Clinical trial · Interventional
Study for Treatment of Moderate or Severe, Periodic, "Cyclic", Breast Pain
A Phase III, Multicenter, Randomized, Double-Blind, Placebo-Controlled Study of IoGen™ for the Treatment of Moderate or Severe, Periodic Breast Pain Associated With Symptomatic Fibrocystic Breast Disease
- Source
- ClinicalTrials.gov
- Retrieved
- Sep 8, 2026
- Layer
- normalized (units and labels harmonized; values unchanged)
- Run
- ING-CLINICALTRIALS-20260908-000001
Summary
Brief summary (as posted)
* History of clinical breast pain for at least the last six months. * At least six days of moderate or severe breast pain per cycle. * Fibrosis, cysts, nodules involving at least 25% of the surface of one breast. * Euthyroid with no prior history of thyroid disease. * Six months of daily therapy with molecular iodine. * Placebo controlled vs active (1:1).
Conditions
Conditions (4)
Free-text conditions as registered, with the CancerIndex entity they were reconciled to and the match type.
| Condition (as posted) | Mapped entity | Match | Confidence |
|---|---|---|---|
| Fibrocystic Changes of Breast | — | UNRESOLVED | — |
| Fibrocystic Disease of Breast | — | UNRESOLVED | — |
| Fibrocystic Mastopathy | — | UNRESOLVED | — |
| Pain | — | UNRESOLVED | — |
Interventions
Interventions (1)
| Intervention | Type | Mapped drug | Match |
|---|---|---|---|
| IoGen (molecular iodine) | Drug | — | UNRESOLVED |
Design
Arms and outcomes
Arms (0)
[]Primary outcomes (1)
- measure
- Total clinical breast pain as documented by patient daily diary.
Secondary outcomes (1)
- measure
- Change in fibrosis based upon breast examination.
Eligibility
Eligibility (as posted)
- Sex
- Female
- Minimum age
- 18 Years
- Maximum age
- 50 Years
Show eligibility criteria text
Inclusion Criteria: * History of clinical breast pain. * Documentation of 6 or more sequential days of moderate or severe pain by patient daily diary. * Conservative measures such as local heat, non-prescription analgesics, and properly fitted garments are not effective for the treatment of symptoms * Euthyroid with no prior history of thyroid disease. * Premenopausal female between the ages of 18 and 50. * The presence of at least one palpable structure (nodules, cysts) and involvement (diffuse nodularity or breast thickening) of at least 25% of at least one breast surface. Exclusion Criteria: * History of thyroid disease * Non-cyclic breast pain * Treatment with gonadotropin releasing hormone (GnRH) agonist, Danocrine, tamoxifen, raloxifene, or bromocriptine within three months of starting the trial * Initiation or change of any hormonal therapy within 6 months of enrollment; including birth control pills, hormone replacement therapy, any progestin including Norplant or Depo-Provera; * Current treatment with iodine or iodine-containing medications or diagnostics * Known hypersensitivity to iodine-containing products * Breast implants; * Oophorectomy (complete or partial) * Uncontrolled hypertension; * Breast biopsy breast biopsy within two months of screening; or expectation of a breast biopsy during the study for a suspicious mass present at baseline; * Pregnant women or nursing mothers * History of malignancy within the previous 5 years other than basal cell or squamous cell carcinoma of the skin * History of breast cancer
References
Publications (12)
- BACKGROUNDAceves C, Anguiano B, Delgado G. Is iodine a gatekeeper of the integrity of the mammary gland? J Mammary Gland Biol Neoplasia. 2005 Apr;10(2):189-96. doi: 10.1007/s10911-005-5401-5. PMID 16025225
- BACKGROUNDCann SA, van Netten JP, van Netten C. Hypothesis: iodine, selenium and the development of breast cancer. Cancer Causes Control. 2000 Feb;11(2):121-7. doi: 10.1023/a:1008925301459. PMID 10710195
- BACKGROUNDKessler JH. The effect of supraphysiologic levels of iodine on patients with cyclic mastalgia. Breast J. 2004 Jul-Aug;10(4):328-36. doi: 10.1111/j.1075-122X.2004.21341.x. PMID 15239792
- BACKGROUNDGhent WR, Eskin BA, Low DA, Hill LP. Iodine replacement in fibrocystic disease of the breast. Can J Surg. 1993 Oct;36(5):453-60. PMID 8221402
- BACKGROUNDGarcia-Solis P, Alfaro Y, Anguiano B, Delgado G, Guzman RC, Nandi S, Diaz-Munoz M, Vazquez-Martinez O, Aceves C. Inhibition of N-methyl-N-nitrosourea-induced mammary carcinogenesis by molecular iodine (I2) but not by iodide (I-) treatment Evidence that I2 prevents cancer promotion. Mol Cell Endocrinol. 2005 May 31;236(1-2):49-57. doi: 10.1016/j.mce.2005.03.001. Epub 2005 Apr 13. PMID 15922087
- BACKGROUNDEskin BA, Grotkowski CE, Connolly CP, Ghent WR. Different tissue responses for iodine and iodide in rat thyroid and mammary glands. Biol Trace Elem Res. 1995 Jul;49(1):9-19. doi: 10.1007/BF02788999. PMID 7577324
- BACKGROUNDThrall KD, Bull RJ, Sauer RL; New Collective Author. Distribution of iodine into blood components of the Sprague-Dawley rat differs with the chemical form administered. J Toxicol Environ Health. 1992 Nov;37(3):443-9. doi: 10.1080/15287399209531682. PMID 1433379
- Venturi S. Is there a role for iodine in breast diseases? Breast. 2001 Oct;10(5):379-82. doi: 10.1054/brst.2000.0267.