The only abnormality in my lipid panel is ldl 128. is it time to stop my lipitor (atorvastatin) statin drug. now ?

No: You should remain on Lipitor (atorvastatin) ! New guidelines : get LDL below 100 . Now if you can yourself to your ideal body weight , and can fallow a low fat diet , you can consider stopping Liitor

Depends : It depends on what your LDL was to start and if you have any co-existing vascular disease, diabetes, hypertension, family history or smoking history. There are some numbers that are absolutely too high and meds are needed but many people fall into a grey zone and all variable need to be considered. Diet and exercise should be the first line of intervention for most people.