Pentosan Polysulfate
Also known as: PPS, Elmiron (oral formulation), Cartrophen (veterinary formulation)
A semi-synthetic polysulfated xylan with anti-inflammatory, anti-thrombotic, and chondroprotective properties. FDA-approved for interstitial cystitis (oral form, Elmiron) and widely used for osteoarthritis in veterinary medicine. Research suggests potential benefits for joint cartilage preservation and synovial fluid enhancement.
Research Status
Extensive Clinical Data
For research purposes only. Not approved for human use. Not medical advice.
Research Areas
Side Effects
Mild redness, swelling, or bruising at the injection site is common and typically resolves within 24-48 hours. Rotate injection sites to minimize tissue trauma. Apply ice for 5-10 minutes post-injection if needed.
More common with oral formulation (Elmiron). With subcutaneous injection, GI effects are uncommon. Take with food if nausea occurs. Discontinue if severe.
Mild headaches have been reported in clinical trials. Usually self-resolving. Ensure adequate hydration.
Rare cases of reversible alopecia have been reported with oral Elmiron, particularly with prolonged use. Mechanism unclear. Discontinue if significant hair loss occurs and consult a healthcare provider.
Pentosan polysulfate has mild anticoagulant properties. Increased bruising or bleeding (nosebleeds, gum bleeding) may occur, especially if combined with anticoagulants or antiplatelet agents. Inform healthcare providers of concurrent anticoagulant use. Seek medical attention if bleeding is excessive.
Rare but serious allergic reactions including rash, hives, or angioedema have been reported. Discontinue immediately and seek emergency medical attention if signs of anaphylaxis (difficulty breathing, throat swelling, severe rash) occur.
Very rare cases of thrombocytopenia have been reported with pentosan polysulfate. Monitor for signs of low platelets (unusual bruising, petechiae, bleeding gums). Baseline and periodic platelet counts are recommended with long-term use.
Rare elevations in liver enzymes have been reported. Baseline liver function tests and periodic monitoring are recommended, particularly with long-term use or in patients with pre-existing liver disease.
Rare cases of retinal pigmentation changes and visual disturbances have been reported with long-term oral Elmiron use (>5 years). Baseline and periodic ophthalmologic examination is recommended for long-term users. Less relevant for short-term subcutaneous research use.
Dosing Reference
| Parameter | Value |
|---|---|
| Dose range | 100-300 mg |
| Frequency | 2-3x weekly |
| Timing | Any time of day |
| Route | Subcutaneous, Oral (Elmiron formulation) |
Subcutaneous injection for joint health. Dosing based on veterinary and research protocols. Oral form (Elmiron) 100 mg three times daily for interstitial cystitis. For research purposes only.
Research disclaimer
Figures drawn from published research literature and community logs. Not clinical recommendations. Consult a qualified professional. Research use only.
Reconstitution Guide
Do not use saline or bacteriostatic saline — use only bacteriostatic water for reconstitution
Do not shake the vial vigorously; gentle swirling prevents peptide degradation
Discard immediately if the solution appears cloudy, discolored, or contains visible particles
Use within 30 days of reconstitution when stored at 2–8°C
Do not freeze the reconstituted solution; freezing may denature the peptide
Use the PeptideVolt reconstitution calculator for your exact concentration
Molecular and Pharmacological Data
| Molecular weight | 4000-6000 Da (polysaccharide polymer, variable) |
| Half-life | Approximately 1.3 hours (IV); tissue accumulation occurs with repeated dosing |
Pentosan polysulfate is a semi-synthetic polysulfated xylan that exerts chondroprotective effects through multiple mechanisms: inhibition of inflammatory mediators and proteolytic enzymes that degrade cartilage matrix, enhancement of synovial fluid viscosity and lubrication, and modulation of the complement cascade. It also possesses anti-thrombotic properties and may stimulate endogenous hyaluronic acid production in synovial fluid.
Cartilage Matrix Protection
Inhibits matrix metalloproteinases (MMPs) and other proteolytic enzymes that break down cartilage collagen and proteoglycans, thereby slowing cartilage degradation in osteoarthritis.
Anti-inflammatory Signaling
Reduces production of pro-inflammatory cytokines (IL-1, TNF-α) and inhibits complement cascade activation, decreasing synovial inflammation and joint pain.
Synovial Fluid Enhancement
Increases synovial fluid viscosity and elasticity, improving joint lubrication and shock absorption, and may stimulate endogenous hyaluronic acid synthesis.
Anticoagulant Activity
Exhibits heparin-like anticoagulant properties through interaction with antithrombin III, reducing thrombotic risk.
- Pentosan polysulfate is a polysaccharide, not a peptide in the classical sense, but is included in peptide research databases due to its biological activity and research applications.
- Accumulates in cartilage and synovial tissue with repeated dosing, allowing for less frequent injection schedules.
- FDA-approved oral formulation (Elmiron) for interstitial cystitis; injectable form widely used in veterinary orthopedics and human research.
- Efficacy in human osteoarthritis remains mixed in clinical trials, though veterinary use shows consistent benefit.
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View all peptidesResearch Use Only. All content on this page is provided for informational and educational purposes related to scientific research. Pentosan Polysulfate is not approved for human use by the FDA or any equivalent regulatory body. This is not medical advice. Do not use any substance discussed here for therapeutic, diagnostic, or preventative purposes. Consult a qualified healthcare professional before making any health-related decisions. The Peptide Volt does not endorse the use of any research chemicals. 18+ only.