What to do about a vitamin a overdose?

Depends: It depends on how much was taken over & over what period of time. Acute overdose will cause blurred & double vision, nausea, vomiting, dizziness, drowsiness & increased intracranial pressure, a dangerous elevation of the brain fluid pressure causing headaches, seizures and even death. Chronic overdose leads to skin cracking, hair loss, light sensitivity, and optic nerve damage from pseudo-tumor.