Hi, I had my portable battery blood pressure machine out today and took a random BP check, Im currently taking Lisinopril for my High BP but today it read 126/103 which is >25 mmhg! An hour later it read 147/110 - now Im slightly worried to say the least. Help. - Alison
Hello! Welcome and thank you for asking on Chat Doctor! Your blood pressure values are really concerning. But these values may be just a normal machine mistake, maybe from the battery or a machine defect. I would recommend checking your blood pressure with another machine and check the batteries. If your blood pressure is still in these values, measured with other machines, you should consult with your GP for a careful physical examination, a resting ECG and some blood lab tests (complete blood count, thyroid hormone levels, kidney and liver function tests, blood electrolytes, fasting glucose, etc.) to exclude other possible secondary causes of high blood pressure. If all the above tests result normal and your blood pressure is high, you should discuss with your doctor to consider the possibility of making some changes to your actual antihypertensive therapy (increase the dose or add other Chat Doctor.  Hope to have been helpful! Best regards, 