Antihypertensive Drugs
Antihypertensive drugs are medications used to treat high blood pressure (hypertension). By lowering blood pressure, these drugs help reduce the risk of heart attacks, stroke, and other cardiovascular diseases.
Classification
- 1. ACE Inhibitors:
- Enalapril, Ramipril, Lisinopril
- 2. Angiotensin II Receptor Blockers (ARBs):
- Losartan, Valsartan
- 3. Renin Inhibitors:
- Aliskiren
- 4. Diuretics:
- Hydrochlorothiazide, Furosemide, Spironolactone
- 5. Beta Blockers:
- Atenolol, Metoprolol, Propranolol
Pharmacodynamics
- 1. ACE Inhibitors:
- Inhibit the angiotensin-converting enzyme (ACE), reducing the production of angiotensin II, leading to vasodilation (widening of blood vessels) and decreased aldosterone secretion, ultimately lowering blood pressure.
- 2. Angiotensin II Receptor Blockers (ARBs):
- Block the angiotensin II receptors, preventing vasoconstriction (narrowing of blood vessels) and aldosterone secretion, resulting in a lowered blood pressure.
- 3. Renin Inhibitors:
- Inhibit the activity of renin, which decreases the conversion of angiotensinogen to angiotensin I, leading to reduced levels of angiotensin II and lower blood pressure.
- 4. Diuretics:
- Increase the excretion of sodium and water from the kidneys, reducing blood volume, which leads to a decrease in blood pressure.
- 5. Beta Blockers:
- Block beta-adrenergic receptors in the heart, leading to a decrease in heart rate and cardiac output, both of which help lower blood pressure.