Novolog (Insulin Aspart) Initiation and Dosing
Inject Novolog subcutaneously 5-10 minutes before meals into the abdomen, thigh, buttocks, or upper arm, typically starting at 4 units per meal or 0.1-0.2 units/kg/meal in Type 1 diabetes, or adding 4 units before the largest meal in Type 2 diabetes already on basal insulin. 1
Administration Timing and Technique
- Inject 5-10 minutes before meals (not 30 minutes like regular insulin) 1
- Rotate injection sites within the same region to prevent lipodystrophy
- Never inject into areas of lipodystrophy or localized cutaneous amyloidosis as this causes erratic absorption and hyperglycemia 1
- Use the shortest needles available (4mm pen needles) as first-line to avoid intramuscular injection 2
Starting Doses by Diabetes Type
Type 1 Diabetes
- Initiate as part of a basal-bolus regimen with intermediate or long-acting insulin 1
- Total daily dose typically 0.5-1.0 units/kg/day, with 50% as basal and 50% divided among meals 2
- Start prandial doses at approximately 4 units per meal or 0.1-0.2 units/kg per meal, adjusting based on carbohydrate intake
- Increase blood glucose monitoring frequency during initiation 1
Type 2 Diabetes
- Add Novolog to existing basal insulin when HbA1c ≥7.5% despite optimization 2
- Start with 4 units before the largest meal 3
- Titrate by 1-2 units every 3 days based on postprandial glucose readings
- Continue metformin and other oral agents; do not abruptly discontinue 2
- Target 2-hour postprandial glucose <180 mg/dL
Dosage Individualization
Individualize based on metabolic needs, blood glucose monitoring, and glycemic goals 1. Adjust for:
- Changes in physical activity or meal patterns
- Renal or hepatic dysfunction
- Acute illness
- Concomitant medications that affect glucose metabolism 1
Mixing Instructions
Critical mixing rules to prevent dosing errors:
- May ONLY be mixed with NPH insulin for subcutaneous injection 1
- When mixing: Draw Novolog first, then NPH, and inject immediately 1
- Never mix with any other insulin when using an insulin pump 1
- Never mix with insulin glargine (incompatible pH) 4
Storage Requirements
Unopened Vials/Pens
- Refrigerate at 2-8°C (36-46°F) until expiration date 1
- May store at room temperature up to 30°C (86°F) for 28 days 1
In-Use Storage
- Vials: 28 days at room temperature or refrigerated 1
- Pens (FlexPen, FlexTouch, PenFill): 28 days at room temperature; do NOT refrigerate once opened 1
- Insulin pumps: Change reservoir every 7 days maximum; do not expose to temperatures >37°C (98.6°F) 1
Critical Storage Warnings
- Never freeze; discard if frozen 1
- Avoid temperatures <2°C or >30°C when not in pump 4, 1
- Keep spare bottles available 4
- Inspect before each use: should be clear and colorless; discard if cloudy, discolored, or contains particles 4, 1
Common Pitfalls to Avoid
Lipodystrophy: Repeatedly injecting the same site causes insulin malabsorption and unpredictable glucose control. Strict site rotation is mandatory 1
Timing errors: Injecting too early (>15 minutes before eating) increases hypoglycemia risk; injecting after meals reduces postprandial control 1
Inappropriate mixing: Mixing with long-acting insulins other than NPH causes unpredictable absorption 1
Storage violations: Using insulin exposed to extreme temperatures or past 28 days of opening reduces potency 1, 5
Abrupt discontinuation of oral agents: When adding Novolog to Type 2 regimens, continue metformin to reduce weight gain and insulin requirements 2
Monitoring Requirements
- Increase blood glucose monitoring frequency during any insulin regimen changes 1
- Use fasting glucose to titrate basal insulin
- Use postprandial glucose (2 hours after meals) to titrate Novolog doses 2
- Monitor for hypoglycemia, especially nocturnal (though Novolog has lower nocturnal hypoglycemia rates than regular insulin) 6, 7