Angiotensin-converting enzyme (ACE) inhibitors are a type of medicine used to treat hypertension (high blood pressure), heart failure, and some kidney illnesses. These medications function by inhibiting the angiotensin-converting enzyme, which converts angiotensin I to angiotensin II. Angiotensin II is a strong vasoconstrictor, which means it constricts blood vessels and raises blood pressure. These drugs assist widen blood arteries by inhibiting ACE, lowering blood pressure and lessening the burden on the heart. They also reduce aldosterone synthesis, a hormone that can contribute to fluid retention and increased blood volume. As a result, ACE inhibitors are useful in the treatment of a variety of cardiovascular diseases. Enalapril, lisinopril, ramipril, and captopril are examples of common ACE inhibitors. They are usually taken orally and have different durations of action, dose frequencies, and adverse effects. Because of their effectiveness in treating hypertension and heart failure, these medicines are commonly prescribed. ACE inhibitors efficiently lower blood pressure in hypertensive individuals, lowering the risk of stroke, heart attack, and other cardiovascular problems. These medications can alleviate symptoms, improve cardiac function, and reduce hospitalizations due to heart failure exacerbations in people with heart failure. While ACE inhibitors are generally well tolerated, they can induce negative effects in certain people. A common side effect is a persistent dry cough, which might be uncomfortable enough to require prescription withdrawal. Other side effects may include dizziness, hyperkalemia (high blood potassium levels), and changes in kidney function, particularly in people who already have kidney disease. When using ACE inhibitors in specific populations, such as pregnant women, special precautions must be used because these drugs can harm the growing fetus. Patients who have had angioedema or severe allergic responses to ACE inhibitors should avoid taking them. Furthermore, ACE inhibitors may interact with other medications, such as nonsteroidal anti-inflammatory drugs (NSAIDs), potassium supplements, and some diuretics, potentially resulting in side effects or decreased efficacy. Individuals taking ACE inhibitor therapy must have their blood pressure, renal function, and potassium levels checked on a regular basis to verify that their condition is being managed optimally while minimizing any negative effects. As with any medication, it is critical to follow the directions of your healthcare practitioner and report any worrying symptoms as soon as possible.