ED prevalence increases with age, reaching an estimated 50–75% of men over 70. But prevalence doesn't mean inevitability, and treatment doesn't stop being effective because of a birthday. What does change is the approach — dosing, expectations, comorbidity management, and the definition of a satisfying sexual experience.
What Changes Physiologically
Age-related erectile changes are real and progressive:
- Vascular capacity decreases. Arteriosclerosis affects penile arteries just as it affects coronary arteries. Blood flow reserve declines.
- Nitric oxide production decreases. The endothelial cells that produce the trigger molecule for erections become less responsive.
- Smooth muscle is gradually replaced by fibrosis. The expandable tissue of the corpus cavernosum becomes less compliant.
- Nerve conduction slows. Neural input to the erectile mechanism becomes less efficient.
- Testosterone levels continue declining. The gradual decline that starts in the 30s (1–2% per year) compounds over decades.
The net effect: erections take longer to achieve, require more direct stimulation, may be less rigid, and the refractory period (time between erections) extends significantly — from minutes in young men to hours or days in older men.
PDE5 Inhibitors Still Work — With Adjustments
PDE5 inhibitors remain effective in men over 70, but with some modifications:
Start at lower doses. Hepatic clearance of sildenafil decreases with age, producing higher blood levels at any given dose. Starting at 25mg sildenafil (rather than 50mg) and titrating up is standard practice.
Allow more time. Onset may be slower than in younger men. Plan for 60–90 minutes rather than 30–60.
Account for more medications. Men over 70 take more medications on average, increasing the chance of drug interactions. Nitrate use (for angina) is more common and remains an absolute contraindication for PDE5 inhibitors.
Expect modest rather than dramatic results. A man in his 70s with multiple vascular risk factors may achieve a functional erection with medication rather than a maximally rigid one. This is still a successful treatment outcome.
Beyond Pills: Options for Severe Cases
When PDE5 inhibitors aren't sufficient (more common in older age groups with advanced vascular disease):
Trimix injections remain highly effective regardless of age. The vascular bypass of direct intracavernosal injection overcomes many of the limitations that reduce oral medication effectiveness.
Vacuum devices work mechanically and have no age limitations. They're particularly practical for men who can't use medications due to cardiac conditions.
Penile implants are performed in men over 70 and over 80 with good outcomes, though surgical risk assessment is more thorough at advanced ages.
Redefining Sexual Satisfaction
Sexuality after 70 is not a diminished version of sexuality at 30 — it can be a different experience with its own satisfactions. Many older couples report that decreased emphasis on penetrative performance allows for broader, more varied, and more emotionally connected sexual experiences. Oral sex, manual stimulation, whole-body intimacy, and emotional closeness are forms of sexual expression that don't depend on rigid erections.
The goal of ED treatment at any age is quality of life — not the reproduction of a specific sexual performance from decades earlier. Defining success in terms of "enough for mutual satisfaction" rather than "identical to age 25" is realistic, achievable, and consistent with what the treatments can deliver.