How Long Do I Have To Wait Before I Switch

Posted on Thu, 9 May 2019

Medically reviewed by Ask A Doctor - 24x7 Medical Review Team

Thu, 9 May 2019 Answered on

Last reviewed on

Question : how long do I have to wait before I switch form novolog to metformin

Answered by Dr. Dr. Michelle Gibson (1 hour later)

Brief Answer:
some persons use a combination, so does not need to be stopped

Detailed Answer:
HI, thanks for using healthcare magic

There is no interaction between these medications. Insulin can be used with metformin, it is commonly combined.

Metformin causes the blood sugar to lower towards normal but does not cause hypoglycemia which means it would not contribute to any low blood sugars that can be caused by insulin

You do not need to stop one to add the other. The insulin dose may need to be lowered when you add metformin however because this would also be trying to control the blood sugar

You would need to monitor to determine how to adjust the dose

I hope this helps, feel free to ask any other questions

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar