<s>[INST] My doctor told me that if ever I have another sudden lower blood pressure (feeling faint, nausea etc.) to drink lots of ice cold water and that will help raise it. I have a friend who as high blood pressure and who drinks a lot of iced water...will that be bad for her and increase her blood pressure? [/INST] Hello!Welcome and thank you for asking on HCM!Regarding your concern, I would not recommend drinking cold water or ice cold water for this purpose. There is no clinical evidence to support the benefits of ice water on low blood pressure. It is well known that in low blood pressure it is necessary taking plenty of fluids (water, juices), to stay well hydrated and avoid dehydration, but the normal temperature. Besides, staying at bed, avoiding physical activity and coffee intake can be helpful during these episodes. Hope you will find this answer helpful!Best wishes,Dr. Iliri </s>