The key here is the importance of sleep-time blood pressure, "the most sensitive predictor of a person's risk of death from cardiovascular disease."
Taking blood pressure medicine at night encourages blood pressure to dip at night--like in healthy people. "This effect of the proper timing for dosing seems to be directly related to the documented reduction in cardiovascular events."
The study proves that researchers and physicians need to reevaluate the way hypertension is diagnosed and treated.
"However, those who now take their pills in the morning should not begin taking them at night without their doctor's knowledge."