2.1.6.2.1 Angiotensin system modulators

2.1.6.2.2 Adrenergic (and mixed) antagonists

2.1.6.2.3 Centrally acting receptor agonists

2.1.6.2.4 Diuretics

2.1.6.2.5 Vasodilators (eg, nitrates, nitrites)