Appropriate lifestyle (dietary, exercise, etc etc) changes, can result in a significant fall in BP over time, and may (only may!) be sufficient - under medical advice of course - to reduce dosage of BP medication. Each change - less Na, sufficient K, the right amount and type of exercise, stopping smoking etc etc - will only have a small effect, of a few mmHg, but together several small improvements can add up to a really significant drop in mmHg. Harder work than just taking meds - but worth it if side effects from the meds are a concern. Most side effects are predicated on dosage, so even if it seems unlikely that lifestyle changes will reduce your BP sufficiently to stop medication, they may well enable you to take a dosage low enough to not cause side effects. As well as improving your health overall!
This matches up with my personal experience.
I had a heart attack (25 years ago now), no prior warning.
But, afterwards high BP was diagnosed, as well a being slightly overweight.
I have an aversion to taking medication, on the basis that all medication has the risk of side effects (or, contra-indications, as I believe the medics call them, just read the slip of paper enclosed with the medication). So, although I did (and still do) take prescribed BP medication, I also discussed with GP, and, embarked on:
- reducing my weight
- increasing my exercise (that its how I got back into cycling)
- improving diet
It appears to have worked for me, my BP is at acceptable levels, weight is stable, and, I am still here, 25 years later (now 75yo).
I did find that my GP was rather surprised, and, at first to go along with my "minimal pills" approach, clearly expecting that I would just take the medication and go away quietly. It did require more effort and determination, on my part (I did/do love chocolate and alcohol), but, I have managed.