Sildenafil is used to treat erectile dysfunction and sexual stimulation is required for the drug to take effect when taken. In the absence of external sexual stimulation, the recommended dose of sildenafil does not work and is metabolized over time; therefore, you can take sildenafil citrate tablets without having sex. When using the drug, headache, dyspepsia, nausea and other adverse reactions may occur; children, women, people who are allergic to the product and other people should be prohibited from using the product, and the product is prohibited from being used with guanylate cyclase agonists, nitrate esters and other drugs. If there is a need for medication, it is recommended to consult a doctor in a timely manner, follow the doctor’s instructions to standardize the use of medication, and avoid blind use of medication or change the dosage, so as not to cause discomfort.