Hi englishsummerrain: These are very good answers and good food for thought from both WildcatVet and from Janie.. WildcatVet has stated all the documented information that is given to us about these medications. The authors of this information state that the generics are the "equivalent" of the brand names, even to the point that many of the generics are made by the same manufacturers of the brand names.
On the other hand, as Janie has stated, the brand name manufacturers have a life-long patent on the time-release mechanisms of the time-released meds. Therein likes the problem for most of us, unfortunately.
Personally, I have taken multiple generics of many of the antidepressants (one, in particular), until I found the one that would work the best for me. My problem has mainly been the time-release mechanism being inferior to the brand meds. If it dumps too much at one time into your system, or not enough at other times, being inconsistent in releasing it into your blood stream, it can wreak havoc on a person's anxiety level, as well as periodic drowsiness, agitation, irritability, insomnia, etc, to name a few. At least that has been my experience. Not to be discouraging to the person who asked this question, but it is oftentimes a Hit-or-miss situation, to find the generic that can work best for your individual body chemistry.
For an example, I took several generics of Wellbutrin XL and also of Wellbutrin SR. I had really bad reactions to some of them: carb cravings, increased appetite, insomnia, dizziness, drowsiness, agitation, irritability, extreme increased anxiety, stomach distress, constipation, etc etc etc. It was a lengthy process to find the one that worked the best for me. I guess part of the problem is when someone has taken brand name in the past, and because of insurance changes, have to go to a generic after many years, as was my case. Then it becomes really difficult to try to duplicate the relief that I was getting from my brand name antidepressant. With so many generics on the market, it is sometimes necessary to try a few before finding the right fit for you. But it's possible the first one will work for you. It takes at least 4 weeks to find out if one is going to be effective. So it takes time and patience.