Sildenafil Citrate Tablet 25mg is one of the sizes of Sildenafil Citrate. Its main function is to treat erectile dysfunction of male penis. Sildenafil Citrate can inhibit the degradation of cyclophosphoguanosine during sexual stimulation, promote smooth muscle relaxation and blood inflow, which can enable patients with erectile dysfunction to have a natural erectile response to sexual stimulation, and also prolong the duration of penile erection. Common adverse reactions include headache, flushing, dyspepsia, visual abnormalities, nasal congestion, back pain, nausea, vomiting, and rash. However, Sildenafil Citrate can enhance the antihypertensive effect of nitrate, and Sildenafil Citrate is strictly prohibited for patients taking nitrate and other drugs. In addition, sildenafil citrate is strictly prohibited for patients who are allergic to sildenafil citrate, and patients suffering from cardiovascular and cerebrovascular diseases need to be cautious about taking it. It is recommended that patients use the medication in strict accordance with the doctor’s instructions, and it is strictly prohibited to use the medication privately to prevent serious adverse reactions.