Sildenafil can be taken to prepare for pregnancy, oral sildenafil for men during preparation for pregnancy, generally does not have a significant impact on male semen, does not affect the preparation for pregnancy. Sildenafil is a phosphodiesterase type V inhibitor that is used to treat erectile dysfunction in men. The drug has not been found to affect male sperm. Therefore, as long as the sperm vitality, density, malformation rate, liquefaction time and other indicators are normal while taking the drug, it is possible to prepare for pregnancy. Symptoms such as flushing and blurred vision may occur after taking sildenafil, which usually disappear on their own. The drug is prohibited in combination with nitrate drugs, it is forbidden for women, people who are allergic to the product, children, people whose recent cardiovascular state is not suitable for sexual life. The drug should be taken correctly under the guidance of a doctor to avoid unauthorized use and damage to the body. If there is any discomfort, consult a doctor in time.