Apparently not in all cases:

A local Ottawa psychopharmacologist has been doing some large-scale studies of original Luvox versus generics in the treatment/management of obssessive compulsive disorder.

His findings were that at therapeutic levels of the original brand name Luvox, the majority of the subjects showed marked reduction of OCD symptoms.

Of those given the generic "luvox", 50% deteriorated. Of those who were switched from brand name Luvox to the genric, 50% relapsed.