Key points from article :
New study suggests more protective effects of blood pressure medication when taken at night.
Blood pressure should naturally decrease at night, during resting and sleeping.
Persistently elevated high blood pressure at night increases risk of heart attacks and strokes.
Further research amongst other ethnic groups and people who work shift patterns are needed.
Studied more than 19,000 people on antihypertensive medications in this large trial.
Research by University of Vigo, published in European Heart Journal.
