SN instructed patient / caregiver regarding medication Metformin. SN explained to patient / caregiver that metformin is an oral anti - diabetic medication and is used to treat type 2 diabetes mellitus. SN explained that it is the first - line drug of choice for the treatment of type 2 diabetes, particularly in overweight and obese people. SN explained that using metformin alone will help to lower blood sugar when it is too high and help restore the way food is used to make energy. SN instructed patient to notify physician ( MD ) if experiencing symptoms / signs ( S / S ) of hypoglycemia such as shakiness, nervousness, sweating associated with dizziness / lightheadedness.