I think the manufacturer of your generic is MaMallinckrodt Pharmaceuticals. I had the same issue with another generic (Sandoz)… it did absolutely nothing. There is a lot of variability among the generics and it’s a real problem. I’ve had good luck with the Teva generic. My pharmacy has put “no Sandoz” in my profile and with some notice will order Teva for me. I hope you’re able to find another generic that works.