Adrenergic alpha-2 Receptor Agonists--therapeutic use Aged Angiotensin II Type 1 Receptor Blockers--therapeutic use Antihypertensive Agents--therapeutic use Blood Pressure--drug effects Brazil--epidemiology Calcium Channel Blockers--therapeutic use Clinical Protocols Clonidine--therapeutic use Diuretics--therapeutic use Drug Discovery Drug Resistance Drug Therapy, Combination Female Humans Hypertension--diagnosis Male Medication Adherence Middle Aged Mineralocorticoid Receptor Antagonists--therapeutic use Prevalence Research Design Spironolactone--therapeutic use Time Factors Treatment Outcome