From an episode of South Park...
Pharmacist: (gives some Ritalin to Mrs. McKormick.) There's your perscription, Miss McKormick! A hundred dollars worth of Ritalin!

Mrs. McKormick: Then he won't have Attention Deficit Disorder anymore?

Pharmacist: We can only hope so. Next! (Pan to the middle of the line where Shiela Broflovski and Sharon Marsh are standing with their kids.)

Sharon: Oh, hi, Shiela!

Shiela: Sharon! Your son has Attention Deficit Disorder too?

Sharon: Yes! I should've known! It all makes sense now! I could never get Stanley to pay attention when his grandfather told him stories about the thirties!

Shiela: I know what you mean! Kyle gets so hyper! Sometimes he runs around and screams like a little eight-year-old!

Kyle: I am eight.