Nifedipine is a medication primarily used to treat high blood pressure and angina, a type of chest pain. It belongs to a class of drugs known as calcium channel blockers, which work by relaxing the blood vessels, allowing blood to flow more easily. This helps to lower blood pressure and reduce the workload on the heart. Nifedipine is often prescribed in extended-release forms to provide a steady effect over time. Common side effects may include headache, flushing, and swelling in the legs or ankles. Patients should follow their doctor's instructions and report any unusual symptoms.