Boeudine, also known as felodipine extended-release tablets, belongs to the dihydropyridine class of calcium channel blockers. Its antihypertensive effect is mainly through blocking voltage-dependent L-type calcium channels, reducing the entry of extracellular calcium ions into vascular smooth muscle cells, thus reducing the contractile response of resistance vessels and acting as a blood pressure reducer. The main side effect of Povidone is that at the beginning of treatment, it can cause reflex sympathetic nerve activity, increased heart rate, facial flushing, headache, lower limb edema and other side effects, the edema is characterized by morning light and afternoon heavy, mostly seen in the ankle, lower limb foot or calf. If the patient’s symptoms are mild at the time of side effects, the patient can stop using Boydin. If the symptoms are more severe, it is necessary to switch to other antihypertensive drugs with other antihypertensive mechanisms for antihypertensive treatment.