Sildenafil generic name is Sildenafil Citrate, regular consumption of Sildenafil Citrate may be bad for the body and may cause adverse reactions such as headache, indigestion, nasal congestion and abnormal vision. Sildenafil citrate is a type 5 phosphodiesterase inhibitor and is clinically used to treat erectile dysfunction. If patients take sildenafil citrate regularly, patients may experience adverse reactions such as headache, dyspepsia, flushing, nasal congestion, and abnormal vision. Sildenafil Citrate is not suitable for people such as newborns, children and women. Patients who are allergic to the ingredients of Sildenafil Citrate are prohibited from taking it in order to avoid allergic symptoms such as itching, rash and other discomforts. When patients need to take Sildenafil Citrate, it is recommended to take it under the guidance of a doctor and not to abuse the drug on their own to avoid serious consequences.