Nicardia Retard 20mg Tablet is an antihypertensive agent with an active ingredient called Nifedipine which belongs to the medication class known as calcium channel blockers. This drug is commonly used to treat hypertension (raised blood pressure) and certain types of angina (chest pain) caused by coronary artery disease. In hypertension conditions, this medicine relaxes the blood vessels and makes the blood pass smoothly. In angina, it improves the blood supply, which prevents chest pain. Nicardia Retard 20mg Tablet should not be used in individuals with known hypersensitivity or allergic reactions to this drug or its components. This tablet is contraindicated in patients with acute myocardial infarction (heart attack) and during the initial recovery phase. It may worsen cardiovascular function in these individuals. This drug should be cautiously used in patients with heart conditions, such as heart failure or certain conduction abnormalities. Close monitoring is required in these individuals, and dosage adjustments are necessary. It is important to note that sudden drops in blood pressure can occur when taking Nicardia Retard 20mg Tablet, mainly in individuals with very high blood pressure and low blood volume. This sudden drop in blood pressure is known as orthostatic hypotension (a condition with a significant decrease in blood pressure upon standing up or changing positions). So it is necessary to monitor blood pressure during the treatment with this drug.