Generics Switzerland-based generic drugmaker Actavis Group, now owned by US firm Watson Pharmaceuticals (NYSE: WPI) , says it has received tentative approval from the US Food and Drug Administration for guanfacine extended-release tablets 1mg, 2mg, 3mg and 4mg, a generic equivalent to UK drugmaker Shire's (LSE: SHPGY) Intuniv, used in the treatment of attention-deficit hyperactivity disorder (ADHD). 6 July 2012