PRP Injection for Erectile Dysfunction: What the Evidence Actually Supports

Last updated: August 22, 2026

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Platelet-rich plasma (PRP) injection is marketed to men with erectile dysfunction as a regenerative treatment — sometimes under trade names like the “P-shot” — and the marketing is a good deal more confident than the evidence. This article sets out what PRP is, what the trials genuinely show, and why the major urological guidelines still place it in a different category from the treatments they recommend.

Availability, stated plainly. PRP injection is available at Bangkok Hospital Headquarters. Saying so does not change anything else in this article: it is offered as an investigational option, which means a man considering it should be told openly what the evidence does and does not show before he decides, rather than after. That conversation is the point of this page. Questions about cost are answered by the hospital rather than by Dr. Soarawee — email the Urology department at bhquro@bdms.co.th.

• Urology center Bangkok hospital Thailand Booking online 02-310-3009 bhquro@bdms.co.th
• Samitivej Sriracha hospital Chonburi 088-022-1445

Start Here, Not With an Injection

Erectile dysfunction is a symptom, not a diagnosis, and it is frequently the earliest sign of vascular disease — the same process that affects the coronary arteries often shows up in the smaller penile arteries first, sometimes years earlier. A man who goes straight to a regenerative injection without an assessment may be paying for a procedure while a treatable cause of the problem, and a genuine cardiovascular risk, goes unexamined.

A proper erectile dysfunction assessment looks at cardiovascular risk, diabetes, blood pressure, weight, sleep apnoea, testosterone, current medications, alcohol and smoking, and the psychological side, which is rarely absent. Several of those are reversible. Read more on the four causes behind almost every case of ED.

What PRP Is

PRP is prepared from the patient’s own blood. A sample is spun in a centrifuge, which separates it by density, and the platelet-rich layer is drawn off. Platelets carry growth factors — vascular endothelial growth factor, platelet-derived growth factor, epidermal growth factor, insulin-like growth factor, fibroblast growth factor — which are involved in blood vessel formation, nerve repair and tissue healing throughout the body. The concentrate is then injected into the penile tissue with a fine needle.

That biological rationale is real and it is why the idea is worth studying. But a plausible mechanism is not the same thing as a demonstrated benefit in patients, and this is precisely the gap that regenerative medicine marketing tends to step over. There is also a practical problem that follows from the method: PRP is not a standardised product. Platelet concentration, whether white cells are included, whether the platelets are activated and how many injections are given all differ between clinics, so two men receiving “PRP” may be receiving quite different preparations — and studies of one do not necessarily apply to another.

What the Evidence Actually Shows

Here the honest summary is narrower than the marketing.

• The studies are small and short. The randomised evidence involves modest numbers of men followed for months rather than years. Improvements reported on questionnaire scores have generally been modest, and in placebo-controlled work the placebo groups also improve — which is why uncontrolled before-and-after results in this field are so unreliable.
• Durability is unknown. There is no good long-term data on whether any benefit persists, or how often treatment would need repeating.
• The major guidelines have not adopted it. Both the American Urological Association and the European Association of Urology continue to treat penile PRP as investigational — something that should be offered within a research protocol with proper consent, not as established care. That is a deliberate position, and it has not changed on the strength of the studies published so far.
• Combination claims are weaker still. The idea that PRP plus shockwave therapy produces a dramatically better result than either alone rests on very limited data and should not be presented to patients as established.

An earlier version of this article stated that PRP’s benefit was clinically confirmed and that combining it with shockwave therapy produced dramatic improvement. That overstated what the evidence supports, and it has been corrected. Where the science lands in future, this page will follow it.

Safety: Better Than Most, But Not “No Risk”

Because PRP comes from the man’s own blood, there is no risk of allergy or rejection to the material itself, and the reported safety profile in trials has been reassuring: bruising is common and settles on its own, and serious events have not been a feature of the published studies. But “no serious complications in a few small short trials” is a much weaker statement than “safe”, and any injection into the penis carries risks that belong on the page:

• Bruising and haematoma — common, self-limiting
• Pain at the injection site
• Infection — uncommon, but any injection can introduce it
• Scarring or nodule formation at repeatedly injected sites, which is a theoretical concern with any repeated penile injection and is not something short trials would reliably detect
• The financial risk, which is not trivial: courses of regenerative therapy are usually paid out of pocket and are usually not covered

Get help the same day if any of these happen after any penile injection

• An erection lasting more than four hours, particularly a painful one occurring without arousal — this is priapism and is a true emergency; treatment within the first four to six hours usually resolves it, while delay beyond twenty-four hours makes permanent erectile dysfunction likely
• Spreading redness, swelling, fever or discharge at the injection site
• Bleeding that does not stop with steady pressure, or a rapidly enlarging swelling
• Severe or worsening pain rather than the settling ache expected after an injection

Attend an emergency department, or call 1669 in Thailand. Do not wait for a clinic appointment.

Where PRP Sits Against the Treatments That Are Established

For erectile dysfunction, the treatments with solid evidence behind them are, in rough order of escalation: treating the underlying causes; oral PDE5 inhibitors such as sildenafil and tadalafil — which must never be taken by a man using nitrates for angina, a combination that can cause a dangerous fall in blood pressure; vacuum erection devices; intracavernosal injection therapy; and, for men who have not responded to conservative treatment, a penile implant.

Low-intensity shockwave therapy sits somewhere between the two groups: better studied than PRP, with a plausible signal in men with milder vascular ED, but still with important limits on the strength of that evidence — I have written about it separately in how LI-ESWT is used in erectile dysfunction.

None of this means PRP will turn out to be worthless. It means that today, a man being offered it should be told plainly that it is investigational, that the trials are small and short, that durability is unknown, and what it will cost him. If that conversation is not being had, that in itself tells you something about where you are being treated.

Frequently Asked Questions

Does PRP injection work for erectile dysfunction?

The honest answer is that it is not settled. Small randomised trials have reported modest improvements in questionnaire scores over a few months, but the studies are short, the numbers are small, placebo groups improve too, and there is no reliable long-term data. Both the American Urological Association and the European Association of Urology continue to classify penile PRP as investigational — appropriate within a research protocol rather than as established treatment. It should not be presented as a proven cure.

Is PRP injection for erectile dysfunction safe?

The reported safety profile is reassuring as far as it goes. Because the material is the man’s own blood there is no risk of allergy or rejection to it, bruising is the common side effect and settles by itself, and serious events have not been a feature of the published trials. But those trials are small and short, so the evidence supports “no serious harm seen so far” rather than “safe”. Any penile injection can cause bleeding, infection or, with repetition, scarring. An erection lasting more than four hours after any penile injection is an emergency.

How many PRP sessions would be needed?

There is no agreed protocol, which is part of the problem. Session numbers, platelet concentration, whether white cells are included and whether the platelets are activated all vary between clinics, so “PRP” is not one standard treatment. Any clinic quoting a fixed number of sessions with a promised result is going beyond the evidence.

Is PRP better combined with shockwave therapy?

That claim is made often and rests on very limited data. It is a reasonable research question and not an established fact, and a man should not be charged for a combined course on the basis of it.

What should I do before considering any regenerative treatment for ED?

Get assessed. Erectile dysfunction is frequently the first sign of vascular disease, and a cardiovascular risk review, along with checks for diabetes, blood pressure, testosterone, sleep apnoea, medication effects and the psychological side, comes before choosing any therapy. Several causes are reversible, and treatments with strong evidence exist. A regenerative injection bought before that assessment can leave the actual problem undiagnosed.

Book an Appointment

Dr. Soarawee Weerasopone sees men’s health patients at Bangkok Hospital Headquarters and at Samitivej Sriracha Hospital, Chonburi — Urology department 088-022-1445. Questions about the availability or cost of any treatment are answered by the hospital rather than by Dr. Soarawee — for Bangkok Hospital, by email to bhquro@bdms.co.th.

Bangkok Hospital Telemedicine is available for patients who cannot attend in person, including international patients — arrange it in advance by email to the Urology department at bhquro@bdms.co.th. Samitivej Sriracha is in-person only.

Disclaimer: This article is written and reviewed by Dr. Soarawee Weerasopone, a board-certified urologist at Bangkok Hospital Headquarters. It is educational only, is not medical advice, and does not create a doctor–patient relationship. Describing a treatment here is not an offer of that treatment, and availability differs between countries and hospitals. No diagnosis, prescription or individual medical advice is given through personal messaging channels or social media, and Dr. Soarawee operates no public social media account — any account offering private consultation in his name is fraudulent. If you have an erection lasting more than four hours, severe pain, fever, or any other urgent symptom, go to an emergency department or call 1669 in Thailand.