The Blood Pressure Pill Timing Some Cardiologists Now Recommend

A growing debate in cardiology is focusing on whether the time of day matters for antihypertensive drugs. Blood pressure typically follows a diurnal pattern—lower at night and rising in the morning—and researchers have explored chronotherapy, the idea that aligning medication timing with circadian rhythms could improve cardiovascular outcomes. The article revisits claims tied to the Hygia Chronotherapy Trial, a multi-center study of 19,084 patients that compared taking all medications at night versus morning, including a Spanish analysis suggesting large reductions in death, heart attack, and stroke. Those findings were later scrutinized due to methodological concerns and data irregularities. It also describes the TIME trial, funded by the British Heart Foundation, which compared morning dosing (6am–10am) with evening dosing (8pm–midnight) in over 21,000 participants.