My father, 70 years has problem with urination and was prescribed silodol 4mg once and NU BPH twice a day , for how long these can be continued in terms of being safe? Still urine is quite frequent but free flow .. history of bypass surgery.. also can these medicines lead to hypotention as bp at times stay at lower side ... earlier was taking urimax 0.4 but it leas to dizziness and extreme low bp.. any urologist for advice?