Guys who are preparing for pregnancy are usually allowed to take sildenafil. Sildenafil belongs to the group of medicines used to treat impotence. This drug does not adversely affect the quality of semen or embryos in men, so men who are preparing for pregnancy can usually take this product as well. However, it is important to note that adverse reactions to the use of this drug include dizziness, flushing, headache, indigestion, nausea, rash, visual abnormalities, myalgia, and back pain. In addition, it should be noted that it is forbidden to combine this drug with nitrate drugs, this drug is contraindicated in women, people who are allergic to this product, children, people whose recent cardiovascular state does not allow them to have sex. It is recommended to use sildenafil under the guidance of a doctor, it is not advisable to use the drug blindly.