Insulin Dose Adjustment with Ozempic Initiation

Introduction to Insulin Dose Reduction

The American College of Cardiology recommends reducing total daily insulin dose by 20% when initiating Ozempic to prevent hypoglycemia, which translates to decreasing Humalog from 46 units to approximately 37 units daily and Lantus from 20 units to 16 units daily 1, 2
This reduction prevents hypoglycemia as GLP-1 receptor agonists like Ozempic enhance insulin sensitivity and reduce glucose production 1

Reduce Lantus from 20 units to 16 units (20% reduction) when starting Ozempic to balance glycemic control with safety 1, 2
Reduce total daily Humalog from 46 units to approximately 37 units (20% reduction), distributed across meals proportionally 1, 2
If currently taking Humalog in divided doses (e.g., 15-15-16 units), reduce to approximately 12-12-13 units 1

Monitor blood glucose closely 4-7 times daily during the initial titration period to assess both basal and prandial insulin adequacy 1, 2
Check fasting glucose, pre-meal glucose, and 2-hour post-meal glucose to evaluate insulin therapy 3
If hypoglycemia occurs (glucose <70 mg/dL), reduce the corresponding insulin dose by an additional 10-20% immediately 3, 4
Expect to reduce insulin doses by an additional 10-20% with each Ozempic dose escalation if glucose levels trend downward 1, 2

Continue metformin unless contraindicated, as it remains the foundation of type 2 diabetes therapy even when using insulin and GLP-1 receptor agonists 3, 4
Do not delay insulin dose reduction when starting Ozempic—the 20% reduction should occur immediately with the first Ozempic dose 1, 2
Do not continue escalating insulin doses if glucose levels improve with Ozempic; instead, reduce insulin further 1, 2
Do not ignore mild hypoglycemia (glucose 54-70 mg/dL)—this signals the need for additional insulin dose reduction 1, 3

Reassess insulin requirements every 2-4 weeks during Ozempic titration to optimize glycemic control 3