Priapus Shot Therapy: What It Treats vs. What It Can’t Deliver

Introduction: Two Different Goals, Two Different Treatments

Picture a man in his late 30s. He has built a successful career, made smart decisions with his money, and rarely settles for anything less than the best option available. Lately, something has been quietly nagging at him. Maybe it is a change in performance. Maybe it is a longstanding concern about size that he has never voiced to anyone. He starts researching, and one term keeps surfacing: the Priapus Shot, or P-Shot. The question he keeps returning to is simple: will it actually deliver what he wants?

Here is the honest answer that most content online refuses to give directly. The P-Shot is a legitimate, clinically studied regenerative therapy. But it was designed to restore erectile function, not to deliver measurable, visible girth enhancement. Those are two entirely different goals, and they require two entirely different tools.

The confusion between them is widespread and understandable, largely because of how the P-Shot is marketed across the internet. This article offers an evidence-graded evaluation of what Priapus Shot therapy can and cannot deliver, along with a clear explanation of what the clinical evidence actually supports for men whose primary goal is girth. Two treatment categories are compared throughout: PRP-based regenerative therapy (the P-Shot) and hyaluronic acid filler-based volumetric enhancement. No hype, just precision.

What Is Priapus Shot Therapy? A Clinical Overview

The P-Shot is a platelet-rich plasma (PRP) injection procedure. Blood is drawn from the patient, spun in a centrifuge to concentrate platelets and growth factors, and then injected into penile tissue. The biological goal is regenerative: PRP stimulates tissue repair, promotes neovascularization (the formation of new blood vessels), and supports regeneration of smooth muscle and nerve tissue within the corpus cavernosum.

Understanding the branding is worth a moment, because it signals legitimacy. Priapus Shot® and P-Shot® are federally registered service marks, a fact confirmed by a JAMA Network Open correction in 2022, with proprietary protocols developed by Dr. Charles Runels. This is not a generic procedure any provider can improvise.

On regulatory status, an important nuance applies. The FDA does not approve medical procedures; it clears the centrifuge devices used to prepare PRP. The procedure itself is classified as experimental or off-label by major U.S. bodies, including the American Urological Association (AUA) and the Sexual Medicine Society of North America (SMSNA). PRP does have an established scientific foundation, however. It is FDA-approved for bone grafts and has been used off-label for wound healing, musculoskeletal injuries, and urinary incontinence.

The treatment experience is straightforward: an outpatient visit, typically under an hour, involving a blood draw and targeted injections. No cutting, no general anesthesia. Cost generally runs $1,200 to $3,000 per session with no insurance coverage, and multi-session protocols can exceed $5,000 annually.

What the Clinical Evidence Actually Shows for Erectile Dysfunction

For a professional who values data, the evidence here is genuinely encouraging. A 2025 meta-analysis published in The Aging Male analyzed seven randomized controlled trials covering 660 patients. It found that PRP significantly improved International Index of Erectile Function (IIEF) scores at 12 weeks (p=0.03) and 24 weeks (p=0.0004) compared to controls.

The landmark study in this space is the Poulios et al. (2021) double-blind, randomized, placebo-controlled trial, the first of its kind. In it, 69% of PRP-treated men achieved a minimal clinically important difference (MCID) in IIEF scores at six months, versus 27% in the control group. The Shaher et al. (2023) RCT reinforced this finding: 72% of PRP-treated men achieved MCID at three months, compared to just 16% in the saline placebo group. A separate 2024 PLOS One meta-analysis, spanning 12 controlled trials and 991 patients, likewise concluded that PRP outperformed control treatment on erectile function scores.

Intellectual honesty requires context. While these results are statistically significant, most studies remain small, and PRP preparation protocols vary widely from clinic to clinic. That variability is precisely why major bodies still classify the therapy as experimental. The SMSNA’s updated 2025 position statement on regenerative therapies, released at its April Annual Scientific Program at the AUA, maintains that PRP remains a debated experimental therapy best delivered within clinical research protocols. The European Association of Urology similarly acknowledges a possible mild improvement in erectile function but considers the evidence insufficient for a formal recommendation.

The honest takeaway: the evidence is promising and growing, with roughly 60 to 70% of men reporting some improvement in erectile function. This is a therapy for restoring function, not for cosmetic volumetric enhancement.

Who Is the Ideal Candidate for Priapus Shot Therapy?

The men most likely to benefit share a clinical profile: mild to moderate erectile dysfunction, reduced penile sensitivity, or early-stage Peyronie’s disease.

One particularly motivated group is PDE5i non-responders, men who have already tried Viagra or Cialis without success. One clinical study showed PRP can transform non-responders into responders when combined with daily tadalafil and on-demand vardenafil. Post-prostatectomy ED is another emerging indication, as PRP may support cavernous nerve regeneration and penile tissue health following radical prostatectomy, a meaningful option for a high-suffering patient population. For Peyronie’s disease, a 2025 study of 72 participants found PRP injections helped reduce penile curvature and plaque buildup, and the University of Miami randomized controlled trial (NCT04512287), completed in August 2025, is expected to add significant data.

Just as important is knowing who is not a good candidate: men with severe vasculogenic ED, blood disorders affecting platelet function, active infections, or men whose primary goal is visible, measurable girth enhancement. Unrealistic expectations about size are a genuine contraindication, not because the procedure is unsafe, but because PRP’s mechanism is regenerative, not volumetric. For men whose ED has a confidence or self-perception component tied to size, a different treatment category may be the better answer.

The Combination Therapy Advantage: When the P-Shot Works Best

The strongest emerging evidence for PRP is not as a standalone therapy but within combination protocols. Pairing PRP with low-intensity shockwave therapy (Li-SWT) has shown synergistic benefits in Italian studies, with extended positive effects on ED compared to either therapy alone. The 2025 meta-analysis in The Aging Male specifically evaluated PRP alone or combined with Li-SWT across seven RCTs, and combination protocols showed enhanced outcomes.

Structured protocols are emerging as well. The “STUD Protocol” at Comprehensive Urology in Los Angeles is an active clinical study combining PRP with shockwave therapy specifically for penile girth enhancement, one of the few structured protocols targeting that outcome. Combinations with vacuum erection devices and PDE5 inhibitors are also increasingly studied.

The practical lesson for a discerning patient: top clinics increasingly offer multi-modal protocols rather than PRP alone. Anyone evaluating Priapus Shot therapy should ask specifically about the full protocol being offered, not just the injection itself.

The Critical Distinction: What Priapus Shot Therapy Cannot Deliver

Here is the core clinical distinction stated plainly: PRP is a regenerative therapy designed to restore tissue function. It is not a volumetric filler and does not mechanically add measurable girth.

So why do so many men conflate the two? Marketing language around the P-Shot often references “enhancement,” “growth,” or “size improvement,” which creates misleading expectations. Some men report modest gains of 1 to 1.5 inches in length and marginal girth improvements after multiple sessions, but these outcomes are highly variable, not robustly supported by controlled trials, and secondary to PRP’s primary regenerative function.

The mechanism gap explains everything. PRP stimulates tissue remodeling over weeks to months. Any size changes are indirect and inconsistent, never the result of deliberate volumetric displacement. No peer-reviewed RCT has established PRP as a reliable, reproducible method for achieving clinically meaningful girth enhancement.

This is not a failure of the P-Shot. It is simply the wrong tool for a specific job, in the same way a cardiac surgeon is not the wrong doctor but the wrong specialist when the problem is orthopedic. So what does the clinical evidence support for men whose primary goal is visible, measurable girth?

The Right Treatment for Girth: Hyaluronic Acid Filler-Based Volumetric Enhancement

Hyaluronic acid (HA) filler-based penile girth enhancement is a fundamentally different treatment category with a fundamentally different mechanism: physical volume displacement, not tissue regeneration.

The process is direct. Medical-grade hyaluronic acid filler is precisely injected beneath the penile skin to add immediate, measurable girth. Results are visible the same day. This approach has clinical backing: the World Journal of Men’s Health (2022) published a prospective, patient- and evaluator-blinded, randomized, active-controlled multicenter RCT evaluating HA filler for penile girth enhancement, establishing genuine clinical legitimacy.

The results profile is the opposite of PRP’s. HA fillers provide immediate girth lasting 6 months to 2 years, while PRP’s girth effects, if any, are gradual, indirect, and secondary. HA also offers a meaningful safety advantage: it is dissolvable with hyaluronidase, something synthetic or permanent fillers cannot match. That distinction matters. August 2025 clinical case reports documented foreign body granuloma after polylactic acid (PLA) filler injections, two of which required surgical removal, underscoring why filler selection and provider expertise are critical.

For men whose primary goal is visible, measurable, and immediate girth improvement, HA filler enhancement is the clinical gold standard.

What to Expect from HA Filler-Based Girth Enhancement at Stoller Medical Group

For men in this category, Stoller Medical Group (operating as Penis Enlargement New York City) brings deep specialization, with over 15,000 enlargement procedures performed.

The procedure is non-surgical, outpatient, and completed in under an hour, with no cutting and no general anesthesia. It uses Belefil®, a hyaluronic acid-based, medical-grade dermal filler. The practice employs a staged treatment approach, using multiple sessions rather than one dramatic procedure. This improves symmetry, reduces risk, and produces smoother, more natural outcomes.

On pricing, the practice is transparent: treatment starts at $7,500 and increases depending on desired results. Pricing is by syringe, with most men starting at a minimum of 10 syringes and averaging 15 syringes during their first procedure.

The results profile is strong: immediate visible enhancement, 80 to 90% permanent improvement in girth and volume, results lasting 18 to 24 months, and a natural appearance and feel in both flaccid and erect states. Recovery is fast, with most men back on their feet in 10 days (compared to 40-plus days with other permanent fillers) and sexual activity resumable within 7 to 10 days. Follow-up is typically scheduled 2 to 3 months after the initial treatment, with optional periodic touch-ups for maintenance.

The practice operates five locations (Manhattan, Long Island, Albany, Pennsylvania, and Minnesota) and offers free consultations. Dr. Roy B. Stoller is a board-certified physician with 25-plus years in aesthetic and restorative medicine and 5 years dedicated specifically to non-surgical male enhancement.

Side-by-Side Comparison: Priapus Shot Therapy vs. HA Filler Girth Enhancement

These treatments are not mutually exclusive. Men with both ED and girth goals may benefit from a combination approach, best addressed in a personalized consultation.

Understanding the Risks: An Honest Assessment of Both Treatment Categories

For the P-Shot, common side effects are mild: temporary pain, bruising, and swelling at injection sites. More serious but rare risks include infection, scarring, nerve damage, priapism (prolonged erection), and potential deformity. A meaningful safety advantage is that PRP uses the patient’s own blood, which eliminates the risk of allergic reaction or foreign body response.

For HA fillers, the most important risk factor is provider expertise and filler selection. The August 2025 case reports of granulomatous reactions after PLA-based fillers, some requiring surgical removal, illustrate why HA fillers (dissolvable) carry a fundamentally different risk profile than permanent synthetic fillers. Knowledge of vascular anatomy is essential, because improper injection technique can cause vascular occlusion. Provider selection is not optional.

Stoller Medical Group uses hospital-grade sterility protocols and medical-grade biocompatible materials, and it deliberately does not offer surgical penile lengthening because of the higher risk profile, a clear signal of a safety-first philosophy. With the global ED treatment market growing from $2.68 billion in 2025 toward $4.06 billion by 2030, providers of widely varying quality have entered the space. Due diligence matters.

Frequently Asked Questions About Priapus Shot Therapy and Girth Enhancement

Can the P-Shot make a penis bigger? PRP is not designed for girth enhancement. Some men report modest, variable size changes, but these are not reliably reproducible and are not PRP’s primary mechanism. For measurable girth results, HA filler-based treatment is the evidence-supported option.

Is the P-Shot FDA-approved? The FDA does not approve medical procedures. The centrifuge devices used to prepare PRP must be FDA-cleared, but the procedure itself is classified as experimental or off-label by the AUA and SMSNA.

How many P-Shot sessions are needed? Most protocols involve 2 to 3 sessions; combination protocols with shockwave therapy may require additional sessions. Results are claimed to last 12 to 18 months.

What does HA filler girth enhancement cost? At Stoller Medical Group, treatment starts at $7,500 and increases depending on desired results. Pricing is by syringe, with most men starting at a minimum of 10 syringes and averaging 15 syringes during their first procedure.

Can a man have both the P-Shot and HA filler treatment? Yes. These treatments are not mutually exclusive. Men with both ED and girth goals may benefit from a combination approach, best evaluated in a personalized consultation.

Who should not get the P-Shot? Men with severe vasculogenic ED, blood disorders affecting platelet function, active infections, or men whose primary goal is visible girth enhancement are not good candidates.

How does someone know if a P-Shot provider is legitimate? Priapus Shot® and P-Shot® are federally registered service marks with licensed provider protocols. Patients should ask whether the provider is a licensed P-Shot provider under the official protocol.

Conclusion: Matching the Right Treatment to the Right Goal

Priapus Shot therapy is a legitimate, clinically supported regenerative treatment for erectile dysfunction, and the evidence for that specific indication is growing meaningfully. The 2025 meta-analysis data showing statistically significant IIEF improvements deserves to be stated with confidence.

Equally, for men whose primary goal is visible, measurable, and immediate girth enhancement, PRP is the wrong treatment category. The mechanism simply does not align with the goal. Both goals are entirely valid. Wanting to restore erectile function and wanting to enhance girth are understandable objectives; they simply require different clinical tools. Some men have both goals, and only a personalized consultation can determine the right protocol, or combination of protocols, for their anatomy and objectives.

The men who achieve the best outcomes are those who approach this decision with accurate information, realistic expectations, and a qualified provider who prioritizes their specific goal over a one-size-fits-all protocol. With the global sexual wellness market valued at $51.17 billion in 2025 and growing, the options have never been more sophisticated, which makes informed decision-making more important than ever.

Ready to Find Out Which Treatment Is Right for You?

For men whose primary goal is girth enhancement, Stoller Medical Group is the appropriate next step, with over 15,000 procedures performed, Dr. Roy B. Stoller’s 25-plus years of experience, and a staged, precision-based approach designed to deliver natural, measurable results. A free, no-obligation consultation is the right first move: not a commitment, but an opportunity to receive an honest, personalized assessment of anatomy, goals, and the right treatment protocol.

With five locations across Manhattan, Long Island, Albany, Pennsylvania, and Minnesota, access is straightforward. Schedule a free consultation today and receive a clinical answer, not a marketing promise, about what is actually achievable for specific goals.

Men who make informed decisions get better outcomes. That is true in business, and it is true here.