Viagra generally refers to sildenafil citrate, 73 year old men can take this product if they are in good health and have no abnormal reaction, but it is generally not recommended to take it if you have a combination of heart disease, kidney disease, and other underlying diseases. The main role of this product is that it can be used for the treatment of erectile dysfunction. Sildenafil citrate can be taken appropriately if the 73-year-old is in good health, has no underlying disease, and has no cold, fever, or pyrexia. However, most of the elderly to about 73 years old, the body may be subhealthy to combine a series of underlying diseases, such as kidney disease, heart disease, or suffering from high blood pressure, high blood sugar, high blood lipids, etc., these cases are generally not recommended to blindly take Sildenafil Citrate, otherwise it will interfere with the treatment of the disease, and it will affect the efficacy of the drug. If you are allergic to the product or allergic to any of the ingredients in Sildenafil need to be prohibited. Dizziness, panic, rapid heartbeat and other symptoms during the use of the drug is a normal reaction, minor cases do not require special treatment, serious symptoms need to consult a doctor. If you need to use the drug, it is recommended that patients under the guidance of a physician to avoid unauthorized use.