Viagra generic name is sildenafil tablets, and taking sildenafil tablets on the night of pregnancy preparation may have side effects such as facial edema and headache. In addition, patients should follow the doctor’s instructions to use the drug, allergic to the drug, breastfeeding women and patients younger than 18 years old are contraindicated to use the drug. Sildenafil tablets can be used to treat erectile dysfunction in men, and patients taking sildenafil tablets on the night of preparation for pregnancy may experience side effects such as facial edema, headache, dyspepsia, blurred vision, eyelid edema, conjunctival congestion, sudden deafness, palpitations, seizures, dizziness, flushing, nasal congestion, rashes, measles, myalgia, and so on. It is recommended that patients can take sildenafil tablets under the guidance of a doctor, can not use sildenafil tablets without authorization; sildenafil tablets ingredients allergy, women and children, are taking nitrate drugs and other groups of people should be contraindicated to treat with the drug. Studies have shown that sildenafil has no effect on sperm quality and can be taken by patients with erectile dysfunction during pregnancy. It is recommended that patients should rest more during the preparation for pregnancy, avoiding fatigue, and can do appropriate physical exercise every day.