Erectile dysfunction (ED) is classified as the inability to get an erection. Getting ED every once in a while is typically not a medical emergency, but some men may experience ED for a long period. Being over 50, having high blood pressure or high cholesterol, smoking, being overweight, and having diabetes are significant risk factors for ED. Viagra, Cialis, and Levitra may be prescribed to assist in ED symptoms and improve a man's sex life. These medications increase blood flow to the penis, improving erectile function. Explore Canadian Pharmacy Service to learn more about your ED treatment options.