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What causes ED?

ED usually has a physical cause, such as disease, injury, or side effects of drugs. Any disorder that causes injury to the nerves or impairs blood flow in the penis has the potential to cause ED.

Because an erection requires a precise sequence of events, ED can occur when any of the events is disrupted. The sequence includes nerve impulses in the brain, spinal column, and area around the penis, and response in muscles, fibrous tissues, veins, and arteries in and near the corpora cavernosa.

Damage to nerves, arteries, smooth muscles, and fibrous tissues, often as a result of disease, is the most common cause of ED. Diseases-such as diabetes, high blood pressure, nerve disease or nerve damage, multiple sclerosis, atherosclerosis, and heart disease-account for the majority of ED cases. Patients should be thoroughly evaluated for these conditions before they begin any form of treatment for ED.

Lifestyle choices that contribute to heart disease and vascular problems also raise the risk of ED. Smoking, drinking alcohol excessively, being overweight, and not exercising are possible causes of ED.

Surgery-especially radical prostate and bladder surgery for cancer-can also injure nerves and arteries near the penis, causing ED. Injury to the penis, spinal cord, prostate, bladder, and pelvis can lead to ED by harming nerves, smooth muscles, arteries, and the fibrous tissues of the corpora cavernosa.

In addition, ED can be a side effect of many common medicines such as blood pressure drugs, antihistamines, antidepressants, tranquilizers, appetite suppressants, and cimetidine, an ulcer drug.

Psychological factors such as stress, anxiety, guilt, depression, low self-esteem, and fear of sexual failure can also cause ED. Even when ED has a physical cause, psychological factors may make the condition worse.

Hormonal abnormalities, such as low levels of testosterone, are a less frequent cause of ED.

How is ED treated?

Most doctors suggest that treatments proceed from least to most invasive. Making a few healthy lifestyle changes may solve the problem. Quitting smoking, reducing alcohol consumption, losing excess weight, and increasing physical activity may help some men regain sexual function.

Cutting back on or replacing medicines that could be causing ED is considered next. For example, if a patient thinks a particular blood pressure medicine is causing problems with erection, he should tell his doctor and ask whether he can try a different class of blood pressure medicine.

Psychotherapy and behavior modifications in selected patients are considered next if indicated, followed by oral or locally injected drugs, vacuum devices, and surgically implanted devices. In rare cases, surgery involving veins or arteries may be considered.

Psychotherapy

Experts often treat psychologically based ED using techniques that decrease the anxiety associated with intercourse. The patient's partner can help with the techniques, which include gradual development of intimacy and stimulation. Such techniques also can help relieve anxiety during treatment for ED from physical causes.

Drug Therapy

Drugs for treating ED can be taken orally, injected directly into the penis, or inserted into the urethra at the tip of the penis.

Oral Medications
In March 1998, the U.S. Food and Drug Administration (FDA) approved sildenafil (Viagra), the first pill to treat ED. Since that time, vardenafil hydrochloride (Levitra) and tadalafil (Cialis) have also been approved. Additional oral medicines are being tested for safety and effectiveness.

Viagra, Levitra, and Cialis all belong to a class of drugs called phosphodiesterase (PDE) inhibitors. Taken an hour before sexual activity, these drugs work by enhancing the effects of nitric oxide, a chemical that relaxes smooth muscles in the penis during sexual stimulation and allows increased blood flow.

The recommended dose for Viagra is 50 milligrams (mg), and the doctor may adjust this dose to 100 mg or 25 mg, depending on the patient. The recommended dose for either Levitra or Cialis is 10 mg, and the doctor may adjust this dose to 20 mg if 10 mg is insufficient. Lower doses of 5 mg and 2.5 mg are available for patients who take other medicines or have conditions that may decrease the body's ability to use the drug. The 5 mg and 2.5 mg doses of Cialis are FDA-approved for daily use.

None of these PDE inhibitors should be used more than once a day. Men who take nitrate-based drugs such as nitroglycerin pills for heart problems should not use any of the three drugs because the combination can cause a sudden drop in blood pressure. Also, men should tell their doctor if they take any drugs called alpha-blockers, which are used to treat prostate enlargement or high blood pressure. The doctor may need to adjust the ED prescription. Taking a PDE inhibitor and an alpha-blocker within 4 hours of each other can cause a sudden drop in blood pressure. A small number of men have experienced vision or hearing loss after taking a PDE inhibitor. Men who experience vision or hearing loss should seek prompt medical attention.

Oral testosterone can reduce ED in some men with low levels of natural testosterone, but it is often ineffective and may cause liver damage. Patients also have claimed that other oral drugs-including yohimbine hydrochloride, dopamine and serotonin agonists, and trazodone-are effective, but the results of scientific studies to substantiate these claims have been inconsistent. Improvements observed following use of these drugs may be examples of the placebo effect-that is, a change that results simply from the patient’s belief that an improvement will occur.

Injectable Medications
While oral medicines improve the response to sexual stimulation, they do not trigger an automatic erection as injections do. Many men achieve stronger erections by injecting drugs into the penis, causing it to become engorged with blood. Drugs such as papaverine hydrochloride, phentolamine, and alprostadil widen blood vessels. The injectable form of alprostadil is marketed as Caverject. These drugs may create unwanted side effects, however, including scarring of the penis and persistent erection, known as priapism. Nitroglycerin ointment, a muscle relaxant, can sometimes enhance an erection when rubbed on the penis.

A system for inserting a pellet of alprostadil into the urethra uses a prefilled applicator to deliver the pellet about an inch into the urethra. The pellet form of alprostadil is marketed as MUSE. An erection will begin within 8 to 10 minutes and may last 30 to 60 minutes. The most common side effects are aching in the penis, testicles, and area between the penis and rectum; a warm or burning sensation in the urethra; redness from increased blood flow to the penis; and minor urethral bleeding or spotting.

Research on drugs for treating ED is expanding rapidly. Patients should ask their doctor about the latest advances.

Vacuum Devices

Mechanical vacuum devices cause an erection by creating a partial vacuum, which draws blood into the corpora cavernosa, engorging and expanding the penis. The devices have three components: a plastic cylinder, into which the penis is placed; a pump, which draws air out of the cylinder; and an elastic ring, which is moved from the end of the cylinder to the base of the penis as the cylinder is removed. The elastic ring maintains the erection during intercourse by preventing blood from flowing back into the body (see Figure 2). The elastic ring can remain in place up to 30 minutes. The ring should be removed after that time to restore normal circulation and to avoid skin irritation.

Couples may find that using a vacuum device requires some practice or adjustment. An erection achieved with a vacuum device may not feel like an erection achieved naturally. The penis may feel cold or numb and have a purple color. Bruising on the shaft of the penis may occur, but the bruises are usually painless and disappear in a few days. Ejaculation may be weakened because the elastic ring blocks some of the semen from traveling through the urethra, but the pleasure of orgasm is usually not affected.

Erectile Dysfunction

Erectile dysfunction is sexual dysfunction characterized by the inability to develop or maintain an erection of the penis during sexual performance. A penile erection is the hydraulic effect of blood entering and being retained in sponge-like bodies within the penis. The process is often initiated as a result of sexual arousal, when signals are transmitted from the brain to nerves in the penis. Erectile dysfunction is indicated when an erection is difficult to produce. There are various circulatory causes, including alteration of the voltage-gated potassium channel, as in arsenic poisoning from drinking water. The most important organic causes are cardiovascular disease and diabetes, neurological problems (for example, trauma from prostatectomy surgery), hormonal insufficiencies (hypogonadism) and drug side effects.

Psychological impotence is where erection or penetration fails due to thoughts or feelings (psychological reasons) rather than physical impossibility; this is somewhat less frequent but often can be helped. Notably in psychological impotence, there is a strong response to placebo treatment. Erectile dysfunction, tied closely as it is about ideas of physical well being, can have severe psychological consequences. Besides treating the underlying causes such as potassium deficiency or arsenic contamination of drinking water, the first line treatment of erectile dysfunction consists of a trial of PDE5 inhibitor drugs (the first of which was sildenafil or Viagra). In some cases, treatment can involve prostaglandin tablets in the urethra, injections into the penis, a penile prosthesis, a penis pump or vascular reconstructive surgery. The Latin term impotentia coeundi describes simple inability to insert the penis into the vagina. It is now mostly replaced by more precise terms. The study of erectile dysfunction within medicine is covered by andrology, a sub-field within urology.

Female Sexuality

Human female sexuality encompasses a broad range of behaviors and processes, including female sexual identity and sexual behavior, the physiological, psychological, social, cultural, political, and spiritual or religious aspects of sex. Various aspects and dimensions of female sexuality, as a part of human sexuality, have also been addressed by principles of ethics, morality, and theology. In almost any historical era and culture, the arts, including literary and visual arts, as well as popular culture, present a substantial portion of a given society's views on human sexuality, which also include implicitly or explicitly female sexuality.

In most societies and legal jurisdictions, there are legal bounds on what sexual behavior is permitted. Sexuality varies across the cultures and regions of the world, and has continually changed throughout history, and this applies equally to female sexuality. Aspects of female sexuality include issues pertaining to biological sex, body image, self-esteem, personality, sexual orientation, values and attitudes, gender roles, relationships, activity options, and communication.

Auditions for movies

Auditions for movies are how actors actually get acting jobs in film. Auditions are held by producers and casting directors. They choose whom to cast after an audition has been held. Always bring a headshot and resume to an audition. Auditions for movies will have certain protocol throughout the casting process that every actor should be aware of. When performing a movie audition it is okay to ask where to look once you begin, especially if there is no camera in the room. To find out more information on how to audition for movies go to audition/movies. Auditions for movies is the process of trying out for a role in a performance, as in a demonstration of acting ability.

An acting audition is used in the casting process to demonstrate the level and range of a performer's talent, and functions as well as finding the right actor for the work written. For actors, the audition piece is typically not from the show being considered. Some auditions involve cold reading, or performing a script that the actor is not familiar with. An actor may be called back multiple times during an acting audition for a certain role. Any actor knows that in order to build a career and to start landing paying jobs, you have to audition. Visit auditions to find out everything you need to know about auditioning.