Pentosan Polysulfate

Pentosan Polysulfate is a semi-synthetic sulfated polysaccharide that most users run for interstitial cystitis and bladder pain, with three-quarters of interstitial cystitis reports positive, while a smaller group reports benefits for joint health, among 20 captured community logs. Clinician sources cite 100 mg subcutaneous daily at any time, taken continuously without breaks, though community posts rarely log exact dose or timing. The strongest trial-level signal is a 25 percent withdrawal rate across the registered trial program, with roughly one in four participants discontinuing treatment.

Pentosan Polysulfate

Research Evidence

Evidence shape

Evidence for pentosan polysulfate is moderate, topped by Phase 3 trials but fragmented across eight mapped indications: knee osteoarthritis is the most studied with two registered trials, while psychotic disorders, diarrhea, prostatitis and radiation cystitis each have one. Three different sponsors have run trials, yet one in four has been withdrawn, only one of the eight has posted results, and interstitial cystitis and lower urinary tract symptoms carry no trial data.

Depthhow much
8 registered trials
3 completed · 1 with posted results · 3 recruiting / active · combined n=8
Breadthhow many areas
8 indications mapped
5 thin / exploratory · 1 animal-only · 6 single-trial long-tail
Qualityhow rigorous
Highest tier: Phase 3
3 distinct sponsors · 25% withdrawal rate · AE table from NCT02930005 · 1 linked publication on registered trials
Breadth and depth30 rows captured
Human
direct clinical signal
8
Animal
translational support
12
In vitro
mechanistic support
10
HighMediumLow

Anecdotal efficacy

Side effects

Clinical research side effects

Anecdotal side effects

Price

No live vendor pricing captured for this peptide yet.

Dosing & Protocol

How Pentosan Polysulfate is dosed across research, clinician, and community sources — each evidence tier kept separate so the dose range, frequency, timing, and cycling stay visible without flattening different levels of evidence.

Research trials
Published clinical-trial protocols · n = 3
Typical dose
No quantified dose captured for this tier.
Timing
unspecified
Cycle
unspecified

3 completed trials identified; trial dosing not reliably extracted from registry data.

3 sources
Clinician practice
Doctor & published-protocol guidance · n = 1
Typical dose
100 mg
100 mg
100 mg
Frequency
daily
Timing
unspecified
Route
subQ
Cycle
unspecified

Clinician protocols dose 100 mg daily subQ (1 source).

1 source
Anecdotal
Community-reported real-world use · n = 20
Typical dose
No quantified dose captured for this tier.

No structured protocol details captured for this tier yet.

Community discussions report positive experiences with Pentosan Polysulfate for Interstitial Cystitis & Bladder Pain (75% positive out of 16 reports) and for Joint Health & Osteoarthritis (100% positive out of 4 reports). Dosing data from posts is not explicitly available.

Peptide Deep Dive

Peptide Deep Dive is not projected for this peptide yet.

Regulatory safety notes

Contraindications
  • • CONTRAINDICATIONS ELMIRON ® is contraindicated in
  • • patients with known hypersensitivity to the drug, structurally related compounds, or excipients.
Drug interactions
  • • Drug-Drug Interactions In a study in which healthy subjects received pentosan polysulfate sodium 100 mg capsule or placebo every 8 hours for 7 days, and were titrated with warfarin to an INR of 1.4 to 1.8, the pharmacokinetic parameters of R-warfarin and S-wa…

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