"my asd  son was put on tenex in kindergarten for aggression/rages. it lessened the behavior problems, but came at a big price. gained 12 lbs within the first month, terrible tummy aches for a couple hours after every dose, night terrors most nights, lost all desire for any kind of physically active play. but kept him on it for 1 1/2 years because i had found nothing else that helped the violent behaviors. after 1 1/2 years the tenex stopped working, even at a higher dose.  slowly weaned him off of it 2 months ago. ever since he he has been out of control, bouncing off the walls non-stop. i&#039;m sorry i ever left him on it in the first place. his psychiatrist confessed this happens to many of his patients who have taken it for a long time."