Viagra (Sildenafil Citrate) UK

Viagra contains Sildenafil Citrate, a medicine used to treat erectile dysfunction in men. It works by increasing blood flow to the penis during sexual stimulation, helping achieve and maintain a firm erection. The tablet is usually taken about 30 to 60 minutes before sexual activity, and its effects can last for several hours. Some men may experience mild side effects like headache or flushing. It should be used only as prescribed by a doctor.