From the Guidelines
For a 93 kg patient on metformin and glicizide who is being admitted to the hospital, the better management approach would be to hold the oral antidiabetic medications and initiate insulin therapy during the hospitalization. This approach is based on the most recent evidence from 1, which suggests that insulin therapy is a commonly used treatment for type 2 diabetes in the hospital setting, especially for patients with severe hyperglycemia. The patient's current weight and medications should be taken into consideration when determining the appropriate insulin regimen. Some key points to consider when initiating insulin therapy in this patient include:
- Starting with a total daily dose of approximately 0.4-0.5 units/kg/day, which would be about 37-47 units total for this patient
- Dividing the total daily dose into half basal insulin and half prandial insulin, with basal insulin given once daily and prandial insulin given before meals
- Monitoring blood glucose levels before meals and at bedtime, with correction doses added as needed
- Adjusting the insulin regimen as needed based on the patient's changing clinical status The use of insulin therapy in the hospital setting is preferred because it provides more precise glycemic control and can be adjusted rapidly based on the patient's changing clinical status, as noted in 2 and 3. Additionally, metformin carries a risk of lactic acidosis in acutely ill patients or those undergoing procedures with contrast dye, while sulfonylureas like glicizide can cause hypoglycemia if meals are interrupted, as discussed in 1. Upon discharge, the patient can typically resume their home regimen of metformin and glicizide if appropriate for their outpatient management.
From the FDA Drug Label
Insulin Secretagogues or Insulin Clinical Impact:Coadministration of metformin hydrochloride tablets with an insulin secretagogue (e.g., sulfonylurea) or insulin may increase the risk of hypoglycemia. Intervention:Patients receiving an insulin secretagogue or insulin may require lower doses of the insulin secretagogue or insulin.
The patient is on metformin and glicizide, which is a sulfonylurea. Coadministration of these drugs may increase the risk of hypoglycemia.
- The patient's blood glucose should be monitored periodically to determine the minimum effective dose for the patient.
- Lower doses of glicizide may be required when coadministered with metformin to avoid hypoglycemia.
- The patient should be observed closely for hypoglycemia, especially when caloric intake is deficient, after severe or prolonged exercise, when alcohol is ingested, or when more than one glucose-lowering drug is used 4.
From the Research
Patient Management
The patient in question weighs 93 kg and is currently on metformin and gliclazide. To determine the better management approach, let's consider the available evidence:
- Metformin is a well-established first-line agent for the management of type 2 diabetes, effective in lowering blood glucose levels without increasing the risk of hypoglycemia 5.
- The combination of metformin and SGLT2 inhibitors may be a better option for improving glycemic control with a low risk of hypoglycemia, but it also increases the risk of metabolic acidosis 6.
- Basal insulin combined with oral therapy (metformin and glimepiride) is recommended for type 2 diabetes uncontrolled on oral anti-diabetic drugs (OADs) 7.
- Gliclazide, metformin, and pioglitazone monotherapies are equally effective in achieving glycemic control in patients with newly diagnosed type 2 diabetes, but improvements in cardiovascular risk factors were more pronounced with pioglitazone therapy 8.
- Gliclazide significantly reduces HbA1c with no difference in hypoglycemia risk compared to other oral insulinotropic agents, and has a lower hypoglycemia risk compared to other sulfonylureas 9.
Considerations for Management
When considering the management of this patient, the following points should be taken into account:
- The patient's current medication regimen includes metformin and gliclazide, which may need to be adjusted or combined with other therapies to achieve optimal glycemic control.
- The patient's weight and potential cardiovascular risk factors should be considered when selecting a management approach.
- The potential benefits and risks of combining metformin with SGLT2 inhibitors or basal insulin should be weighed against the patient's individual needs and health status.
Potential Management Options
Based on the available evidence, potential management options for this patient may include:
- Continuing metformin and gliclazide, with close monitoring of glycemic control and adjustment of the regimen as needed.
- Adding an SGLT2 inhibitor to the patient's regimen, with careful consideration of the potential risks and benefits.
- Initiating basal insulin therapy in combination with metformin and glimepiride, as recommended for type 2 diabetes uncontrolled on OADs.
- Considering alternative oral therapies, such as pioglitazone, which may offer additional benefits in terms of cardiovascular risk factor reduction.