Humalog generic: Availability, cost, and more

In this article:

• Humalog generic
• Generic vs. brand-name
• How much does generic Humalog cost?
• Off-label uses
• Is Humalog covered by insurance?
• How to get it covered
• Alternatives
• How to switch
• Bottom line
• Expert takeaway

In this article

• Humalog generic
• Generic vs. brand-name
• How much does generic Humalog cost?
• Off-label uses
• Is Humalog covered by insurance?
• How to get it covered
• Alternatives
• How to switch
• Bottom line
• Expert takeaway

Humalog is a brand-name, fast-acting insulin approved to manage blood sugar levels in adults and children with diabetes mellitus. A generic version of Humalog, called insulin lispro, became available in the United States in 2019, with a list price roughly 50% lower than the brand-name. Based on data from the Centers for Medicare and Medicaid Services (CMS), Humalog is among the most commonly prescribed insulins, and both brand-name and generic versions are available at most pharmacies.

Is there a generic for Humalog?

Yes, generic Humalog became available in 2019, 23 years after brand-name Humalog was launched. Insulin lispro is the generic name for Humalog.

In 2020, Lilly, the manufacturer of Humalog, announced it was also authorizing the production of a generic Humalog Junior KwikPen and Humalog Mix 75/25 KwikPen (insulin lispro protamine/insulin lispro). 

Both the brand-name and generic versions are available at most pharmacies, and CMS data suggests that most people get brand-name Humalog rather than the generic. 

Is Admelog generic Humalog?

No, Admelog is not generic Humalog. It’s another brand-name version of insulin lispro manufactured by Sanofi. It works just like Humalog and was released in 2017 as a more affordable Humalog alternative, but the two medications are made in different ways. This manufacturing difference is substantial enough to warrant a completely different brand name for Admelog.

Humalog consists of insulin lispro derived from living cells, making it a “biologic product.” In contrast, Admelog was originally approved as a copy of insulin lispro, known as a “follow-on insulin.” Admelog is now classified as a biologic.

According to an article published in Endocrine Practice in 2018, it’s impossible to copy the biologic product structure exactly, leading to differences in safety and efficacy. These potential differences mean Admelog is a separate product and can’t be marketed as generic Humalog. 

What are the differences between generic vs. brand-name Humalog?

Brand-name and generic Humalog have the same active ingredient, insulin lispro. They work the same way, have the same therapeutic effect, are given at the same dosage, and share FDA approval for the same indications. 

“The biggest difference is the cost and coverage,” says Gail Clifford, MD, an Orlando-based physician. “Generics are typically cheaper and preferred on insurance formularies, but there is no clinical reason to prefer brand-name Humalog over generic insulin lispro. There is no meaningful difference in safety or potency.” 

Jennifer Brown, MD, a board-certified obesity expert with MyObesityTeam, agrees. “In my mind, Humalog and its generic insulin lispro are, for all intents and purposes, identical.”

There may be minor differences in inactive ingredients, like preservatives, fillers, or coloring agents, in generic versus prescription drugs. In rare cases, someone may need to take brand-name Humalog because they’re sensitive to the preservative or filler in the generic version. 

Generics and brand-name medications are manufactured by different companies. Lilly makes Humalog, and generic insulin lispro is manufactured by a Lilly subsidiary, ImClone Systems. Medication often looks different based on the manufacturer, but there’s no significant difference in the way Humalog pens and vials look compared to insulin lispro pens and vials. They’re the same color and shape, so using one is exactly like using the other.

How much does generic Humalog cost?

Without insurance, generic Humalog (insulin lispro) retails for around $78 per 1, 3 mL of 100 unit/mL pen (about a month’s supply if using 10 units per day). Brand-name Humalog retails for around $116 per 1, 3 mL of 100 unit/mL pen. 

However, most people can save even more money regardless of whether or not they have insurance:

• A SingleCare prescription discount card lowers the price of brand-name Humalog and generic insulin lispro to as low as $33 per 1, 3 mL of 100 unit/mL pen, depending on pharmacy and location. 
• Prescription drug costs vary by plan, but some plans have $0 copays for generic or name-brand Humalog.
• By law, Medicare beneficiaries pay no more than $35 out-of-pocket per insulin prescription.
• People who qualify for the Lilly Insulin Value Program pay no more than $35 out-of-pocket.

Prescription drug prices often change. These are the most accurate medication prices at the time of publishing in ZIP code 23666 as of Mar. 24, 2026. The listed price without insurance references the price of brand-name drugs (unless otherwise specified). The listed SingleCare price references the price of generic drugs if available. 

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What are the off-label uses for Humalog? 

“Off-label Humalog is most common in hospital settings and in insulin pump therapy,” Dr. Clifford says. “Humalog is prescribed for its rapid action, predictability, and flexibility compared with regular insulin.” For example, if someone is experiencing diabetic ketoacidosis, they may be given rapid-acting insulin like Humalog to bring their blood sugar levels down quickly. 

Dr. Brown says some people use Humalog and other insulins off-label for bodybuilding. “They believe it increases muscle mass by enhancing protein synthesis. This is a very dangerous practice, since insulin can quickly cause severe hypoglycemia (low blood sugar) and death when people who are not diabetic use it.”

Is Humalog covered by insurance?

Humalog is covered by most commercial insurance plans, Medicare Part D, and Medicaid, though the coverage specifics will depend on your plan’s formulary. Some plans prefer generic insulin lispro over brand-name Humalog and may require step therapy or prior authorization before covering the brand-name version. By law, Medicare beneficiaries pay no more than $35 per month out-of-pocket for covered insulin prescriptions.

How do you get Humalog covered by insurance?

If your insurance plan requires step therapy or denies coverage for brand-name Humalog, switching to generic insulin lispro is often the fastest way to get coverage, since generics are typically preferred on insurance formularies and usually cost less. If brand-name Humalog is medically necessary, your healthcare provider can submit a prior authorization request showing why the brand name is required. For patients without insurance, a SingleCare discount card may help lower out-of-pocket costs at participating pharmacies. Lilly also offers the Lilly Insulin Value Program, which caps out-of-pocket costs at $35 per month for eligible patients.

Generic alternatives to Humalog

Although Humalog has a generic, there are other rapid-acting insulin options your healthcare provider may prescribe. Some have generic versions that may be more affordable:

• Admelog (insulin lispro): Admelog is another brand-name version of insulin lispro made by Sanofi. It works just like Humalog and may be covered differently by your insurance plan.
• NovoLog (insulin aspart): NovoLog is a rapid-acting insulin similar to Humalog. Generic insulin aspart is available and generally costs less.
• Apidra (insulin glulisine): Apidra is another rapid-acting insulin option that may be covered differently by your insurance.

Because these are not exact copies of Humalog, dosing and insurance coverage may vary. Never switch insulins without guidance from a healthcare provider, as even small differences in timing or dose can affect blood sugar levels. In many cases, a long-acting insulin is often used alongside a short-acting one.

How to switch from Humalog to generic Humalog

Switching from name-brand Humalog to generic Humalog is simple. Pharmacists are allowed to dispense lower-cost generic medications in place of name-brand medications. 

“Insurers and pharmacies often default to generic brands, but doctors may write ‘Dispense as Written’ on the prescription so that the pharmacy does not substitute a generic,” Dr. Clifford says. If this happens, talk to your healthcare provider about whether you can take generic Humalog.

You don’t have to taper off Humalog before switching to the generic version. Both options work exactly the same way in the body, so there’s no transition period. However, if you run out of Humalog or there’s an insulin shortage, it’s important to seek medical advice so you don’t experience life-threatening issues like hyperglycemia or diabetic ketoacidosis. 

Bottom line

Brand-name Humalog and generic insulin lispro work the same way but are made by different companies and have different retail costs. Generic insulin lispro tends to be the more affordable option, but both versions cost about the same with a SingleCare discount coupon. If you tend to be sensitive to the preservatives and fillers used in some medications, talk to your healthcare provider about whether name-brand or generic Humalog is right for you. Otherwise, there’s no substantial difference between these medications.

Expert takeaway

For most patients with Type 1 or Type 2 diabetes, there’s no clinical reason to stick with brand-name Humalog when the generic is available. It’s the same molecule made by the same company, and switching can help reduce out-of-pocket costs.