CHQ: SUBJECT: High Blood Pressure
  MESSAGE: I know you may not answer this but my blood pressure comes up at night when I am asleep. I take four medicines. I have asked doctors why this happens and no one knows. This morning at four A.M. It was 164 and I took a clonidine to help get it done. It worries me so.
Summary: What causes a rise in blood pressure when asleep?