Initial Management of High A1c Levels

Treatment Approach

For patients with A1c ≥8.5% who are symptomatic, the American Diabetes Association recommends initial treatment with basal insulin while metformin is initiated and titrated 1, 2
The American Diabetes Association suggests that patients with marked hyperglycemia, such as an A1c of 12%, require more aggressive initial management 3, 4
The initial metformin dose should be 500 mg orally twice daily with meals, as recommended by the American Academy of Pediatrics 5
Basal insulin should be initiated at 0.5 units/kg/day for patients with A1c ≥8.5% and symptomatic hyperglycemia, according to the American Diabetes Association 4

The American Diabetes Association recommends assessing glycemic status every 3 months with A1c measurement 1, 2
Home self-monitoring of blood glucose should be individualized based on the treatment regimen, as suggested by the American Diabetes Association 1
A reasonable A1c target for most patients with type 2 diabetes treated with oral agents alone is <7% (53 mmol/mol), according to the American Diabetes Association 1, 2

Insulin doses can be titrated every 2-3 days based on blood glucose monitoring, as recommended by the American Diabetes Association 4
Once glycemic control improves, insulin can be tapered over 2-6 weeks by decreasing the dose by 10-30% every few days while continuing metformin, according to the American Diabetes Association 2, 4

Main gastrointestinal adverse effects of metformin are often transient, as noted by the American Academy of Pediatrics 5
Starting at a low dose and gradually titrating metformin helps minimize gastrointestinal side effects, as suggested by the American Academy of Pediatrics 5

Delaying insulin therapy in patients with marked hyperglycemia can prolong poor glycemic control, according to the American Diabetes Association 4
Using metformin monotherapy without insulin in patients with very high A1c is likely to be insufficient for adequate glycemic control, as noted by the American Diabetes Association 4
Failing to assess for ketosis/ketoacidosis in patients with markedly elevated glucose levels is a common pitfall, according to the American Diabetes Association 2, 4

For patients with markedly elevated HbA1c (>10%) or blood glucose levels (≥300 mg/dL), early introduction of insulin should be considered, especially when symptoms of hyperglycemia are present 6, 7
Initiating dual therapy is recommended for patients with newly diagnosed type 2 diabetes who have A1C ≥1.5% above their glycemic target 6
For a patient with an HbA1c of 12%, dual therapy with metformin 1000mg BID plus basal insulin should be initiated rather than metformin monotherapy 6, 7

The standard effective dose of metformin is 2000 mg daily (1000 mg twice daily), which is appropriate for most patients 6