Possibly. Hormone therapy for prostate cancer blocks the action of testosterone in your body. Therefore, some men may have sexual problems during their treatment.
In clinical studies, 7% of men who took Casodex reported trouble getting an erection. These men were also taking another type of hormone therapy called an LHRH analog.
Talk with your doctor if you get any sexual side effects while taking Casodex. Your doctor may be able to suggest treatments that could help. For example, it may be possible to take medication such as sildenafil (Viagra) to help you get an erection.