impairment, pain, keratitis, and retinal edema.

Findings in these patients include hypotension, hypoxemia, seizures, and impairment of cognitive ability.

Symptoms of poisoning in humans include reversible impairment of kidney function.

Health effects include sensory impairment, dermatitis, memory loss, and muscle weakness.

The next two levels include severe impairment and total paralysis, respectively.

Symptoms typically include sensory impairment (vision, hearing, speech), disturbed sensation and a lack of coordination.

Side effects may include drowsiness, muscle weakness, mental impairment, or dependence.

This can include impairment of cognitive function, motor control, or even consciousness.