<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hi, may I answer your health queries right now ? Please type your query here... My blood pressure has been high all day, but it has really spiked since I started laying down to go to sleep. It has gotten up to 193118, but then once I am up for a while, it drops. The last reading was 160100, but now my machine is giving me an error reading. My wife happens to take HCTZ. I am wondering if I should go the ER, take one of her pills, wait it out, etc.  <response>: Hi Thereafter going through your query I understand your concern. I would like to tell you that Blood pressure more than 180120 is an emergency condition but looks like your machine is giving fake readings. Check your BP on different machine and if it is actually more than 180120 then go to ER.Dont take pills until you are sure about high BP as risk of hypotension will there if it is a fake reading. Kind Regards 