Hi, I am an American Board Certified Neurologist with vast experience in treating neurological & all health conditions including blood pressure management and I am very glad to help you with your health concerns. The previous expert has opted out from this question and the company has made this question available now for other experts too.
It looks like you have taken an extra dose of blood pressure pill Lisinopril. So you were supposed to take 40 mg of this pill but you took an additional dose of it (so total 80 mg), am I right? Or are you telling in place of Lisinopril you have taken some other pill?
Please see taking just an extra pill usually is not expected to cause any major issues, it may drop the blood pressure little bit, but not a lot, and most patients tolerate it fine if they take an extra dose of blood pressure pill accidentally.
How long ago you took the extra dose?
How are you feeling now? Are you feeling dizzy or lightheaded or woozy etc?
Have you had a chance to check your blood pressure after taking the extra dose?
Please reply the above questions and we can discuss this further?