Can cause diarrhea
vomiting
drowsiness
muscular weakness and lack of coordination
tremor
seizures
slurred speech
dizziness
fainting
night blindness
urinary incontinence
restlessness
confusion
stupor
tongue movements
tics
ringing in the ear
hallucinations
poor memory
slowed intellectual functioning
startled response
worsening of organic brain syndrome and myasthenia gravis
abnormal heart rhythm
low blood pressure
poor blood circulation and slow heart rate
loss of appetite
nausea
salivary gland swelling
abdominal pain
excessive salivation
flatulence and indigestion
increased glucose in urine
less urination
increased level of blood sugar with symptoms including increased urination and thirst
blurred vision
dry mouth and impotence/sexual dysfunction.