- Hepatitis (Hep) C positive (+) or Hep B surface antigen (+) Second malignancy with less than 5 years since documented clinical remission except for non-melanoma skin cancers or curatively treated cervical carcinoma in situ, superficial bladder cancer or early prostate cancer Prior history of allergic reaction to compounds of similar chemical or biologic composition to talactoferrin Inability to comply with study and/or follow-up procedures because of psychiatric or social situations Pregnant and nursing patients, sexually active patients (male and female) unwilling to practice contraception while on the study and at least 30 days after completion Oral corticosteroid therapy within 2 weeks prior to randomization or expected to be ongoing during the study Any gastrointestinal tract disease or other medical condition resulting in the inability to take oral medications