Viagra (sildenafil) is a medication used to treat erectile dysfunction (ED) in men. It works by inhibiting the enzyme phosphodiesterase type 5 (PDE5), which regulates blood flow to the penis. By blocking PDE5, Viagra promotes the relaxation of smooth muscle tissue in the penis and increases blood flow, facilitating the achievement and maintenance of an erection during sexual stimulation. you can try Filagra 100mg

After oral ingestion, Viagra typically takes effect within 30 to 60 minutes, with peak plasma concentrations reached within 1 to 2 hours. The duration of Viagra's effects varies from person to person but generally lasts for about 4 to 6 hours, allowing for a window of opportunity for sexual activity. Some individuals may experience effects for up to 8 hours, depending on factors such as metabolism, dosage, and individual response to the medication.