Sildenafil tablets are generally not recommended for the elderly. Sildenafil refers to sildenafil citrate tablets, which are mainly used for male erectile dysfunction, impotence, premature ejaculation and so on. Sildenafil citrate tablets, when taken, can stimulate the release of nitric oxide in the cavernous body of the penis, and the released nitric oxide can activate the enzyme guanylate cyclase, so that the level of cyclic guanosine monophosphate can be elevated, which can promote the relaxation of smooth muscle in the cavernous body, so that the blood inflow, used in the treatment of erectile dysfunction disease in men. Specific medication should be taken under medical supervision. It is generally not recommended for the elderly and may cause the following adverse effects. For patients suffering from cardiovascular diseases can not be used, such as coronary heart disease, angina pectoris, arrhythmia, cardiac insufficiency, etc., after taking it may lead to angina attacks, aggravate the condition, or even sudden cardiac death. For hypertensive patients can not be used, the elderly hypertensive patients tend to take antihypertensive drugs to control blood pressure, especially taking nitrate drugs, the drug can cause blood pressure to reduce, the symptoms of insufficient blood supply to the brain, such as dizziness, blurred vision and so on. Cerebrovascular disease patients can not be used, the elderly part of the population suffers from cerebrovascular disease, such as cerebral infarction, cerebral hemorrhage, etc., taking the drug can lead to aggravation of the condition, or even cerebrovascular accidents, endangering life. Sildenafil should be used under the guidance of a doctor to avoid delaying the condition.