As some of you know, I was on 30 mg Lisinopril for four years while caring for my husband 24/7. Several months after his death, I was able to decrease that to 10 mg. I tried at that time to go off the meds completely, but my systolic was still running in the low 140s unmedicated, so I stayed on the 10 mg for another year. This past January I was able to get off the meds altogether, and my BP is now running about 126/75.
I believe the difference was likely due to change in diet. Though I ate a fair number of fruit-vegetable servings before, I now tend to eat far more, usually having 16-24 ounces of fruit or vegetable juice a day and most days a giant salad for lunch, usually with a spinach base and including some combination of things like tomatoes, carrots, celery, cauliflower, broccoli, zucchini, asparagus, onions, bell peppers, and garbanzo beans. I also have vegetables for dinner and about half the time, even for breakfast. (Yes, a large serving of homemade salsa on my scrambled eggs. Yummy!)
The only other thing I can think of that might have contributed to lowering my pressure in that time is that I started taking my magnesium supplement more regularly and during part of the time increased the amount from 250 mg to 500 mg daily. Magnesium is one of the nutrients which help keep blood pressure under control, and I had symptoms (nocturnal leg cramps and restless legs syndrome) which are frequently relieved by extra magnesium, so I likely need more than average.
We've recently had quite a discussion about magnesium, including its role relieving anxiety, on another thread; so rather than get into another discussion of that here, you might want to refer to: