Cadralazine is primarily used as an antihypertensive agent, effectively managing high blood pressure by relaxing and dilating blood vessels. This action helps to reduce the workload on the heart and improve blood flow, making it beneficial for patients with hypertension. It is often prescribed when other antihypertensive medications are not suitable or effective. Additionally, cadralazine may be used in combination with other drugs to enhance its therapeutic effects in controlling blood pressure levels. Its use is typically monitored by healthcare professionals to ensure optimal dosing and to minimize potential side effects.