A Study of Revaree Plus in People With Breast Cancer

Inclusion Criteria: * ≥18 years of age at the time of signing informed consent. * Stage 0-3 hormone-receptor positive breast cancer confirmed at MSKCC * Able to complete study questionnaires in English or Spanish * Breast cancer patients must have completed primary therapy (surgery, and/or chemotherapy, and/or radiation therapy) or currently on maintenance therapy * Currently on an aromatase inhibitor or tamoxifen or Selective Estrogen Receptor Modulators (SERM) * Currently have no clinical evidence of disease * Reporting being bothered by vaginal symptoms of estrogen deprivation (i.e., vaginal dryness, dyspareunia, or discomfort \[pain with intercourse or examination\]) * A total score of 4 or greater in VAS * Without history of other cancers (excluding non-melanoma skin cancer) * Must sign an informed consent indicating that the participant understands the purpose of, and procedures required for the study and is willing to participate in the study Exclusion Criteria: * Inability to provide informed consent * Vaginal bleeding of unknown etiology within 12 months of study entry * Currently taking hormone replacement therapy \[local or systemic\] (Patients must discontinue for 4 weeks in order to be eligible prior to study enrollment) * Existing use of external estrogens or nonhormonal moisturizers (Patients must discontinue for 4 weeks in order to be eligible prior to study enrollment) * No known allergies to any ingredients in 10mg HLA suppository