Viagra is the trade name, generic name sildenafil, whether it is suitable for the elderly, need to be assessed according to the individual situation of elderly patients, no contraindications to the use of can be used, and vice versa is not applicable. If the general health of the elderly can be, no cardiovascular and cerebrovascular diseases and other basic diseases, physical strength can tolerate sexual life, not taking and sildenafil tablets have contraindications to the use of drugs, then generally suitable for the use of sildenafil tablets for the treatment of erectile dysfunction. If the following conditions exist in the elderly, they are generally not suitable for use: 1. patients taking nitrate drugs due to heart disease, such as taking nitroglycerin and other drugs, the combination of the two can lead to low blood pressure, prohibit the simultaneous use of the two. 2. The existence of aortic stenosis, idiopathic hypertrophic subaortic stenosis and other diseases leading to left ventricular outflow tract obstruction. 3. Patients with recent myocardial infarction, ventricular fibrillation and other diseases; patients with heart failure and angina pectoris. 4. Patients with uncontrolled hypertension. In addition, elderly people who suffer from glaucoma, dry eye and other diseases can not apply the drug. Adverse reactions such as headache, dizziness, nasal congestion may occur after taking the drug, and the older the age, the greater the chance of occurrence, the elderly should be closely observed during the use of adverse reactions occurring, discomfort, timely medical treatment. If you need to use the drug, please use under the guidance of a physician or pharmacist.