Omnipod systems use rapid-acting U-100 insulin. Six specific brands have been tested and cleared for use in the pod: NovoLog, Humalog, Admelog, Fiasp, Lyumjev, and Apidra. Long-acting, intermediate-acting, and concentrated insulins (like U-200 or U-500) are not compatible.
Compatible Insulin Brands
According to FDA clearance documents, the following U-100 rapid-acting insulins have been tested and found safe for the Omnipod pod:
- NovoLog (insulin aspart)
- Humalog (insulin lispro)
- Admelog (insulin lispro, a biosimilar to Humalog)
- Fiasp (insulin aspart, ultra-rapid-acting)
- Lyumjev (insulin lispro-aabc, ultra-rapid-acting)
- Apidra (insulin glulisine)
NovoLog, Humalog, and Admelog are the most commonly used options and have the longest track record with the system. All compatible insulins can remain in the pod for up to 72 hours (3 days) before you need to replace it with a fresh pod.
Omnipod 5 vs. Omnipod DASH Compatibility
There is a practical difference worth knowing. The Omnipod DASH, which is a manual insulin pump without automated delivery, is compatible with all six insulins listed above. The Omnipod 5, which works with a continuous glucose monitor to adjust basal insulin automatically, was originally FDA-cleared for use with NovoLog, Humalog, and Admelog specifically. The broader list of six insulins applies to the Omnipod systems overall, but if you’re using the Omnipod 5’s automated mode, confirm with your provider which insulins are approved for that feature.
Using Ultra-Rapid-Acting Insulins
Fiasp and Lyumjev are sometimes called “ultra-rapid” insulins because they start working faster than traditional rapid-acting options. They reach the bloodstream more quickly after delivery, which can help reduce post-meal blood sugar spikes. Both have been tested and cleared for use in the pod.
The faster absorption profile does change how your body responds to boluses and corrections. Some people find that Fiasp or Lyumjev work well in the pod but require adjustments to timing or dosing settings. If you’re switching from a standard rapid-acting insulin to one of these, expect a transition period where your settings may need fine-tuning.
Why Only U-100 Insulin
The Omnipod pod is designed exclusively for U-100 concentration insulin, meaning 100 units per milliliter. Concentrated insulins like U-200 or U-500 deliver more units per volume, which would cause the pod to dispense far more insulin than its dosing algorithm expects. Using the wrong concentration could lead to dangerous overdosing. Similarly, long-acting insulins like Lantus or Tresiba are not compatible because the pod delivers small, continuous micro-doses throughout the day, which is how rapid-acting insulin mimics a healthy pancreas. Long-acting insulin is formulated to release slowly from a single injection and would not function correctly in a pump.
Pod Reservoir Capacity
Each pod holds between 85 and 200 units of insulin. The 85-unit minimum is a hard requirement: the pod will not activate with less than that amount. It confirms the fill by beeping twice once 85 units have been loaded. The 200-unit maximum means the pod can last a full 3 days for most adults, though people with higher daily insulin needs may come close to that ceiling.
If your total daily dose is low, you’ll still need to fill at least 85 units even though some insulin will go unused when the pod expires after 72 hours. This is a common point of frustration for children or adults with lower insulin requirements, but it’s a fixed design constraint of the system.
Tips for Filling the Pod
Insulet recommends using room-temperature insulin when filling the pod. Cold insulin straight from the refrigerator is more likely to create air bubbles inside the reservoir, which can lead to occlusions, gaps in delivery, or inaccurate dosing. Letting your insulin vial sit at room temperature for about 30 minutes before filling is usually enough. Most rapid-acting insulins are stable at room temperature for 28 days, so many people simply keep their active vial out of the fridge.