Erectile function after prostate surgery — the honest timeline

Why erections are affected by prostate surgery

The nerves responsible for erectile function — the cavernous nerves (also called the neurovascular bundles or NVBs) — run along the surface of the prostate on both sides. During prostatectomy, these nerves are in very close proximity to the surgical field. Even with expert nerve-sparing technique, the nerves are stretched, handled, and temporarily deprived of their blood supply during the operation.

The result is a condition called neuropraxia — the nerve is anatomically intact but temporarily non-functioning. Think of it like a nerve "stunned" into silence. The time it takes to wake up and regenerate functional transmission determines when erections return.

Nerve regeneration is a slow biological process — it proceeds at approximately 1 mm per day. The cavernous nerves are approximately 10–15 cm long, which is why recovery takes months to years, not days to weeks.

What nerve-sparing surgery actually means

Nerve-sparing prostatectomy means the surgeon deliberately attempts to preserve the neurovascular bundles rather than removing them with the prostate. Whether nerve-sparing is possible depends on the cancer's location and extent.

Non-nerve-sparing prostatectomy (both NVBs removed) is necessary when cancer invades or is very close to the neurovascular bundles on both sides. Spontaneous erection recovery is very unlikely in this situation — assisted erection (with medications or devices) remains possible.

Realistic recovery timeline

Factors that predict recovery

These are the strongest predictors of erectile recovery after prostatectomy, based on large multicentre studies including the RADICAL database and ProtecT trial data:

• Age — the most powerful predictor. Men under 55 with bilateral nerve-sparing and good pre-operative function have the best outcomes (70%+ recovery at 2 years). Men over 70 have significantly lower recovery rates.
• Pre-operative erectile function — men with excellent pre-operative erections recover more function than those who already had partial ED before surgery.
• Nerve-sparing completeness — bilateral is significantly better than unilateral.
• Early penile rehabilitation — starting PDE5 inhibitor therapy within 4–6 weeks of surgery significantly improves long-term outcomes.
• Cardiovascular health — erections depend on vascular function. Diabetes, hypertension, smoking, and obesity all impair erectile recovery independently of the surgery.
• Surgeon experience — high-volume prostatectomy surgeons consistently report better functional outcomes in published series.

Penile rehabilitation — why it matters and how it works

Penile rehabilitation refers to the use of treatments designed to maintain penile tissue health during the period of nerve recovery — not to force erections, but to prevent permanent structural damage to the penis that would otherwise occur.

When the cavernous nerves are injured, the smooth muscle cells inside the penile erectile tissue (the corpora cavernosa) are deprived of their normal nerve signals. Without regular oxygenation from erection-mediated blood flow, these smooth muscle cells can undergo fibrosis — replacement by scar tissue. Fibrosed tissue cannot expand, which means even when nerve function returns, the erectile tissue may no longer be able to generate a firm erection.

Penile rehabilitation prevents this fibrosis through regular low-dose PDE5 inhibitor therapy (maintaining penile oxygenation) and possibly vacuum erection devices (mechanically drawing blood into the erectile tissue).

Treatments that help

PDE5 inhibitors (sildenafil, tadalafil, vardenafil)

These are the first-line treatment. They work by relaxing smooth muscle in the penile arteries, allowing more blood to flow in during arousal. For rehabilitation, low-dose tadalafil (5 mg daily) is commonly prescribed from 4–6 weeks post-surgery, continued for 12–18 months. On-demand higher doses (sildenafil 50–100 mg, tadalafil 10–20 mg) are used for sexual activity.

Vacuum erection device (VED)

A cylinder placed over the penis creates negative pressure that draws blood into the erectile tissue. Used 1–2 times daily for 10–20 minutes, independently of sexual activity. Mechanically oxygenates the erectile tissue. Most effective when combined with PDE5 inhibitors. Results in erections that are adequate for penetration but not warm (as with normal erection) — the ring at the base maintains the erection.

Intraurethral alprostadil (MUSE)

A small medicated pellet inserted into the urethra dissolves and is absorbed into the erectile tissue, causing smooth muscle relaxation and erection. Effective in about 40–65% of post-prostatectomy men. Causes a burning sensation in some. An option for men who cannot take PDE5 inhibitors (e.g., those on nitrates).

Intracavernosal injection (ICI)

Injection of alprostadil (or a combination of vasoactive agents) directly into the side of the penis using a fine needle. Highly effective — produces erections in 80–90% of post-prostatectomy men regardless of nerve-sparing status. The injection is smaller than an insulin needle and most men report minimal discomfort after the first few attempts. Taught by a nurse specialist in clinic.

Penile implant (inflatable penile prosthesis)

For men who have not regained satisfactory erectile function by 18–24 months and want penetrative sexual activity. A three-piece inflatable device implanted surgically — widely considered the gold standard for men with permanent erectile dysfunction after prostatectomy. Patient satisfaction rates exceed 90% in published series.

Orgasm and ejaculation after surgery

Ejaculation: After prostatectomy, there is no ejaculate. The seminal vesicles (which produce most of seminal fluid) and the prostate (which adds further fluid) are removed. Orgasm itself — the sensation — is preserved in most men through intact pudendal nerve function. However, "dry orgasm" takes adjustment. Some men find the sensation of orgasm is altered, particularly in the months immediately after surgery.

Climacturia: Some men experience urine leakage at the point of orgasm. This occurs in about 20–40% of post-prostatectomy men, is more common early in recovery, and tends to improve over time. Pelvic floor exercises help. Partners are best prepared for this in advance — simple open communication removes any anxiety around it.

Orgasm quality: Most men report orgasm returns to baseline quality once erections recover, though some describe a changed quality of sensation early in recovery. This typically improves with time.

Supporting your relationship through recovery

The psychological and relational impact of post-prostatectomy sexual dysfunction is real and significant. Partners are affected equally. Open, honest communication about expectations and timelines is more valuable than any treatment.

Key points for couples:

• Intimacy does not require penetration. Physical closeness, touching, and mutual engagement during recovery are valuable and should not be abandoned while erections are recovering.
• Set realistic shared expectations. Recovery takes 12–24 months — both partners need to understand this.
• Seek psychological support if needed. Many cancer centres offer couple counselling or psychosexual services alongside urological care.
• Start rehabilitation early and persist with it. Men who give up at 6 months and wait passively for erections to return miss the critical window of rehabilitation benefit.