Last reviewed 2026-05-28 · How we verify

tiosulfate

Hospital General Universitario Gregorio Marañon · Phase 2 active Small molecule ✓ Verified May 2026

tiosulfate is a Small molecule drug developed by Hospital General Universitario Gregorio Marañon. It is currently in Phase 2 development.

Tiosulfate is being studied as a potential nephroprotective agent in patients undergoing debulking surgery for ovarian cancer. It is being compared to cilastatine in a clinical trial for its ability to prevent acute kidney injury.

Likelihood of approval

15.3% vs 15.3% industry baseline

If approved by FDA: likely 2031–2034

Steps remaining: Phase 3 → NDA/BLA submission

Confidence: Medium

Why this estimate

Baseline phase 2 → approval rate +15.3pp
Industry-wide phase 2 drugs reach approval ~15.3% of the time (BIO/Informa 2023 industry benchmark across all therapeutic areas).

Predicted approval windows by jurisdiction (conditional on FDA approval)

Regulator	Country	Likely year	Lag vs FDA
FDA	US	2031–2034	—
EMA	EU	2032–2035	+0.7 yr
MHRA	GB	2032–2035	+0.7 yr
Health Canada	CA	2032–2036	+0.9 yr
TGA	AU	2032–2036	+1.2 yr
PMDA	JP	2032–2036	+1.5 yr
NMPA	CN	2033–2037	+2.3 yr
MFDS	KR	2032–2036	+1.4 yr
CDSCO	IN	2032–2037	+1.8 yr
ANVISA	BR	2033–2037	+2.3 yr

Hover any row for the lag rationale. Lag estimates are reduced when the drug has FDA Breakthrough or EMA PRIME designation (sponsors file globally in parallel).

Estimate based on the BIO/Informa industry phase transition rates plus per-drug modifiers for therapeutic area, sponsor type, FDA designations, mechanism, and trial design. Per-jurisdiction lags from Tufts CSDD international approval studies. Not investment, clinical or regulatory advice. Methodology: /methodology#likelihood.

At a glance

Generic name	tiosulfate
Sponsor	Hospital General Universitario Gregorio Marañon
Modality	Small molecule
Therapeutic area	Other
Phase	Phase 2

Approved indications

No approved indications tracked.

Common side effects

No common side effects on file.

Key clinical trials

A Double-blind Non Inferiority Clinical Trial to Compare the Nephroprotection of Cilastatn Versus Thiosulfate in Patients Undergoing Debulking Surgery With Intraoperative Hyperthermic Intraperitoneal Chemotherapy With Cisplatin. (PHASE2)

Primary sources

Every claim on this page is sourced from regulatory or scientific primary sources. See our editorial policy for full methodology.

Source	Used for
ClinicalTrials.gov	Trial enrolment, design, endpoints, results

Competitive intelligence

For the full competitive landscape — auto-detected comparators, recent regulatory actions across the set, upcoming PDUFA, patent timeline, sponsor landscape:

tiosulfate CI brief — competitive landscape report
tiosulfate updates RSS · CI watch RSS
Hospital General Universitario Gregorio Marañon portfolio CI

Frequently asked questions about tiosulfate

What is tiosulfate?

tiosulfate is a Small molecule drug developed by Hospital General Universitario Gregorio Marañon.

Who makes tiosulfate?

tiosulfate is developed by Hospital General Universitario Gregorio Marañon (see full Hospital General Universitario Gregorio Marañon pipeline at /company/hospital-general-universitario-gregorio-mara-on).

What development phase is tiosulfate in?

tiosulfate is in Phase 2.

Manufacturer: Hospital General Universitario Gregorio Marañon — full pipeline
Therapeutic area: All drugs in Other

Primary sources · FDA · ClinicalTrials.gov · EMA · SEC EDGAR · ChEMBL · Wikidata · full sourcing