I was taking lisinopril and having optical migraines, pain behind my left eye, continued high blood pressure and had lost half the vision in my right eye. Went into the hospital bp was 240/138 having tia. After 10 years of fighting the BP problems and going from med to med, I finally figured out my problem was really with Aspartame, the artificial sweetener. Aspartame and MSG are both excitations that do terrible things to your brain. After cutting out diet soda and all other sources of the aspartame, and reading labels and staying away from MSG, and cutting out caffeine. I am off all of my meds and starting to feel normal again. It sure cuts down one the quick things you can eat, but better than being a slave to the BP meds forever. with all their side effects. Search the web for Aspartame side effects. You'll be surprised