[tj_at_work]

Is there something (a substance, for example, or a drug, or a procedure (but not a surgical one)) that can cause significant mental retardation in an otherwise healthy adult?If I had wanted to ask my doctor, I wouldn't be here.Why would you post an answer that's not an answer?

[helzyeyah]

I think you should ask your doctor about that.Honestly though, pretty much any kind of drug or alcohol can do that, if consumed in large amounts over a significant amount of time or if someone OD's.

[Bushrod Isbister]

Reality TV?

drug/alcohol abuse, exposure to toxic chemicals, prolonged fever, head injury, brain abcess, anoxia