The most common symptoms of erectile dysfunction include difficulty achieving or maintaining an erection and reduced sexual desire. Your reassurance that this isn’t the case can help. An erection results from an increase in blood flow to the penis. However, others work on a cash-pay basis and don’t partner with insurance companies. What kinds of tests do I need? · Viagra can help you have an erection when sexual stimulation occurs. An erection will not occur just by taking a pill. Follow your doctor’s instructions. During . Your doctor or other health care professional can recommend one for you based on these factors, other health conditions you have and any other medicines you . 1 day ago · While some countries sell Viagra over-the-counter, in the United States, Viagra and similar ED medications like sildenafil, Cialis, and tadalafil, require a prescription .