The generic name of Boydine is Felodipine Extended-Release Tablets, which is mainly used for hypertension and stable angina pectoris. Most of the patients can take it for a long time if their blood pressure is under ideal control without obvious discomfort. However, some patients taking felodipine extended-release tablets for a long time may have adverse reactions in circulatory system, gastrointestinal tract, nervous system, skin and so on. 1. Circulatory system: flushing with heat sensation, ankle edema, palpitation, tachycardia, etc; 2. gastrointestinal tract: nausea, abdominal pain, vomiting, etc; 3. nervous system: headache, dizziness, sensory abnormalities, etc; 4. Skin: rash, itching, urticaria, photosensitivity reaction, etc. In addition to this, long-term use of felodipine extended-release tablets may also have adverse reactions such as hyperglycemia, elevated liver enzymes, arthralgia and so on. If you are taking felodipine extended-release tablets for a long period of time, you need to be evaluated by the doctor to reduce the dosage or change the antihypertensive drug according to the patient’s blood pressure control level, any discomfort or complications, and do not stop taking the drug by yourself, so as not to cause the blood pressure to rise repeatedly.