if that 6 is a lowercase b (a very angular one the barr labs logo) than your worrys are well founded.
b 974 30 oval orange tablet scored and half scored is
generic adderall (mixed amphetamine salts) 30mg
made by Barr Labs
a schedule II controlled substance
a description and image at http://www.barrproductguide.com/
(just type adderall into product search and chose the 30mg)