question: My dad has high blood pressure he is 75 and the problem is in the winter his blood pressure is controllable with his meds but as soon as summer starts we live in texas so during summer his blood pressure keeps droping low like 62/40 r 90/ 60 if he is moving around it will keep dropping so he has to go lie down and drink water and lay there till it starts going back up but at night he has to take his blood pressuer meds cause it will go up too high at night so we just dont know what to do extre to help him where he dont have to stay in bed most of the day