Terminal illness is a disease that cannot be cured or adequately treated and that is reasonably expected to result in the death of the patient within a short period of time.he six-month standard is arbitrary, and best available estimates of longevity may be incorrect. Consequently, though a given patient may properly be considered terminal, this is not a guarantee that the patient will die within six months.
1 Stop metformin if the eGFR is below 30 ml/minute/1.73m2.  Prescribe metformin with caution for those at risk of a sudden deterioration in kidney function and those at risk of eGFR falling below 45ml/minute/1.73m2.
A Stacy Wiegman, PharmD, Pharmacy, answered. The most common and less serious side effects of metformin are bloating, gas, stomach pain, weakness, diarrhea, constipation, heartburn, sneezing, headaches, cough, flushing of the skin, vomiting, runny nose, nausea and muscle pain.