Reviewed by Peptide Treatments Medical Advisory Board
Pentosan Polysulfate: Side Effects & Safety
Known side effects, safety considerations, and adverse reaction data for Pentosan Polysulfate.
Back to Pentosan Polysulfate overviewData source: These side effects are documented in FDA-approved prescribing information.
Reported Side Effects (7 items)
| # | Side Effect |
|---|---|
| 1 | GI upset including nausea and diarrhea (15-20%) |
| 2 | Hair loss / alopecia (5-10%) |
| 3 | Headache (5-10%) |
| 4 | Rash (3-5%) |
| 5 | Bleeding tendencies and bruising (2-5%) |
| 6 | Pigmentary maculopathy with long-term use (0.5-1%) — vision-threatening |
| 7 | Thrombocytopenia (<1%) |
Known Drug Interactions
Important: Only documented and contraindicated interactions are shown here. View all interactions including theoretical →
| Drug | Classification | Mechanism |
|---|---|---|
| anticoagulants (warfarin, DOACs) | Documented | Additive anticoagulation increases bleeding risk — monitor INR closely, avoid if possible |
| NSAIDs | Documented | Combined platelet inhibition and heparinoid effect increases bleeding risk — avoid combination |
| aspirin | Documented | Additive antiplatelet effect increases bleeding risk — use with caution |
| heparin and LMWH | Documented | Additive anticoagulation — avoid concurrent use |