Erectile Dysfunction

Erectile dysfunction is the persistent inability to achieve or maintain an erection firm enough for satisfactory sexual activity. Occasional difficulty is normal — ongoing ED is not. It's common, often treatable, and frequently a signal of something else going on in a man's body worth identifying.

How an Erection Actually Works

An erection involves the brain, nerves, hormones, blood vessels, and penile tissue working in sequence:

• Stimulation — visual, physical, or emotional triggers signal the spinal cord and penile nerves
• Nitric oxide release — relaxes smooth muscle in penile arteries
• Blood flow in — arteries widen and fill the corpora cavernosa
• Venous trap — the engorged tissue compresses outflow veins, holding blood in
• Detumescence — after orgasm, blood flow decreases and veins reopen

Any disruption — vascular, neurologic, hormonal, psychological, structural — can cause ED.

What Causes It

ED is usually multifactorial. The most common categories:

Vascular

Often the biggest contributor. Includes high blood pressure, high cholesterol, atherosclerosis, diabetes, obesity, smoking, and cardiovascular disease. ED is often one of the earliest visible signs of underlying heart disease.

Hormonal

Low testosterone, elevated prolactin, thyroid disorders, pituitary disorders. Low testosterone also commonly contributes to low libido, fatigue, and reduced erectile quality.

Neurologic

Diabetic neuropathy, multiple sclerosis, Parkinson's, stroke, spinal cord injury, and pelvic surgery. Men who've undergone radical prostatectomy frequently experience ED from injury to the cavernous nerves.

Medication-related

Many blood pressure meds, antidepressants, anti-anxiety meds, opioids, and prostate medications can blunt erections.

Psychological

Performance anxiety, stress, depression, relationship strain, anxiety disorders. Physical and psychological causes often coexist.

Lifestyle

Smoking, excess alcohol, poor sleep, sedentary patterns, obesity, chronic stress.

How ED Is Evaluated

A thorough evaluation identifies the underlying cause and shapes the treatment plan:

• Detailed medical and sexual history
• Physical examination
• Hormonal and metabolic testing
• Cardiovascular risk assessment
• Penile duplex Doppler ultrasound when indicated

The goal isn't to prescribe a pill — it's to identify the root cause.

Treatment Options

Oral medications (PDE-5 inhibitors)

First-line for most men. Sildenafil (Viagra), tadalafil (Cialis), vardenafil (Levitra), avanafil (Stendra) — all enhance the nitric oxide pathway. Effective for many men, but require adequate blood flow and nerve function. Common side effects: headache, flushing, nasal congestion, indigestion.

Vacuum erection device (VED)

Creates negative pressure around the penis, drawing blood into erectile tissue. A constriction ring at the base maintains rigidity. Non-surgical and drug-free. Frequently used for penile rehabilitation after prostate cancer surgery.

Low-intensity shockwave therapy (LiSWT)

Regenerative treatment delivering low-energy acoustic waves to penile tissue to stimulate new blood vessel formation and tissue healing. Particularly useful for mild-to-moderate vasculogenic ED. Multiple sessions required; results vary.

Intraurethral therapy

Medication placed into the urethra, absorbed locally. Less reliable than injection therapy but avoids the needle.

Intracavernosal injection therapy (ICI)

Medication (Trimix, Bimix) injected directly into erectile tissue. Among the most effective non-surgical treatments — often works when oral medications fail. Requires self-injection; small risk of prolonged erection.

Penile implant surgery

For men who don't respond to conservative treatment or want a permanent solution. Inflatable penile prosthesis (IPP) — a fully concealed device implanted in the body — produces a firm, natural-feeling erection on demand. Satisfaction rates exceed 90%, the highest of any ED treatment.