Vigora 100 mg contains sildenafil citrate, which is a medication used to treat erectile dysfunction (ED) in men. Sildenafil citrate is a phosphodiesterase type 5 (PDE5) inhibitor that works by increasing blood flow to the penis when a man is sexually stimulated, thereby helping him achieve and maintain an erection. The onset of action of Vigora 100 mg can vary among individuals, but generally, it starts to work within 30 minutes to 1 hour after administration when taken on an empty stomach. However, individual responses may vary based on factors such as metabolism, age, overall health, and dosage. Here are some key points regarding the onset of action of Vigora 100 mg: Sexual stimulation: Vigora 100mg, like other medications for ED, requires sexual stimulation to be effective. The medication does not produce an automatic erection on its own; sexual arousal is necessary for the medication to work. Rapid absorption: Sildenafil citrate is rapidly absorbed into the bloodstream after oral administration. It typically reaches peak plasma concentrations within 30 to 120 minutes after ingestion. Food intake: Taking Vigora 100 mg with a heavy meal, especially one high in fat, may delay the onset of action of the medication. It's generally recommended to take Vigora 100 mg on an empty stomach or with a light meal for optimal absorption and effectiveness. Duration of action: The effects of Vigora 100 mg typically last for about 4 to 6 hours after administration, although individual responses may vary. This means that the medication can help maintain erectile function during this time frame, allowing for satisfactory sexual activity. Vigora 100 mg typically starts to work within 30 minutes to 1 hour after administration, but individual responses may vary. It's essential to follow the prescribed dosage and instructions for use and to discuss any concerns or questions about the medication with a healthcare professional. If you have any underlying health conditions or are taking other medications, be sure to consult with your healthcare provider before using Vigora 100 mg.