I used to be on Victoza 2.8mg once a day and Metformin 500 mg twice a day, my doctor switched me to Lantus 10 mg once a day and Novalin R as needed. My blood sugar is staying between 250 and 300 and my doctor is on vacation. My question is can I take the Metformin 500 mg with the Lantus to try to see if I can bring my blood sugar down