TheraRadar
Data updated: May 26, 2026

SODIUM THIOSULFATE

Other Approved 1992-02-14

Sodium thiosulfate is an antidote used for patients experiencing serious or life-threatening acute cyanide poisoning. It is administered sequentially with sodium nitrite to counteract the rapid and dangerous effects of cyanide on the body's cells. This medication helps patients by facilitating the detoxification of cyanide, especially when the poisoning is severe enough to stop cellular respiration.

Source: FDA Label • US ARMY

How SODIUM THIOSULFATE Works

Sodium thiosulfate works by enhancing the body's natural detoxification process, which converts cyanide into thiocyanate through enzymatic transulfuration. This resulting thiocyanate is relatively nontoxic and is easily cleared from the body through the urine. By neutralizing the poison, the drug helps restore the cells' ability to use oxygen and prevents metabolic acidosis.

2
Indications
--
Phase 3 Trials
34
Years on Market

Details

Status
Discontinued
First Approved
1992-02-14
Patent Cliff
2031

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Patent cliff and revenue data

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Routes
INJECTION, INTRAVENOUS
Dosage Forms
INJECTABLE, SOLUTION

Companies

Active Ingredient: SODIUM THIOSULFATE

SODIUM THIOSULFATE Approval History

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2026
Original
New Indication
New Form
Label Update
5 FDA actions from 1992 to 2026
May 2026 SUPPL
Mfg · Manufacturing (CMC)
Jun 2020 SUPPL
Label · Labeling
Oct 2017 SUPPL
Label · Labeling

What SODIUM THIOSULFATE Treats

1 indications

SODIUM THIOSULFATE is approved for 1 conditions since its original approval in 1992. These indications span multiple therapeutic areas including oncology, immunology, and more.

  • Cyanide Poisoning
Source: FDA Label

SODIUM THIOSULFATE Competitive Set

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Same target(s) AND same indication — head-to-head.

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Filters applied: drops same-active-ingredient (505(b)(2) reformulations), route-mismatch (topical vs systemic), and cross-therapeutic-area matches in same-indication rings.

Drugs Similar to SODIUM THIOSULFATE

FDA-approved drugs for similar conditions. Compare mechanisms and indications to understand treatment alternatives.

CYANOKIT
HYDROXOCOBALAMIN
1 shared
BTG INTL
Shared indications:
Cyanide Poisoning
NITHIODOTE
SODIUM NITRITE
1 shared
HOPE PHARMS
Shared indications:
Cyanide Poisoning
SODIUM NITRITE
SODIUM NITRITE
1 shared
HOPE PHARMS
Shared indications:
Cyanide Poisoning
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Clinical Trial Registry

18 trials
Trial Sponsor ID Phase Status Title
NCT03127774 AAAQ9194 Ph 2 active not recruiting Surgery and Heated Intraperitoneal Chemotherapy for Adrenocortical Carcinoma
NCT05382338 ACNS2031 NCI-2022-04866, ACNS2031 Ph 3 recruiting A Study of Treatment for Medulloblastoma Using Sodium Thiosulfate to Reduce Hearing Loss
NCT04847063 210012 21-C-0012 Ph 1 recruiting Individual Response to Hyperthermic Intraperitoneal Chemotherapy (HIPEC) Treatment of Peritoneal Carcinomatosis From Peritoneal Mesothelioma or Atypical Mesothelial Proliferation or From Ovarian, Colorectal, or Appendiceal Histologies
NCT05018221 BEAT-Calci BEAT-Calci Ph 3 recruiting Better Evidence and Translation for Calciphylaxis
NCT02527213 1STS12001 Ph 3 withdrawn Double-blind Trial of Sodium Thiosulfate for the Treatment of Pain Associated With Calcific Uremic Arteriolopathy
NCT03092518 results posted 170070 17-C-0070 Ph 2 completed Heated Intraperitoneal Chemotherapy and Gastrectomy for Gastric Cancer With Positive Peritoneal Cytology
NCT03267277 results posted 170161 17-E-0161 Ph 2, Ph 3 completed Sodium Thiosulfate for Treatment of Calcinosis Associated With Juvenile and Adult Dermatomyositis
NCT04541355 results posted 20208 NCI-2020-05752 Ph 2 completed Sodium Thiosulfate in Preventing Ototoxicity for Squamous Cell Cancer Patients Undergoing Chemoradiation With Cisplatin
NCT00716976 results posted ACCL0431 COG-ACCL0431, CDR0000588655 Ph 3 completed Sodium Thiosulfate in Preventing Hearing Loss in Young Patients Receiving Cisplatin for Newly Diagnosed Germ Cell Tumor, Hepatoblastoma, Medulloblastoma, Neuroblastoma, Osteosarcoma, or Other Malignancy
NCT02624479 TSTS 009_15 Ph 1 withdrawn Pharmacokinetic Study to Investigate the Bioavailability and Tolerability of 3 Oral Formulations of Sodium Thiosulfate
NCT03639779 results posted BIO-18-14095 Ph 4 terminated Efficacy of Intralesional Sodium Thiosulfate Versus Intralesional Saline for Dystrophic and Idiopathic Calcinosis Cutis
NCT02092298 results posted 2013-0989 NCI-2014-01105 Ph 2 completed Laparoscopic Hyperthermic Intraperitoneal Chemoperfusion (HIPEC) for Metastatic Gastric Cancer
NCT03150420 CALISTA ST-001 Ph 3 terminated A Phase 3 Clinical Trial of Intravenous Sodium Thiosulfate in Acute Calciphylaxis Patients
NCT01833832 results posted 130114 13-C-0114 Ph 2 completed Surgery and Heated Chemotherapy for Adrenocortical Carcinoma
NCT02538939 THIOCAL RC14_0394 Ph 2 completed Efficacy and Tolerance of Sodium Thiosulfate Injection After Ultrasound-guided Percutaneous Irrigation of Calcific Tendinopathy of the Rotator Cuff
NCT01572844 results posted 121131 Ph 2 completed Topical Sodium Thiosulfate and Fractional Carbon Dioxide Laser in Treating Dermatomyositis Associated Calcinosis
NCT00397501 IRB00002188 2188, SOL-06015 Ph 1, Ph 2 withdrawn BBBD Followed By Methotrexate and Carboplatin With or Without Trastuzumab in Treating Women With Breast Cancer That Has Spread to the Brain
NCT01918904 STS-CALC 205683 Ph 2 withdrawn A Pilot Study to Evaluate Topical Sodium Thiosulfate Therapy for Calcinosis Cutis
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Active Pipeline

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Key Completed Trials

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Completed studies with published results, ranked by significance

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Trial Timeline

Full development history with FDA approval milestones

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Understanding FDA Approval Types
Count Type What it means
- ORIG Original approval - drug first enters market
- SUPPL - Efficacy New indication (new disease/condition approved)
- SUPPL - Labeling Label text changes (warnings, dosing updates)
- SUPPL - Manufacturing Production changes (new facility)
- SUPPL - Chemistry Formulation changes (new dosage strength)

Green lines in the timeline show ORIG and Efficacy approvals - the clinically meaningful milestones.

SODIUM THIOSULFATE FDA Label Details

Indications & Usage

FDA Label (PDF)

SODIUM THIOSULFATE is indicated for the treatment of Cyanide Poisoning.

View full patent landscape →
6 OB patents · 1 families · 70 international docs across 12 countries

SODIUM THIOSULFATE Patents & Exclusivity

Latest Patent: Mar 2031

Patents (6 active)

US8496973 Expires Mar 29, 2031
US9345724 Expires Jul 7, 2030
US10479686 Expires Jul 7, 2030
US9585912 Expires Jul 7, 2030
US11753301 Expires Feb 10, 2030
US12304813 Expires Feb 10, 2030
Source: FDA Orange Book

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Revenue Insights

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Patent Timeline

  • Cliff: 2031
  • 6 active patents

Trial Analysis

  • Clinical trial tracking
  • Development stage analysis

Competitive Landscape

  • 3 similar drugs
  • Same target/indication analysis
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Data Sources

Data sourced from official FDA and NIH databases. Click links to verify on original sources.