I have been taking the yellow generic Norco tablet for quite a while. It was giving me some relief. This past week I got my new script for my Norco and we had to go out of town directly after my doctor visit. I had my script filled at a CVS Pharmacy (not my regular pharmacy). They gave me the white generic Norco tablet with 167 on one side and just a line on the other like where you would break it in half. My point is this. It does not give me relief from my pain like the yellow tablet did. Also I find my feet are swelling since I have been taking this script. Now is it a coincidence or do you know if this is one of the side effects? Any help into this matter would be appreciated.