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