Viagra

Viagra, known generically as sildenafil, is a medication used to treat erectile dysfunction (ED), which is the difficulty in achieving or maintaining an erection sufficient for sexual activity. It works by increasing blood flow to the penis when a man is sexually aroused, helping to produce an erection. Viagra does not increase libido or sexual desire; it requires sexual stimulation to be effective. It is usually taken about 30 to 60 minutes before activity and its effects can last for several hours. It is important to use Viagra under medical supervision, especially for individuals with certain health conditions or those taking other medications.