Be weary of messing with electrolytes, potassium/sodium/calcium imbalances can be life threatening.
From here, you may need to sign up though to see the article:
Hyperkalemia: Overview - eMedicine Emergency Medicine
"Hyperkalemia is a potentially life-threatening illness that can be difficult to diagnose because of a paucity of distinctive signs and symptoms. The physician must be quick to consider hyperkalemia in patients who are at risk for this disease process. Because hyperkalemia can lead to sudden death from cardiac arrhythmias, any suggestion of hyperkalemia requires an immediate ECG to ascertain whether electrocardiographic signs of electrolyte imbalance are present.
Hyperkalemia results from the following:
Decreased or impaired potassium excretion - As observed with acute or chronic renal failure (most common), potassium-sparing diuretics, urinary obstruction, sickle cell disease, Addison disease, and systemic lupus erythematosus (SLE)
Additions of potassium into extracellular space - As observed with potassium supplements (eg, PO/IV potassium, salt substitutes), rhabdomyolysis, and hemolysis (eg, venipuncture, blood transfusions, burns, tumor lysis)
Transmembrane shifts (ie, shifting potassium from the intracellular to extracellular space) - As observed with acidosis and medication effects (eg, acute digitalis toxicity, beta-blockers, succinylcholine)
Factitious or pseudohyperkalemia - As observed with improper blood collection (eg, ischemic blood draw from venipuncture technique), laboratory error, leukocytosis, and thrombocytosis"
Other than that, the first steps of treating hypertension are diet/lifestyle changes. I believe anywhere from 1-3 months will show whether or not this can be successful (most MD's bypass this step because it has a very low success rate and jump straight to meds). This includes low sodium diets (nothing canned, no added salt, limit frozen foods, nothing processed/preserved etc), exercise, stress management. You can check out the DASH diet, its what the medical authorities recommend.
The next step is meds, they are fairly benign. Low dose calcium channel blocker plus the above mentioned interventions may be all that you need. That is for you and your doc to decide though.