Study of Red Bull™ Sugar-Free Drink for Reduction of Fatigue in Prostate Cancer Patients Receiving LHRH Agonist Therapy

Inclusion Criteria: * Histologically confirmed prostate cancer * Currently receiving LHRH-agonist therapy for greater than 6 months * Measurable fatigue, defined as a score of ≥ 2 on the Bruera global fatigue severity scale * Able to swallow Red Bull™ Sugar-Free Drink * Life expectancy of at least 1 year * Able to read and write in English * Willing to limit consumption of alcohol to one drink per day Exclusion Criteria: * Current malignancy or received treatment for a previous malignancy within the last 3 years other than prostate cancer (exceptions are superficial bladder cancer or non-melanoma skin cancer) * Myocardial infarction within past 6 months * Any unstable serious co-existing medical condition(s) including but not limited to unstable or poorly controlled coronary artery disease, chronic atrial fibrillation, uncontrolled hypertension, uncontrolled diabetes, severe bleeding diseases or immune disorders * Evidence of drug or alcohol abuse * Known hypersensitivity to caffeine * Known history of liver and kidney insufficiencies * Known contraindications to Red Bull™ use