In an article published in the British Journal of Nutrition, a total of 36 people with high blood pressure were randomized to placebo or grape seed extract pills. Subjects consumed a juice containing 0 mg or 300 mg/d GSE (150 mg twice daily) for 6 weeks. At the end of the study, those who took GSE were found to have reduced systolic BP by 5 % and diastolic BP by 4 %. Four weeks after the pills were stopped, blood pressure returned to baseline values. Read more about grape seed.
There are many natural supplements and lifestyle factors that influence blood pressure. In my opinion doctors are too quick to rely on medications since they do not know much about the natural alternatives. Unfortunately, many people have to rely on themselves to read and learn on their own to find out whether there are safer ways to reduce blood pressure without drugs.