hai, There is no home remedy for enlarged prostate. As your father s prostate become larger and it will lead to discomfort in passing urine on and off. as your father wants to drain the urine, external pressure from enlarged prostate will compress the urethral passage and stop the urination in the mid. so he will be walking to toilet on and off to void urine frequently that leads to disturbed sleep. disturbed sleep will lead to drowsy and headache etc. as he is already got high blood pressure and arthritis. this condition will even make him bad physically as well as mentally. consult a urologist to fix this issue regarding the prostate enlargement. thank you hope i answered your query.