For natural treatments. Depends where you are in the world. Starfruit or "belimbing" gives a fast but short term drop in blood pressure. Ripe fruit will do but the best is the one that is as hard as wood, just developing. Don't juice it as it will make you cough. Slower drop but longer lasting is a "tea" from green leaves of the passion fruit, locals here say the leaves of the purple one is more effective than the regular yellow one.