My low blood pressure occasionally makes me feel faint.  How can I avoid passing out?
D001794:Blood Pressure; D006439:Hemodynamics; D006801:Humans; D007022:Hypotension / Q000150:complications*; D010698:Phobic Disorders / Q000150:complications; D013575:Syncope / Q000209:etiology* / Q000517:prevention & control*