Patients who test positive for HBV or HCVP. Use of herbal products that may decr ease PSA levels (e.g. saw palmetto) Q. Any gastrointestinal disease that c ould hinder the absorption of enzalutamide R. Uncontrolled hypertension (SBP>170/ DBP>105) Version Date: 12/5/17 Abbreviated Title : Enzalutamide in non-met CSPC 262.1.3 Recruitment Strategies This study will be listed on available websites ( www.clinicaltrials.gov , https://ccr.cancer.gov/clinical-trials-search-start ) and participants will be recruited from the current patient population at NIH. 2.2 S CREENING EVALUATION A.