Charles Patrick Davis, MD, PhD
Dr. Charles "Pat" Davis, MD, PhD, is a board certified Emergency Medicine doctor who currently practices as a consultant and staff member for hospitals. He has a PhD in Microbiology (UT at Austin), and the MD (Univ. Texas Medical Branch, Galveston). He is a Clinical Professor (retired) in the Division of Emergency Medicine, UT Health Science Center at San Antonio, and has been the Chief of Emergency Medicine at UT Medical Branch and at UTHSCSA with over 250 publications.
Melissa Conrad Stöppler, MD
Melissa Conrad Stöppler, MD, is a U.S. board-certified Anatomic Pathologist with subspecialty training in the fields of Experimental and Molecular Pathology. Dr. Stöppler's educational background includes a BA with Highest Distinction from the University of Virginia and an MD from the University of North Carolina. She completed residency training in Anatomic Pathology at Georgetown University followed by subspecialty fellowship training in molecular diagnostics and experimental pathology.
- Erectile dysfunction (impotence) facts
- What is erectile dysfunction (ED)?
- What are erectile dysfunction symptoms and signs?
- What is normal penis anatomy?
- How common is erectile dysfunction?
- How does erection occur?
- How is erection sustained?
- What are erectile dysfunction risk factors?
- What causes erectile dysfunction?
- How is erectile dysfunction diagnosed?
- What drugs treat erectile dysfunction?
- What is the treatment for erectile dysfunction?
- Oral phosphodiesterase type 5 (PDE5) inhibitors
- Sildenafil (Viagra)
- Vardenafil (Levitra)
- Tadalafil (Cialis)
- Avanafil (Stendra)
- What are intracavernosal injections?
- What are intraurethral suppositories?
- How effective is testosterone in treating erectile dysfunction?
- Can a penis pump (vacuum device) help erectile dysfunction?
- Can low testosterone level be replaced?
- What about psychological therapy for erectile dysfunction?
- Surgery for erectile dysfunction
- Can over-the-counter (OTC) and/or natural or home remedies treat erectile dysfunction?
- Is it possible to prevent erectile dysfunction?
- What is the prognosis for erectile dysfunction?
- What research is being done for erectile dysfunction?
- Impotence (Erectile Dysfunction, ED) FAQs
- Find a local Urologist in your town
Erectile dysfunction (impotence) facts
- Erectile dysfunction (ED), also known as impotence, is the inability to achieve or sustain an erection for satisfactory sexual activity.
- Symptoms of erectile dysfunction include the inability to have or to sustain a penile erection to complete satisfactory sexual activity.
- Erectile dysfunction is common; experts have estimated that erectile dysfunction affects 30 million men in the United States.
- The causes of erectile dysfunction include aging, high blood pressure, diabetes mellitus, cigarette smoking, atherosclerosis, depression, nerve or spinal cord damage, medication side effects, alcoholism or other substance abuse, and low testosterone levels.
- Erectile dysfunction is treatable in all age groups.
- Treatments include psychotherapy, adopting a healthy lifestyle, oral PDE5 inhibitors (Viagra, Levitra, Cialis, Stendra, and Staxyn), intraurethral medications (MUSE), intracavernosal injections, vacuum devices, surgery, and working with doctors to avoid medications that can impair erectile function.
- Before using over-the-counter and/or supplements, a discussion with a doctor is strongly recommended.
- New research is ongoing in the field of erectile dysfunction to find more improved and effective therapies.
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What is erectile dysfunction (ED)?
Erectile dysfunction (ED), also known as impotence, is the inability to achieve or sustain an erection for satisfactory sexual activity. Erectile dysfunction is different from other conditions that interfere with male sexual intercourse, such as lack of sexual desire (decreased libido) and problems with ejaculation and orgasm (ejaculatory dysfunction). ED affects about 50% of men aged 40 and over. This article focuses on the evaluation and treatment of erectile dysfunction.
What are erectile dysfunction symptoms and signs?
Symptoms of erectile dysfunction may include the following:
- Penile erection occurs but it is not maintained for the length of sexual activity
- Penile erection that is not firm enough to penetrate the vagina
- Inability to obtain a penile erection
What is normal penis anatomy?
The penis contains two chambers, called the corpora cavernosa, which run the length of the upper side of the penis (see figure 1 below). The urethra, which is the channel for urine and ejaculate, runs along the underside of the corpora cavernosa. Filling the corpora cavernosa is a spongy tissue consisting of smooth muscles, fibrous tissues, veins, and arteries. A membrane, called the tunica albuginea, surrounds the corpora cavernosa. Veins located in the tunica albuginea drain blood out of the penis. The corpus spongiosum helps maintain the urethra open during an erection for passage of the ejaculate (sperm and prostatic fluid).
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