AngeloFoca, Pristiq not launched, several got Final Approval. I think you mentioned Pristiq as a possibility. I remember Drugs@FDA database shows 5 or 6 companies which have Final Approval from 2015 to 2016. But I do not think any have launched. I would guess there is some sort of patent issue.
Breckenridge Pharma claims to have first-to-file on Pristiq. Their website announced the Final Approval back in 2015. But there has been no news of launching since then. Also, Pristiq is not in their Products listings. So I would have to conclude, that none of the generics which got FDA Final Approval have launched. Maybe FDA should have given Tentative Approval instead.