According to *IMS Health, U.S. sales of antipsychotics (AP) totaled 14.6 billion dollars in 2009.  Antidepressant (AD) sales in the United States amounted to 9.9 billion dollars.  Sales of stimulants (e.g., drugs used to treat the symptoms of childhood hyperactivity and inattention) and anti-seizure drugs accounted for 5.8 billion dollars and 5.3 billion dollars, respectively.
	*IMS Health is a “market intelligence” company.   By using a computerized network which collects data from global healthcare markets, IMS tracks over 70% of the world’s
	pharmaceutical sales transactions and over 90% of the U.S. pharmaceutical sales transactions each day.