Omega-3 Supplementation in Prevention of Aromatase Inhibitor-Induced Toxicity in Patients With Stage I-III Breast Cancer

PRIMARY OBJECTIVES: I. To determine the efficacy of the complementary therapy omega-3 fatty acid (n-3 PUFA) supplementation in preventing aromatase inhibitor-induced arthralgias (AIIAs). SECONDARY OBJECTIVES: I. To prospectively define the population most at risk for developing AIIAs by the identification and validation of genetic risk predictors and to develop a single nucleotide polymorphism (SNP)/gene profile predictive of treatment intervention response. OUTLINE: Patients are randomized to 1 of 2 groups. Group I: Patients receive omega-3 fatty acid supplementation orally (PO) once daily (QD) for 6 months. Group II: Patients receive placebo PO QD for 6 months. After completion of study, patients will be followed up periodically.