160/100? your bp is way to high not low. you are playing with loaded dice that arnt in your favor, is your BP always this high? I get dizzy spells from my spiro, but only when I stand up to fast, or sit for prolonged periods or if im overly exhausted. or bend over to many times in a row. My bp is 120 over 65. but yours has me worried. as an ex emt, id think the spiro would help you, but if its got you dizzy im concerned, DIYS is dangerious but if your gonna stick to it, id recommend lowering your dose and slowly getting used to it.