Is it okay to initiate Ozempic (semaglutide) with a hemoglobin A1c (HbA1c) level indicating severe hyperglycemia?

Medical Advisory BoardAll articles are reviewed for accuracy by our Medical Advisory Board
Educational purpose only • Exercise caution as content is pending human review
Article Review Status
Submitted
Under Review
Approved

Last updated: May 1, 2025View editorial policy

Personalize

Help us tailor your experience

Which best describes you? Your choice helps us use language that's most understandable for you.

From the Guidelines

Starting Ozempic with an A1C of 13 is appropriate and often recommended, as it can effectively lower blood sugar in people with type 2 diabetes who have significantly elevated A1C levels, and should be considered alongside other medications like metformin or insulin as part of a comprehensive treatment plan. According to the most recent guidelines, when A1C is ≥1.5% above the individualized glycemic goal, many individuals will require dual-combination therapy or a more potent glucose-lowering agent to achieve and maintain their goal A1C level 1. Ozempic is a GLP-1 receptor agonist that works by stimulating insulin release when blood sugar is high, reducing glucagon secretion, slowing gastric emptying, and reducing appetite, which helps lower blood sugar levels and may promote weight loss.

The typical starting dose of Ozempic is 0.25 mg once weekly by subcutaneous injection for 4 weeks, then increasing to 0.5 mg weekly, with possible further increases to 1 mg or 2 mg weekly if needed for glycemic control. Common side effects include nausea, vomiting, diarrhea, and abdominal pain, which often improve over time. It is essential to monitor blood sugar regularly and stay in close contact with the healthcare provider during the initial treatment period. Additionally, the guidelines suggest that insulin should be considered as part of any combination medication plan when hyperglycemia is severe, especially if catabolic features are present 1.

Some key points to consider when starting Ozempic with an A1C of 13 include:

  • The importance of comprehensive treatment plans that may include multiple medications and lifestyle changes
  • The need for regular monitoring of blood sugar levels and close contact with the healthcare provider
  • The potential for common side effects and the importance of managing them effectively
  • The consideration of insulin therapy as part of the treatment plan, especially in cases of severe hyperglycemia. As noted in the guidelines, metformin is often the initial pharmacologic treatment choice, but Ozempic can be considered as an alternative or additional therapy, especially in cases where the A1C level is significantly elevated 1.

From the Research

Ozempic and A1C Levels

  • There is no direct evidence in the provided studies to suggest whether it is okay to start Ozempic with an A1C level of 13.
  • However, the studies suggest that lifestyle modifications, such as diet and physical activity, can be effective in improving glycemic control and reducing A1C levels in patients with type 2 diabetes mellitus 2, 3, 4, 5.
  • Additionally, one study found that lifestyle modification can be more effective than metformin in preventing type 2 diabetes 6.
  • It is worth noting that Ozempic (semaglutide) is a medication that is typically used to improve glycemic control in patients with type 2 diabetes mellitus, and its effectiveness may be enhanced when used in combination with lifestyle modifications.

Lifestyle Modifications and A1C Levels

  • The studies suggest that lifestyle modifications, such as diet and physical activity, can be effective in improving glycemic control and reducing A1C levels in patients with type 2 diabetes mellitus 2, 3, 4, 5.
  • A systematic review and meta-analysis found that lifestyle interventions can achieve diabetes remission among patients with type 2 diabetes mellitus, and that diet and physical activity have a significant effect on blood glucose and weight control 5.
  • Another study found that lifestyle modification can decrease the probability of the incidence of type 2 diabetes by 25.3% compared to metformin intervention 6.

Medications and A1C Levels

  • One study compared the effectiveness of metformin with lifestyle modification for the primary prevention of type 2 diabetes, and found that lifestyle modification can be more effective than metformin in preventing type 2 diabetes 6.
  • However, there is no direct evidence in the provided studies to suggest whether Ozempic is effective in improving glycemic control in patients with an A1C level of 13.

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

Have a follow-up question?

Our Medical A.I. is used by practicing medical doctors at top research institutions around the world. Ask any follow up question and get world-class guideline-backed answers instantly.