The important thing is, if you change your medication schedule, diet, or exercise to begin a program of extra blood sugar testing.
It is not unreasonable to take two 1000 mg Metformin tablets a day, provided you get regular liver function testing. Or three 500 mg tablets. But you should not do so blindly. And you can't count on "feeling" to sense your glucose levels.
Intense blood glucose testing is the only way to get a handle on whether or not your medications are being properly used. Many diabetic clinics have a download feature where you come in and they download information from your meter. Without sucvh information your physician or nurse practicioner or PA cannot provide appropriate advice.
You're welcome and best of health to you too.
Thanks for your coment. You are right I should see my Dr.
"When my sugar is really high I will take one extra metformin. Is this okay ?"
No, never increase or decrease medication without your doctor's knowledge and permission. You can endanger yourself with a possible hypoglycemia episode. It might be time to see your doctor again as your medication regimen may be in need of adjustment.