Tildiem is a brand name for the medication diltiazem, which belongs to a class of drugs known as calcium channel blockers. It is primarily used to treat hypertension (high blood pressure) and angina pectoris (chest pain caused by reduced blood flow to the heart). Tildiem works by relaxing the muscles of the heart and blood vessels, improving blood flow and reducing the heart's workload, which can help to lower blood pressure and alleviate symptoms of angina. It may be prescribed alone or in combination with other medications depending on the specific needs of the patient. As with any medication, it is important to follow the prescribing doctor's instructions and be aware of potential side effects.