There is a gradual increase in risk as the numbers go up, starting from about 115/75. The point at which medication is usually given is at a systolic of at least 140 OR a diastolic of at least 90. If you are averaging 135/90, I would try eating more vegetables, which often brings BP down. (Celery is supposed to be one of the best.) If you aren't eating too many now, try doubling your vegetable intake for a while and see what happens. If you stick to the low calorie veggies (broccoli, cauliflower, spinach, carrots, celery, eggplant, summer squash, peppers, onions, etc.), you are not likely to gain weight, as people eating that much fiber typically feel full sooner and thus just don't consume as many total calories. Just don't smother them in high-fat salad dressings or sauces! Also, regular cardio exercise usually brings BP down and for some people deep breathing exercises.
If you aren't able to bring your average diastolic down below 90 with lifestyle changes, I recommend going back to the doctor and ask for a change in medication. There are many different meds and the side effects may be different. You just may need to try several before you find one that works for you with a minimum of side effects. I was lucky - I have no side effects of which I'm aware from the first one I tried.
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