Prostate removal does cause erectile dysfunction in the majority of men, at least temporarily. In a large outcomes study, about 60% of men were still impotent 18 months or more after surgery. However, the actual risk varies enormously depending on surgical technique, the surgeon’s skill, your age, and how well your erections worked before the operation. Reported rates of lasting erectile dysfunction range from as low as 12% to as high as 96% across different studies and settings.
Why Surgery Affects Erections
The prostate sits directly next to two bundles of nerves that control erections. These nerves run along either side of the prostate and send the signals that trigger blood flow into the penis. During surgery to remove the prostate, these nerve bundles can be stretched, bruised, or cut entirely.
Even when a surgeon carefully preserves those nerves, the trauma of the operation reduces their ability to produce the chemical signal (nitric oxide) that relaxes the smooth muscle tissue inside the penis and allows it to fill with blood. Without that signal, erections weaken or stop altogether. Over time, the lack of blood flow causes a cycle of oxygen deprivation and scarring inside the erectile tissue itself, which can make the problem harder to reverse the longer it persists.
How Much Nerve-Sparing Matters
The single biggest surgical factor is whether your surgeon preserves the nerve bundles on one side, both sides, or neither. Bilateral nerve-sparing surgery, where both bundles are left intact, produces dramatically better outcomes. At 12 months, men who had both nerve bundles preserved during robotic surgery recovered erections at rates between 24% and 97%, compared to just 14% to 61% when only one side was spared.
Not every man is a candidate for nerve-sparing surgery. If the cancer has grown into or very close to the nerve bundles, removing them may be necessary for a complete cure. Your surgeon makes this judgment based on imaging, biopsy results, and what they find during the operation itself.
The Recovery Timeline
Nearly all men experience erectile dysfunction immediately after prostate removal. The relevant question is how many recover over time, and how long it takes. Nerve healing is slow. Most studies exclude any data collected less than 12 months after surgery because meaningful recovery hasn’t had time to occur yet.
Studies with follow-up periods of 18 months or longer report slightly higher recovery rates (around 60%) than those with shorter follow-up (around 56%), suggesting that erections continue to improve well into the second year. Most experts consider the recovery window to extend out to about 24 months. After that point, whatever function you have is generally what you’ll keep without additional intervention.
Factors That Predict Your Outcome
Your chances of recovering erections depend heavily on factors you bring into the operating room. The most important predictors are:
- Age: Younger men recover at significantly higher rates. Each additional year of age slightly reduces the odds of regaining function.
- Baseline erectile function: Men who had strong erections before surgery are far more likely to recover them afterward. Men who already had some degree of erectile difficulty tend to have worse outcomes and, notably, also tend to have more aggressive cancers with higher tumor volumes.
- Overall health: Diabetes, cardiovascular disease, and other conditions that affect blood flow reduce your chances of recovery. Men with lower erectile function before surgery have higher rates of diabetes and more coexisting health conditions.
- Surgical technique: Bilateral nerve-sparing surgery is the strongest surgical predictor of recovery. Robotic-assisted surgery may offer a modest advantage over open surgery, though the evidence is still evolving.
Rehabilitation After Surgery
Starting treatment for erectile dysfunction early after surgery, rather than waiting to see if function returns on its own, produces significantly better outcomes. The goal of penile rehabilitation is to maintain blood flow and oxygen delivery to the erectile tissue, preventing the scarring cycle that makes dysfunction permanent.
Oral medications like sildenafil (commonly known by brand names like Viagra) are the most widely used first step. In one study, men who took sildenafil nightly for 36 weeks after surgery were nearly seven times more likely to regain normal spontaneous erections compared to men who took a placebo (27% versus 4%). Starting the medication immediately after catheter removal, rather than waiting three months, also improved the odds of full recovery at one year. Daily dosing appears to outperform taking the medication only before sexual activity, particularly for men with moderate pre-surgical risk factors. One study found 74% of these men benefited from daily therapy versus 52% on an as-needed schedule.
Penile injections are another option, particularly for men who don’t respond to oral medications. In one early trial, men who self-injected a medication called alprostadil three times weekly for 12 weeks recovered spontaneous erections sufficient for intercourse at rates of 67%, compared to just 20% of men who received no treatment. Alprostadil injections have efficacy rates up to 80% as a standalone treatment.
Vacuum erection devices, which use suction to draw blood into the penis, serve a dual purpose: they help with sexual activity in the short term and may preserve penile length during the recovery period. In one study, 97% of men who used a vacuum device daily for 90 days after catheter removal maintained their pre-surgical penile length.
Prostate Removal Versus Radiation
For men with localized prostate cancer weighing their treatment options, the impact on sexual function differs meaningfully between surgery and radiation. At three years, men who had their prostate surgically removed reported significantly worse sexual function than men treated with external beam radiation therapy or those on active surveillance (monitoring without immediate treatment). On a 100-point sexual function scale, surgical patients scored about 12 points lower than radiation patients and about 16 points lower than men under active surveillance. Surgery also carried a greater risk of urinary incontinence. Radiation has its own side effects, including bowel problems, but it tends to preserve erectile function better in the medium term.
When Other Treatments Don’t Work
For men whose erectile dysfunction doesn’t respond to medications, injections, or vacuum devices, a penile implant is the most definitive solution. These surgically placed devices allow a man to produce an erection mechanically. Among the broader population of men who receive implants, satisfaction rates are remarkably high: 93% report high satisfaction in large studies, and the rates are even better (around 97%) when no major surgical complication occurs. When compared head-to-head with medications and vacuum devices, implants consistently produce the highest patient satisfaction of any erectile dysfunction treatment. Major complications, including infection, erosion, or mechanical failure, occur in roughly 9% of cases, and men who experience these are significantly less likely to be satisfied.
Implants are considered after first and second-line treatments have failed or proven unacceptable. For men whose nerve damage from prostatectomy is too severe for other approaches, they represent a reliable path back to sexual function.