PeniMaster PRO penile traction device,
does it really help with Reduction of erect curvature in stable Peyronie's disease?
research showsThe grade is C with 50 points. Among completers, curvature fell from 72.3 to 41.1 degrees with traction, a 31.2-degree reduction, while the no-intervention group changed from 68.7 to 66.3 degrees. Erect angle is a surrogate and the trial was small and completer-only.
ads claimPenile traction devices are sold online in South Korea. Direct applicability is limited to stable unidirectional curvature of at least 45 degrees without erectile dysfunction or significant pain.
Useful facts when choosing a product
- PeniMaster PRO is an MSP Concept trade name using vacuum glans fixation and rod traction.
- Mean adherence was 5.2 hours per day, a substantial burden.
- Local discomfort or glans numbness occurred in 43%; two men with glans edema and one with overstretching pain discontinued. Removal every two hours was advised to reduce tissue injury.
Chamgap Semantic Classification Code
Candidate index · review held
P.penimaster-pro-penile-traction-device.device.erect-curvature-in-stable-peyronies-disease.reduce.MULTIProcedures, devices and tests > PeniMaster PRO penile traction device > Device delivered > erect curvature in stable Peyronie's disease > Reduction claim > Multiple: primary unresolved
An automated migration candidate, not an issued permanent code; exact claim scope remains under review. This machine-generated migration candidate helps retrieval but is not a permanent assignment. The original verdict ID and URL remain authoritative.
What the research actually shows
Six hospitals randomized 93 men to traction for 3 to 8 hours daily or no-intervention observation. Device blinding was impossible, but "Patients were assessed by an independent examiner in every centre who was blind to the assignment group", so an unblinded subjective endpoint does not apply. A no-treatment control was feasible and was used. Limitation 1: small study (total under 200). Listed item: 93 participants. Avoidability: possible - multicenter recruitment could have exceeded 200. Limitation 2: completer analysis. Listed item: only 80/93, 41 versus 39, completed and entered efficacy analysis. Avoidability: possible - all 93 could have been included in ITT with missing-data sensitivity analyses. Substantial attrition (>=15%) was 13/93 (14.0%), below threshold. Short duration (<12 weeks) does not apply because follow-up was 12 weeks. The conflict statement says, "Penimaster PRO was provided free of cost to all patients", without naming the provider. Confirmed in-kind study devices prevent an independent-funding classification.
Why this is classified as C (50)
Erect curvature is a surrogate that caps the grade at C. A blinded examiner and large short-term change are balanced against 93 participants, completer-only efficacy analysis, and free branded devices, giving C with 50 points.
Counterpoint. The trial did not establish durable benefit or definite improvement in penetration or avoidance of surgery.
Rejudgment record. New verdict — Blinded curvature measurement and a large short-term change, but 93 participants, 80 completers, and free branded study devices
| Endpoint | S | Surrogate marker - laboratory or imaging measures |
| Replication | R1 | Single confirmatory trial |
| Independence | I1 | Mixed funding sources |
| Effect size | E+ | Meets the clinically important threshold |
Stored derived and displayed grades match; this is not a current recalculation or validity check (C).
Sub-claim grades by effect
This ingredient is marketed for several effects. A single overall grade blends strong and weak claims together, so each effect is graded separately here. The overall grade reflects the strongest disconfirming or core claim.
| Effect (sub-claim) | Grade | Basis |
|---|---|---|
| Reduction in erect curvature at 12 weeks | C | Mean curvature fell by 31.2 degrees. |
| Improved erectile function | D | IIEF-EF did not significantly differ from control. |
Cross-check — AI research and Codex final gate
Evidence Table
| Study | Design | Sample | Funding | Endpoint | Result | Weight |
|---|---|---|---|---|---|---|
| Moncada I et al. 2019 | Multicenter randomized open no-treatment-controlled trial with blinded assessors | 93 randomized; completer efficacy analysis 80 (41/39) | PeniMaster PRO supplied free to all patients; provider not named | Change in goniometric curvature during alprostadil-induced erection | Traction fell from 72.3 to 41.1 degrees, a 31.2-degree reduction; no intervention changed from 68.7 to 66.3 degrees | Pivotal single surrogate-endpoint trial |
Receipt — 1 References
All 1 cited sources were verified for existence at the original page (as of 2026-08-18).
Final verification and publication gate: Codex · Evidence date: 2026-08-18 · Corrections: none
Cite this verdict
[Chamgap] PeniMaster PRO Penile Traction Improves Erect Curvature in Stable Peyronie's Disease - Benefit — Evidence Grade C·50. 1 cited sources checked. Source: https://chamgap.com/en/verdicts/mens/penimaster-pro-traction-stable-peyronie-erect-curvature/ · CC BY 4.0CC BY 4.0 — free to use with attribution; do not distort grades, numbers, or verdict meaning.
What this document does and does not do
Chamgap is an information source. It reports what research has and has not confirmed; it does not tell readers what to take or buy. That decision belongs to readers and, when needed, medical or legal professionals. This verdict reflects literature available up to the search date and may change as new research appears. Nothing here is medical advice.