We chose to SPANK our kids instead, and save ourselves the money, effort, and poisoning these drugs would have done to them.
And there are much better ways than spanking, now that we understand parent/child psychology better.
http://www.youtube.com/watch?v=8EZwALlaiSk
or
http://ocw.usu.edu/Family__Consumer____Human_Development/oer-power-of-positive-parenting/
or
http://www.amazon.com/The-Power-Positive-Parenting-Wonderful/dp/1567131751
The irony is spanking doesn’t work and it never has. You likely did a lot of other things right and are just attributing it to spanking.