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Data updated: Jul 17, 2026

RIMSO-50 (dimethyl sulfoxide) · Viatris

Urology Approved 1978-04-04

RIMSO-50 (dimethyl sulfoxide) is indicated for the symptomatic relief of patients with interstitial cystitis. RIMSO-50 has not been approved as being safe and effective for any other indication. There is no clinical evidence of effectiveness of dimethyl sulfoxide in the treatment of bacterial infections of the urinary tract.

Source: FDA Label
1
Indication
--
Phase 3 Trials
48
Years on Market

Details

Status
Prescription
First Approved
1978-04-04
Routes
INTRAVESICAL
Dosage Forms
SOLUTION

Companies

Active Ingredient: DIMETHYL SULFOXIDE

RIMSO-50 Approval History

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Original
New Indication
New Form
Label Update
12 FDA actions from 1978 to 2015
Aug 2015 SUPPL
Mfg · Manufacturing (CMC)
Aug 2014 SUPPL
Mfg · Manufacturing (CMC)
Jun 2013 SUPPL
Mfg · Manufacturing (CMC)

What RIMSO-50 Treats

1 indications

RIMSO-50 is approved for 1 conditions since its original approval in 1978. These indications span multiple therapeutic areas including oncology, immunology, and more.

  • Interstitial Cystitis
Source: FDA Label

RIMSO-50 Competitive Set

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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 RIMSO-50

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ELMIRON
PENTOSAN POLYSULFATE SODIUM
1 shared
Johnson & Johnson
Shared indications:
Interstitial Cystitis

Viatris's other novel FDA approvals

Other CDER-designated drugs from the same sponsor (2016–2025).

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Clinical Trial Registry

1 trials
Trial Sponsor ID Phase Status Title
NCT03716583 MELADERM 2018-001705-91 Ph 2 completed Melatonin Cream Against Acute Radiation Dermatitis in Patients With Early Breast Cancer
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Active Pipeline

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Key Completed Trials

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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.

RIMSO-50 FDA Label Details

Indications & Usage

RIMSO-50 ® (dimethyl sulfoxide) is indicated for the symptomatic relief of patients with interstitial cystitis. RIMSO-50 ® has not been approved as being safe and effective for any other indication. There is no clinical evidence of effectiveness of dimethyl sulfoxide in the treatment of bacterial infections of the urinary tract.

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Data Sources

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