Viagra, also known as sildenafil citrate, is effective for 70 year olds, but for seniors, the use of such drugs is not recommended. Sildenafil citrate is a medication that helps men to treat erectile dysfunction, such medications can help men to fulfill their sexual life, but it itself has a large number of adverse reactions, and it is not suitable for use for elderly men aged 70 years old. The main adverse effects of sildenafil citrate include headache, skin flushing, and dizziness. There are also some rare adverse reactions such as myocardial infarction and sudden cardiac death. In addition, it is contraindicated for those taking nitrate drugs. Elderly patients are not recommended due to decreased metabolic rate of the body, slow metabolism of the drug after use, and increased risk of adverse events. To summarize, the use of this drug is not recommended for the elderly, if there is a need, you should consult a doctor in a timely manner and use it correctly under the guidance of a physician.