This phase II trial is examining the side effects (if any) that metastatic breast cancer patients experience when taking abemaciclib (an oral drug) with or without foodAn Open-Label, Randomized Phase 2 Study of the Impact of Food on Tolerability When Receiving Abemaciclib for Patients With Previously Treated Hormone Receptor-Positive, HER2-Negative, Metastatic Breast Cancer

Exclusion

• Are currently receiving treatment in a clinical study involving an investigational product.
• Have a serious concomitant systemic disorder.
• Have symptomatic central nervous system (CNS) malignancy or metastasis.
• Have a symptomatic Human Immunodeficiency Virus (HIV) infection or symptomatic activated/reactivated hepatitis A, B, or C.
• Have a personal history of syncope of either unexplained or cardiovascular etiology, ventricular tachycardia, ventricular fibrillation, or sudden cardiac arrest.
• Have a history of any other cancer.
• Had major surgery within 14 days prior to randomization.
• Are breastfeeding.
• Have received treatment with a drug that has not received regulatory approval for any indication within 14 or 21 days of the initial dose of study drug for a nonmyelosuppressive or myelosuppressive agent, respectively.