The devices in the drugstores are for screening purposes only. If you suspect BP, then get recehcked by your local doc. Also, please note. If your BP is normal when "off," and high when "on", you need to lower your AAS dosing. The AAS is the only thing that varies. It is foolish to start taking anti-hypertensives to combat AAS-induced BP. High blood pressure, like high cholesterol and other lousy blood profiles, is a warning sign.