If you suffer hypertension (abnormally high blood pressure), we go through a standard regimen that eliminates any potential causes for the condition before we even think about prescribing antihypertensives: these drugs are potentially lethal if abused. Alpha and Beta blockers can cause cardiac arrest in the case of any overdose. To reverse the effect we must inject (sometimes massive) doses of epinephrine directly into the heart.
If you suffer chronic hypotension (abnormally low blood pressure) we also eliminate any cause for the condition before we consider medication. Hypotension is much easier to treat as we prescribe beta adrenergic stimulators, which are much safer and have a much lower potential for complications.
Quite often the best remedy is to change one's diet, lifestyle, etc. The simplest and most natural remedies are ALWAYS the best.
The OP asks about HYPOTENSION and DR. Kelly, the worlds worst veterinarian, gives 3/4 of his answer about HYPERTENSION. Then when he talks about hypotension he fails to mention the most obvious, simple remedy: increasing sodium intake.
There is a poodle with hemmorhoids waiting for your immediate attention, "doctor".
Rocmike's alias Dr. Kelly is starting off today's posting marathon. 3 hours of posting so far.