Fuli,

You may wish to speak with a lawyer and be examined by a physician who
has access to your medical records, including these blood pressure records.
The nurse with whom you corresponded clearly states that the blood pressure
machine should have sounded an alarm if your blood pressure became too low.
Since you do not mention an alarm sounding it is difficult to believe that
you had low blood pressure. I don't think therefore that the dose of
clonidine was inappropriate or caused a dramatic decrease in your blood
pressure. Perhaps the symptoms that you experienced were unrelated to the
clonidine.
I'm far more troubled by the possibility that you had a second stroke
during your hospital stay. With the sudden onset of symptoms the nurse
should have summoned a doctor. The nurse's failure to act during the onset
of numbness, weakness, et c. may indeed be malpractice.

Good luck,
Dave M