Is it possible to cure ancestral high blood pressure completely?

My father-in-law has ancestral high blood pressure. Also his heart is not healthy, so sometimes it affects the blood pressure to get higher either. Now when something happens or if his blood pressure gets higher he has to take really powerful medicine, which is not good for his other bodies. Even sometimes when his blood pressure gets higher he gets really close to the stroke. I could feel that. So my question is "Is it possible to cure ancestral high blood pressure, also high blood pressure that caused by heart abnormality?"