This was not a smooth process. The rise of executive power sometimes hurt important interests and always rubbed against the republican sensibilities that Americans inherited from the founders. From time to time, Congress reaped political benefits from thwarting the president. But today Congress reacts rather than leads.
Some of the causes of low blood pressure include: 1  Getting up after you sit or lie down. 2  This can cause a quick drop in blood pressure called orthostatic hypotension. 3  Standing for a long time. 4  Not drinking enough fluids (dehydration).
What causes low blood pressure? The cause of low blood pressure isn't always clear. It may be associated with the following: Pregnancy; Hormonal problems - such as an underactive thyroid (hypothyroidism), overactive thyroid (hyperthyroidism), diabetes, and low blood sugar (hypoglycaemia) Over-the-counter medication; Overdose of high blood pressure medication; Heart failure