I get one at 11am ish and another at 5.00 pm ish, even if i've eaten and they last about 90 minutes, CLKD. I've measured blood sugars (have a monitor) and BP (yet another monitor - Hubby's) and the only thing that shows up untoward is an increased pulse and raised dist. BP (bottom number), but still within normal range. My BP is always on the low side of normal. xxxxx