Pentosan Polysulfate
Elmiron · PPS · SP-54 · Cartrophen
Pentosan Polysulfate (Elmiron) is a highly specialized, semi-synthetic heparinoid structurally similar to the body’s natural mucosal lining. Remaining the only FDA-approved oral weapon against the excruciating pelvic pain of Interstitial Cystitis (IC), it is deployed to literally spackle over and repair profound acid burns within the bladder wall. Additionally, in elite veterinary medicine (Cartrophen), it is injected to massively halt severe arthritic joint degradation.
Use-case scores
0–10 against the evidence we have, not a gym ranking. Hidden domains do not apply here.
- Injury & tissue4/10
Elmiron is FDA-approved for interstitial cystitis. Pigmentary maculopathy is a serious long-term risk. Haircut from 9 because this leaf is identity, not a urology clinic, and the molecule is not a peptide.
Compound card
- Class
- Semi-synthetic sulfated xylan (Elmiron; not a peptide)
- Formula
- C5H8O10SNa (repeating unit - polysaccharide)
- Status
- Not FDA-approved · research use
How it works
Pentosan Polysulfate Sodium (PPS, Elmiron®) is a semi-synthetic polysaccharide derived from beechwood hemicellulose. While not a traditional peptide, it is frequently researched alongside peptide therapies for musculoskeletal and joint conditions. It acts as a glycosaminoglycan (GAG) analog - coating damaged cartilage surfaces, inhibiting proteolytic enzymes (MMPs), reducing chondrocyte death, and stimulating proteoglycan production. FDA-approved for interstitial cystitis since 1996. Off-label veterinary use for equine and canine osteoarthritis is extensive. Recent research into human joint injection protocols is ongoing.
Source: PMID: 2206774
Research Use Cases
- ✓Interstitial Cystitis: High
- ✓Osteoarthritis / Joint Repair: Moderate
Dosing
| Phase | Dose | Frequency | Notes |
|---|---|---|---|
| Oral (FDA-approved IC) | 100 mg | Three times daily (oral, on empty stomach) | Elmiron protocol for interstitial cystitis. 3-6 months to assess response. |
| IM/SC (Joint Research) | 1-3 mg/kg | Once or twice weekly (IM) | Off-label joint injection research doses (extrapolated from veterinary protocols). |
Administration
Timeline
Who it is for
Interstitial Cystitis
HighFDA-approved (Elmiron). First-line oral pharmacological treatment for IC.
Osteoarthritis / Joint Repair
ModerateGAG-mimetic cartilage protection. Extensive veterinary evidence; human OA trials ongoing.
Safety & Considerations
FDA-approved orally (Elmiron). IMPORTANT: Retinal pigmentary maculopathy linked to chronic high-dose use (>1-3 years). Annual retinal screening recommended for long-term users. Rare aplastic anemia at high doses.
Regulatory & Legal Status
Not currently on the WADA 2026 Prohibited List. Policies may change - verify before competition.
Research Chemical
US Compounding: Not eligible / not available
⚠️ This information is for educational purposes only and may not reflect the most current regulatory updates. Always verify with official FDA, WADA, and jurisdiction-specific sources before use.
Limits of current evidence
- Maculopathy monitoring is on the adult file.
- This site will not treat IC or osteoarthritis from a PPS page.
Verdict
PPS is Elmiron, a polysaccharide, not a peptide. IC label is real. Eye toxicity is real. Joint-injection folklore is not that label.
Interactions & Contraindications
FDA-approved orally (Elmiron). IMPORTANT: Retinal pigmentary maculopathy linked to chronic high-dose use (>1-3 years). Annual retinal screening recommended for long-term users. Rare aplastic anemia at high doses.
Frequently Asked Questions
Is pentosan polysulfate safe for long-term use?▼
Does pentosan polysulfate work for osteoarthritis?▼
References
- Ghosh P, Smith M “"Pentosan polysulfate sodium for OA: review of evidence".” Current Therapeutic Research (2019).
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