My father is having high blood pressure for 30 years and managing it with medication and it was all fine. He already has few stents in his arteries to keep them open. Until recently he started feeling weak and strange, his pressure is very low. We told him to take a half tablet and see dr. do you know what is happening to him to feel his way and nothing major happened in his life, all same. he is taking tablets for colesterol, aspirin, blood tiners and high blood tablets...these are regular