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The history should include the frequency and duration of symptoms, the presence or absence of morning erections and the quality of the relationship with the sexual partner. The sudden onset of erectile dysfunction in association with normal morning erections or a poor relationship suggests psychogenic impotence.4 Spinal cord injury Levetra(Vardenafil Citrate) is a drug acclimated to to scrutinize erectile dysfunction. It is FDA approved medication. A recent study of more than 8,000 Australian men between the ages of 16 and 59 found that those who smoked less than a pack a day had a 24 percent increased risk of erectile problems. And, as the number of cigarettes smoked went up, so, too, did the chances of erectile dysfunction. Those men who averaged more than 20 cigarettes a day increased their risk of erectile dysfunction by 39 percent, reported the study, published in the journal Tobacco Control. An erection begins in the brain. Physical and/or mental stimulation cause nerves in the brain to send chemical messages to nerves in the penis telling the penile blood vessels to relax so that blood can flow freely into the penis. Once in the penis, high pressure traps the blood within both corpora cavernosa to sustain an erection. This causes the penis to expand, creating an erection. free samples viagra 100mg viagra online without prescription