What Causes Lack Of Urination After Taking Roliflo OD?

after diagnosed as superficial non muscle invasive urniary blader carcinoma ,i was taking DYNAPRESS 0.4 mg at bed time . due to increased frequency of urination, my doctor asked me to stop dynapress and take ROLIFLOOD OD 4 , I took one tablet yesterday night , urine flow totally stopped since yesterday , urine passed few dropps and no free flow, what do I do shall I stop ROLIFLOOD OD 4 I have a prostate enlargement Mild