How to Help Your Patients Find Exemestane In Stock: A Provider's Guide

Patients with hormone receptor-positive breast cancer who are prescribed exemestane (Aromasin) are increasingly running into pharmacy access problems in 2026. While exemestane is not in an official FDA shortage, it is stocked in smaller quantities than more commonly prescribed aromatase inhibitors — and this creates real barriers for your patients. This guide equips you and your team with actionable strategies to help patients stay on their therapy without interruption.

Why Patients on Exemestane Are Having Trouble

Exemestane accounts for a small share of total aromatase inhibitor prescriptions — anastrozole and letrozole together make up the vast majority. Because pharmacies stock based on demand, exemestane inventories are thin. Supply-chain disruptions that wouldn't matter for a high-volume drug create meaningful stockouts for exemestane.

Additionally, some insurance plans require prior authorization for exemestane when a patient hasn't tried a nonsteroidal AI first. This creates a delay that looks to the patient like a supply problem but is actually an administrative one.

Strategy 1: Direct Patients to medfinder

One of the most efficient options for patients struggling to fill exemestane is medfinder.com. Patients provide their medication, dosage, and location. medfinder then contacts pharmacies near the patient to find which ones have the medication available and texts the patient the results. This eliminates the time and frustration of patients calling 10 pharmacies themselves — a task many patients find overwhelming, especially when already dealing with a cancer diagnosis.

Consider printing a handout or adding medfinder.com to your patient education materials as a resource for medication access issues.

Strategy 2: Build a Preferred Pharmacy Network

Your practice should maintain a short list of pharmacies that reliably stock exemestane in your area. This typically includes:

• Your institution's outpatient pharmacy. Cancer center and hospital outpatient pharmacies tend to stock the full range of oncology medications and can be a reliable fallback.
• Mail-order pharmacies. CVS Caremark, Express Scripts, Optum Rx, and Amazon Pharmacy all stock exemestane reliably and ship 90-day supplies. Strongly encourage patients to use mail-order for maintenance medications to avoid refill crises.
• Large chain pharmacies with high volume. High-volume CVS or Walgreens locations in your area may stock exemestane more reliably than low-volume suburban or rural locations.

Strategy 3: Prescribe 90-Day Supplies

Exemestane is a long-term maintenance medication. Prescribing 30-day supplies creates 12 potential access failure points per year. When possible and permitted by insurance, prescribe 90-day supplies. This:

• Reduces refill frequency and the number of opportunities for access gaps
• Is often cheaper per tablet through mail-order than 30-day retail fills
• Allows patients to maintain a safety buffer of medication at home

Strategy 4: Proactively Address Insurance Barriers

When prescribing exemestane for a new patient, anticipate prior authorization requirements and submit documentation preemptively rather than waiting for a denial. Key documentation to have ready:

• Diagnosis with ER-positive status (pathology confirmation)
• Postmenopausal status confirmation
• Prior tamoxifen use (if switching on the IES protocol)
• Prior anastrozole or letrozole failure or intolerance (if applicable)
• Clinical rationale for exemestane specifically vs. a nonsteroidal AI

Strategy 5: Know the Assistance Programs

For patients struggling with cost — which can drive non-adherence just as much as supply issues — the following assistance programs are available:

• Good Days Patient Assistance Program (1-877-968-7233): Helps insured patients with copay burden for exemestane
• GoodRx / SingleCare: Cash discount cards that bring generic exemestane to $25–$36 per 30-day supply at many pharmacies — often competitive with or lower than insurance copays
• NeedyMeds.org / RxAssist.org: Databases of patient assistance programs organized by drug

Sample Patient Communication Template

When a patient reports being unable to fill their exemestane, your team can use this as a starting script:

"Thank you for letting us know. First, check whether this is an insurance issue or a stock issue — ask the pharmacist directly. If it's a stock issue, here are your next steps: [1] Try a different pharmacy, [2] Use medfinder.com to find nearby pharmacies with stock, [3] Request a 90-day mail-order supply through your insurance, [4] Call our office back if you can't resolve it within 24–48 hours and we'll help from our end."

Additional Provider Resources

See also our clinical overview: Exemestane Shortage: What Providers and Prescribers Need to Know in 2026. For more information about how medfinder supports oncology practices, visit medfinder.com/providers.