Viagra is the trade name and generic name for sildenafil citrate tablets, which are commonly used in the treatment of erectile dysfunction, and can be used in elderly people aged 70 years, but caution is needed and the starting dose should be reduced. Pharmacokinetic tests have confirmed that the clearance of sildenafil is reduced in healthy older adults (≥65 years), i.e., taking the same starting dose, the blood concentration of older adults is higher, and higher blood concentrations may increase both the efficacy of the treatment and the risk of adverse events, so the starting dose should be reduced in older adults if there are no contraindications to the use of the drug. It should be noted that when sildenafil is used in combination with antihypertensive drugs, it is easy to have a cumulative antihypertensive effect, which may lead to hypotension, dizziness, or even fainting shock. Since hypertension is a common disease among the elderly, it is necessary to consult a physician before taking the drug, and use the drug under the guidance of a professional physician, and if there is any discomfort, the drug should be stopped immediately and seek medical attention in a timely manner. It should also be noted that the drug is forbidden to be combined with nitrate drugs, and the drug is contraindicated for women, people who are allergic to the product, children, and people whose recent cardiovascular status makes them unfit for sex.