I checked the BP while sitting, several times over a period of two hours, and the range has varied little. I checked it because I felt lethargic after rising from a nap of about 2 hours, made a phone call and felt too tired to talk. Medications: I am on Xanax, .5mg x 2 (anxiety); lamictal, 200 mg daily (depression); accupril for heart; Plavix for coronary stent; Avodart for enlarged prostate; baby aspirin, all of this daily. I have moved about for about three hours and the bp is elevated to 118/71, Pulse 64. This is still low for me. I am on several vitamins, including B5, multiple, OsteoBiflex; lecithin, cod liver oil; occasionally L-Theanine at bedtime when I cannot get to sleep, which without it would be about 2 or 3 AM. I manage about 7 to 8 hours in 24 of sleep. I also have sleep apnea and use strips across the bridge of my nose.