Taking Boydine for headaches is because the drug dilates blood vessels, causing vasodilatory headaches. Boydine, chemically known as felodipine extended-release tablets, is primarily used to treat high blood pressure and stable angina, and is swallowed with water in the morning, avoiding swallowing or chewing. The common adverse effects of this drug include mild to moderate ankle edema, facial flushing, headache, palpitations, dizziness, and fatigue. Symptoms often appear when treatment is started or when the dose is increased, and the reaction is often transient, so if the patient can’t tolerate it he or she can change to a different medication under the direction of the physician. Felodipine extended-release tablets can increase the blood concentration of tacrolimus, cyclosporine, cimetidine, you should inform the doctor before starting to take this drug, patients should pay attention to monitoring blood pressure, liver function, etc. during the use of the drug, to avoid low blood pressure, hepatic impairment and other adverse reactions. Avoid grapefruit juice during administration. This product is contraindicated in patients with pregnancy, acute myocardial infarction, decompensated heart failure, and unstable angina. If there is any discomfort, seek medical attention in time, patients are advised to use it under the guidance of a physician and avoid taking it without authorization.