, , , , , , , , , , ,


The free blood pressure machine at the drugstore may not be accurate. In fact, the readings can be off by as much as 20 points because the machine may not be calibrated correctly. Also, the cuff is often too large for a woman’s arm. Still, if you use the machine and your results are high – meaning above 140 over 90 – play it safe, and get your blood pressure checked by a medical pro.