Carotid arteries: When you have clogged arteries in your brain, it is a condition called carotid artery disease. Plaque will block or narrow the carotid arteries, and signs of a stroke may be present. Symptoms include breathing problems, sudden weakness, confusion, severe headaches, loss of consciousness, blurry vision, trouble with speech, paralysis, trouble walking, dizziness, unexplained falls, and loss of coordination or balance.
In addition, taking metformin in the long run can lead to kidney failure, digestive disease, diarrhea, etc.so, despite of no kidney problems, patients with diabetes should not rely on metformin in the long term. As a consequent, we can know that metformin has side effects on kidney, doing harm to kidney function.
How Metformin Works. Metformin helps the body to control blood sugar in several ways. The drug helps type 2 diabetics respond better to their own insulin, lower the amount of sugar created by the liver, and decreasing the amount of sugar absorbed by the intestines.