Hi, Thanks for writing in. Biprosta contains bicalutamide which is a nonsteroidal antiandrogen given to patients of prostate cancer who are hormone dependent and where castration is to be avoided. The mean duration of treatment with biprosta depends on the need to treat the cancer. In early cancer it is given for a short duration of weeks to months and often stopped when there is no more treatment required. In advanced or long term cancer management it is given for as long as it works to control the cancer. Please continue taking biprosta under recommendation of your doctor if it is being given to control your cancer. It will not cause any serious adverse effect on you. Please do not worry.