Hello Sir, My Daughter's Frequency Of Urination Is 20-25 Times

hello sir, my daughter's frequency of urination is 20-25 times in a day so peadiatric nephrologist suggest roliten 2.0 mg tablet after seeing urine routin and urtra sound report. she is taking this medicine for 20 days but no improvement in her condition. Could you please advide, how many days this table takes to be effective?Thanks