I recently changed to a new mail-order drug plan for my metformin. I also started taking alfalfa suplement (6 tablets of 650 mg a day).

My blood sugar levels have risen recently, though there has been no significant change to my diet. I have been exercising more.

The higher readings seem to coincide with the changes. I have recalibrated the blood meter to be sure of its accuracy.

My questions are:

Is the metformin maybe not as potent as the previous source?

Is the alfalfa counter acting with the metformin?

Thank you

Bob Mac

Hi, Bobmac

Alfalfa (Medicago sativa L.) has been used for centuries both as food and medicine. There are a small number of modern-day studies that show that alfalfa may be used to lower blood cholesterol and sugar. However they are still small, not very well designed studies, as are most studies involving herbal remedies -as they do not have the financial support of big drug companies. There is therefore only unclear scientific evidence for its use.
Having said that, it is usually well tolerated in doses up to 6 grams a day. Seems to me you are taking less than this.
You must take into account that, if it works, blood sugar levels may be reduced. I would therefore encourage you to discuss it with your doctor, as s/he may wish to monitor your blood sugar levels a bit closer, and perhaps adjust your Metformin. From what we know, the alfalfa should not counteract the action of metformin, but rather increase its effects, so your doctor will probably be thinking of lowering your metformin in the long run.

I think from what you tell us that the most likely cause for a rise in blood sugar is more related to your change to a cheaper type of metformin, probably of lesser quality than the one you were using before. I would encourage you to try and stick to the medication you were originally prescribed and make any changes together with your doctor. S/he should be one of your best allies in the management of your diabetes!

Hope this helps

Achi