Mmm...I agree it needs more study. But I tend to think that the time of day for aspirin and other medications may matter more than we suspect.
From WebMD:
High Blood Pressure: Nightly Aspirin May Help: "Taking aspirin at night may help lower blood pressure more than taking aspirin in the morning, new research shows.
It's the first finding of its kind. More studies are needed to check the results before recommendations can be made.
The study was done in Spain. The researchers included Ram�n Hermida, PhD, of the University of Vigo. Their report appears in the Journal of the American College of Cardiology."