I know that some people have high blood pressure since birth. Some suffer from hypertension due to unhealthy lifestyle. There are also meteodependent who have weather changes that cause changes in blood pressure. Hypertension is a very dangerous disease because it can lead to a stroke. Therefore, it's very important to always have pills that lower the pressure at hand, you can read more about them on the Canadian Pharmacy Online portal. If someone has a hypertensive crisis, then you need to call an ambulance, put the person so as to ensure the outflow of blood from the head and give him a pill. After taking the pill after 5-10 minutes, you can start to give him drinks. Herbal teas with mint and lemon balm help a lot.