Victoza should begin working to lower your blood sugar levels within a day or two.
But you should see your blood sugar levels go down significantly within 2 weeks as long as you continue to use the Victoza as prescribed and as advised by your doctor.
If you do not see your blood sugar levels go down enough after 2 weeks of using the Victoza then you should let your doctor know.
You might need something else to help lower your blood sugar levels because the Victoza may not be working for you.
But for most people who use Victoza see their blood sugar levels drop a good amount within 2 weeks so you should see your blood sugar levels drop within 2 weeks.