@burcinc-- I use Exforge (amlodipine and valsartan) 5 mg and there isn't a generic version of it out yet because the company still has the patent. When that expires though, the generic version will probably be out soon and I will make the switch.
From what I understand, the generic versions of amlodipine and its combinations are made by different laboratories. The "recipe" so to speak will not be exactly the same as the brand.
My brother-in-law is a pharmacist though and he tells me that generics work just as well as the brand medications and they are not overpriced like the brand ones. Apparently, when generic versions of drugs come out, the brands tend to lose a lot of money because people prefer the generic.
As far as quality goes, I don't see why the generic would be less quality than the brand. It might be a case of trial and error to see which works better for you but I think you should give the generic a try.
And ask your pharmacist too, they can tell you if they've heard people complaining about the inactive ingredients or additional side effects in generic amlodipines.