Diabetes is the most common cause of erectile dysfunction, affecting up to 50% of men with diabetes.

Smoking, obesity, and physical inactivity are all risk factors for erectile dysfunction.

Oral medication, such as sildenafil (Viagra), tadalafil (Cialis), and vardenafil (Levitra), is the first-line treatment for erectile dysfunction.

Headache, flushing, and nausea are all common side effects of oral medication for erectile dysfunction.

Vascular disease is the most common cause of organic erectile dysfunction, accounting for up to 70% of cases.

Heart disease, diabetes, and high blood pressure are all risk factors for vascular erectile dysfunction.

Oral medication, such as sildenafil (Viagra), tadalafil (Cialis), and vardenafil (Levitra), is the first-line treatment for vascular erectile dysfunction.

Headache, flushing, and nausea are all common side effects of oral medication for vascular erectile dysfunction.

Multiple sclerosis, Parkinson's disease, and stroke are all common causes of neurological erectile dysfunction.

Diabetes, high blood pressure, and head injury are all risk factors for neurological erectile dysfunction.

Oral medication, such as sildenafil (Viagra), tadalafil (Cialis), and vardenafil (Levitra), is the first-line treatment for neurological erectile dysfunction.

Headache, flushing, and nausea are all common side effects of oral medication for neurological erectile dysfunction.

Low testosterone is the most common cause of hormonal erectile dysfunction.

Aging, obesity, and diabetes are all risk factors for hormonal erectile dysfunction.

Testosterone replacement therapy is the first-line treatment for hormonal erectile dysfunction.