I am a 48-year-old Caucasian female.  I am 5 feet tall and weigh 108 pounds.  I do not smoke or drink alcohol.  I exercise occasionally.  My BP readings have always been normal.  I started taking Elavil, 50 mg., for migraine prevention starting July 09.  Yesterday (October 09) went for follow-up visit to discuss Elavil and my BP readings were in the 160's/100's.  Doctor felt this was a fluke, but asked that I purchase a BP monitor and return to see him in three months.  I did purchase a monitor and have checked a few times and it is still elevated in the 160's/100's.  My question is what could cause such a dramatic change in my BP in such a short period of time?  I have never even had an elevated reading before.  The only other medication I take is Lexapro, 10 mg. daily, for GAD, which I have been taking since July 2004.  I'm wondering if the Elavil might be the cause.