How to Help Your Patients Find Insulin, Regular, Human in Stock: A Provider's Guide

When Eli Lilly discontinues a specific Humulin R presentation, it's your diabetic patients who feel the impact first. Phone calls to your office, confused pharmacists, and patients rationing insulin are all preventable outcomes — if you and your care team are prepared. This guide gives you actionable steps to help your patients find regular human insulin in stock and avoid dangerous treatment gaps.

Understand the Current Supply Landscape

Before you can guide patients, your team needs to understand what's actually happening. As of 2026:

Humulin R 3 mL vials: PERMANENTLY DISCONTINUED

Humulin R U-500 vials: DISCONTINUED (KwikPen still available)

Humulin R 10 mL vials: AVAILABLE

Novolin R (vials and FlexPens): AVAILABLE — a direct clinical equivalent

Print or bookmark ASHP's drug shortage detail pages for real-time updates. Your pharmacy partner or group purchasing organization may also push shortage alerts.

Update Prescriptions Proactively

One of the highest-yield interventions your team can make is proactively updating prescriptions for any patient whose Rx still specifies the discontinued 3 mL Humulin R vial. Replace with one of the following:

Humulin R 100 units/mL, 10 mL vial (Lilly) — Same clinical effect, no dose change

Novolin R 100 units/mL, 10 mL vial (Novo Nordisk) — Same active ingredient, OTC available

Novolin R FlexPen, 100 units/mL (Novo Nordisk) — Prefilled pen format, good for patients who prefer pens

Avoid generic prescription language like "insulin regular human — dispense as written" with a discontinued NDC. This causes pharmacies to reject the prescription rather than substitute.

Direct Patients to medfinder for Pharmacy Location

One of the most common frustrations for patients is calling pharmacy after pharmacy and getting put on hold, only to be told the medication isn't available. medfinder for providers allows you to direct your patients to a service that calls pharmacies on their behalf. Patients enter their medication and zip code; medfinder calls local pharmacies and texts the patient a list of which ones can fill their prescription.

This removes the burden from both the patient and your front desk staff, and ensures that patients don't give up and delay refilling their insulin.

Leverage OTC Access as a Safety Net

Because U-100 regular insulin is available OTC, counsel patients that they do not need a new prescription to purchase Novolin R at Walmart, CVS, Walgreens, or most pharmacies if their Humulin R is unavailable. This is a critical safety net for:

Patients whose insurance has lapsed

Patients traveling who've run out of supply

Patients between appointments who cannot easily reach your office

What to Include in Patient Counseling

When counseling patients about this transition, cover these points:

The 3 mL vials are discontinued — they will not come back

The replacement (10 mL vial or Novolin R) is the same insulin at the same concentration — same dose, same timing

Updated storage duration: Humulin R 10 mL vials opened at room temperature last 28 days; Novolin R 10 mL vials last 42 days

Do NOT switch to a rapid-acting analog without medical guidance — injection timing is different

Savings programs: Lilly Insulin Value Program (insulinaffordability.com), Novo Nordisk My Insulin Rx

Identifying Patients at Highest Risk

Prioritize proactive outreach to:

Uninsured patients on fixed incomes who rely on OTC access

Patients on Humulin R U-500 vials who must switch to the KwikPen (requires hands-on training)

Elderly patients who may be less comfortable with new delivery devices

Patients with a history of emergency DKA admissions — disruption in insulin access is particularly high-risk for them

See our full prescriber-focused shortage update: Insulin, Regular, Human Shortage: What Providers Need to Know in 2026.