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Accurate risk factor identification and characterization are essential for prevention or treatment of erectile dysfunction.

The following are some of the different types and possible causes of impotence: Premature ejaculation (PE) .

Premature ejaculation is the inability to maintain an erection long enough for mutual satisfaction. Premature ejaculation is divided into primary and secondary forms: Primary premature ejaculation . Primary premature ejaculation is a learned behavior that begins when a male first becomes sexually active. This form of primary PE is psychogenic (as opposed to organic or physical) impotence.

(Congenital venous leak is a subset of primary PE and is caused by a congenital condition in which the venous drainage system in the penis does not shut down properly.) Secondary premature ejaculation .

Secondary premature ejaculation occurs when, after years of normal ejaculation, the duration of intercourse grows progressively shorter.

Secondary PE is due to physical causes, usually involving the penile arteries, veins, or both. Performance anxiety is a form of psychogenic impotence, usually caused by stress. Depression is another cause of psychogenic impotence.

Some purchase viagra antidepressant medications cause erectile failure.

Organic impotence involves the penile arteries, veins, or both and is the most common cause of impotence, especially in older men.

When the problem is arterial, it is usually caused by arteriosclerosis, or hardening of the arteries, although trauma to the arteries may be the cause.

The controllable risk factors for arteriosclerosis--being overweight, lack of exercise, high cholesterol, high blood pressure, and cigarette smoking--can cause erectile failure viagra super active plus online often before progressing to affect the heart. Many experts believe that when veins are the cause, a venous leak, or cavernosal failure, is the most common vascular problem.

have diabetes, and 35 to 50 percent of these men are impotent. The process involves premature and unusually severe hardening of the arteries. Peripheral neuropathy, with involvement of the nerves controlling erections, is commonly seen in people with diabetes.

There are many neurological (nerve problems) causes of impotence. Diabetes, chronic alcoholism, multiple sclerosis, heavy metal poisoning, spinal cord and nerve injuries, and nerve damage from pelvic operations can cause erectile dysfunction.

A great variety of prescription drugs, such as blood pressure medications, antianxiety and antidepressant medications, glaucoma eye drops, and cancer chemotherapy agents are just some of the purchase viagra many medications associated with impotence.

Hormonal abnormalities, such as increased prolactin (a hormone produced by the anterior pituitary gland), steroid abuse by bodybuilders, too much or too little thyroid hormone, and hormones administered for prostate cancer may cause impotence. Rarely is low testosterone responsible for impotence. Diagnostic procedures for ED may include the following: Patient medical or sexual history . This may reveal conditions or diseases that lead to impotence and help distinguish among problems with erection, ejaculation, orgasm, or sexual desire.

To look for purchase viagra evidence of systemic problems, such as

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When low sexual desire is a symptom, measurement of testosterone in the blood can yield information about problems with the endocrine system. This is done to help reveal psychological factors that may be affecting performance. The sexual partner may also be interviewed to determine expectations and perceptions encountered during sexual intercourse. Specific treatment for erectile dysfunction will be determined by your doctor based on: Your age, overall health, and medical history. Your tolerance for specific medications, procedures, or therapies.

Some of the treatments available for ED purchase viagra include: Medical treatments: Sildenafil citrate (Viagra) .

A prescription medication viagra in medical store taken orally for the treatment of ED.

Viagra does not directly cause penile erection, but affects the response to sexual stimulation. In clinical studies, Levitra has been shown to work quickly and improve sexual function in men the first time they take the medication.

It has been shown to work well in men of all ages, in men with diabetes, and in men who have had the surgical procedure called radical prostatectomy. Studies have indicated that Cialis stays in the body longer than other medications in its class.

Most men who take this medication generic viagra soft tabs find that an erection occurs within 30 minutes and the effects of the medication may last up to 36 hours. The FDA recommends that men follow general precautions before taking a medication for ED.