Viagra is also known as sildenafil citrate, prostate enlargement eating sildenafil citrate is generally not directly harmful, but will have an impact on individual patients. 1. There is no direct harm to the situation: sildenafil citrate is a clinical treatment for male erectile dysfunction, it causes smooth muscle relaxation by stimulating the smooth muscle of the penile corpus cavernosum, so that the blood flow into the penis, to promote penile erection. Common adverse reactions, can cause nausea, vomiting, dizziness, headache, increased heart rate and other symptoms, generally does not directly affect the prostate, so there is no direct harm. 2. on individual patients will have an impact: there are a few individual patients, after using the drug will appear urogenital symptoms, manifested as frequent urination, abnormal ejaculation, genital edema, may aggravate the symptoms caused by prostate hyperplasia. Physical diseases need to go to the hospital for examination first, and all drugs should be used under the guidance of a professional doctor.