EErectile Dysfunction Treatment
Injection Therapy for Erectile Dysfunction
When ED pills don't work, or can't be taken, most men assume they've run out of options. They haven't. Injection therapy produces reliable erections in the large majority of men, including many who get no response from oral medication at all — and it's far less daunting in practice than it sounds on paper. Texas Regional Urology provides injection therapy with in-office training at our offices in The Woodlands, Tomball, and Kingwood.
How It Works
What Is Injection Therapy?
Injection therapy delivers medication directly into the erectile tissue of the penis using a very fine needle. The medication relaxes the smooth muscle and widens the arteries, allowing blood to fill the erectile chambers and produce an erection.
The critical difference from oral medication is that it does not depend on the nerve signaling pathway that pills rely on. PDE5 inhibitors like sildenafil amplify a signal your body produces during arousal — if that signal is weak or the pathway is damaged, there's little to amplify. Injected medication acts on the blood vessels directly, which is why it works for men whose nerves have been affected by diabetes, pelvic surgery, or prostate cancer treatment.
Several medications are used, alone or in combination, and the dose is individualized. Your first injection is performed in our office so we can find the right dose and confirm your response safely. Learn more about erectile dysfunction.
The critical difference from oral medication is that it does not depend on the nerve signaling pathway that pills rely on. PDE5 inhibitors like sildenafil amplify a signal your body produces during arousal — if that signal is weak or the pathway is damaged, there's little to amplify. Injected medication acts on the blood vessels directly, which is why it works for men whose nerves have been affected by diabetes, pelvic surgery, or prostate cancer treatment.
Several medications are used, alone or in combination, and the dose is individualized. Your first injection is performed in our office so we can find the right dose and confirm your response safely. Learn more about erectile dysfunction.
Why Men Choose It
Benefits of Injection Therapy
Works When Pills Don't
Effective for a large majority of men, including those with nerve damage, diabetes, or a history of prostate cancer treatment.
Reliable and Predictable
Response is consistent once the dose is established, and it doesn't depend on timing around food or arousal in the way pills do.
Fast Onset
Erection typically develops within five to twenty minutes.
No Systemic Drug Interactions
Because the medication acts locally, it avoids the interactions that make PDE5 inhibitors unsafe for men taking nitrates.
Avoids Surgery
For many men, injection therapy provides what they need without proceeding to a penile implant.
Who Qualifies
Am I A Candidate?
Injection therapy is appropriate for men with ED who haven't responded adequately to oral medication, who can't take PDE5 inhibitors — men on nitrates, in particular — or who prefer it. It's frequently used after prostate cancer treatment, both to restore function and as part of penile rehabilitation.
Certain conditions require caution or make it unsuitable: bleeding disorders, some blood conditions that predispose to prolonged erections, significant penile scarring or Peyronie's disease, and dexterity or vision limitations that would make self-injection unsafe. Men on blood thinners can often still use it with appropriate care.
The real prerequisite is willingness to try. Most men are apprehensive at the first visit and find the reality far less unpleasant than anticipated — the needle is very fine and the tissue is not especially sensitive to it.
Certain conditions require caution or make it unsuitable: bleeding disorders, some blood conditions that predispose to prolonged erections, significant penile scarring or Peyronie's disease, and dexterity or vision limitations that would make self-injection unsafe. Men on blood thinners can often still use it with appropriate care.
The real prerequisite is willingness to try. Most men are apprehensive at the first visit and find the reality far less unpleasant than anticipated — the needle is very fine and the tissue is not especially sensitive to it.
Recovery Time
What to Expect
Evaluation First
Before starting, we evaluate what's causing your ED — including testosterone, blood sugar, and cardiovascular risk factors. ED is often the first sign of a treatable underlying condition, and that shouldn't be skipped past.
Your First Injection
The first dose is given in our office. We'll demonstrate the technique, you'll perform an injection with guidance, and we'll observe your response to find the right dose. This visit takes longer than a routine appointment.
Learning the Technique
You'll be taught where to inject, how to rotate sites, how to prepare the dose, and how to store the medication. Written instructions go home with you.
At Home
Most men inject before planned sexual activity, with an erection developing within five to twenty minutes. There is a limit on how often injections should be used per week, which we'll specify.
Follow-up
We'll see you to review how it's working, adjust the dose if needed, and check for any developing scarring at injection sites.
Risks & Side Effects
Side Effects
Priapism — Know This One
An erection lasting more than four hours is a medical emergency. Prolonged erection deprives the tissue of oxygen and can cause permanent damage if untreated. If an erection lasts beyond four hours, seek emergency care immediately — do not wait to see if it resolves. Correct dosing makes this uncommon, which is why the first dose is given under observation.
Pain or Aching
Some men experience aching at the injection site or in the penis, often improving as they become accustomed to the technique.
Bruising
Small bruises at injection sites are common, particularly early on.
Scarring
Repeated injections can cause fibrous scarring or curvature over time. Rotating sites reduces this, and we monitor for it at follow-up.
Dizziness or Low Blood Pressure
Uncommon, and generally related to dose.
Answers to your Injection Therapy Questions
Frequently Asked Questions
Less than men expect.
The needle is very fine and the tissue isn't especially sensitive to it, so most men report a brief pinch at most. Apprehension beforehand is usually worse than the experience.
Very — the large majority of men respond
Injection therapy produces usable erections for most men who try it, including many who got nothing from pills. Dose is adjusted individually to get the right result.
Typically five to twenty minutes.
Onset is faster and more predictable than oral medication and doesn't depend on food timing. Duration varies with dose and medication.
Over four hours is an emergency.
Seek emergency care immediately rather than waiting it out, as prolonged erection can permanently damage the tissue. Proper dosing makes this uncommon.
No — there's a weekly limit.
Injections should be spaced to allow tissue recovery and reduce scarring risk, and we'll give you a specific limit. Rotating injection sites also matters.
Partners can be trained too.
Men with dexterity or vision limitations often have a partner perform the injection after training. If that isn't workable, other treatments including a penile implant may suit better.
Pills not working?
Schedule a confidential consultation.
There are effective options beyond oral medication, and pill failure is a reason to see a urologist rather than a dead end.
