Mine blood pressure was always fine until a couple of years ago when it was 145/90 during a DOT physical . I was put on 10 mg Lisinopril and that worked fine (I switched pharmacies when Walgreens started using a supplier in India that was recently approved by FDA ) . My latest physical a month ago showed 142/92 . If this was the first time with this reading they could certify me for a year . But since it's a recertification I only get a 3 month card . My Lisinopril dosage has been doubled to 20 mg . The problem is I need to monitor my BP . I bought a "good" Omron digital monitor . It has software that allows stored readings to be printd out on a graph BUT it is showing constant readings around 145/88 . When I am home my wife takes reading with a stethescope and cuff and gets much lower readings - no higher than 120/75. I can't risk a high reading when I go back for recertification and we know just being in a doctor's office raises your BP .