When Your Medication Is Recalled: How to Check Your Lot Number and What to Do Next

Every drug product manufactured in the United States is assigned a lot number — a code that identifies the specific production batch. When the FDA issues a recall, it lists the exact lot numbers affected. If your lot number is not on the list, your supply is not part of the recall, even if it is the same drug and manufacturer.

The lot number (sometimes labeled "Lot," "LOT," "Batch," or "BN") is printed on the drug's outer packaging — the box, if you still have it — and often on the label of the bottle itself. For a prescription bottle, it may be on the pharmacy label, which your pharmacist adds when dispensing the medication. If you cannot find the lot number on your bottle, your pharmacist can look it up.

For blister pack medications, the lot number is typically on the back panel. For inhalers and other devices, it may be on the device body or a sticker. For eye drops and topical products, check the crimp at the bottom of the tube or the bottom of the bottle.

This is the most important point in this guide: do not abruptly stop taking a prescription medication because of a recall without first consulting your doctor or pharmacist. For many medications — blood pressure drugs, antidepressants, diabetes medications, anticoagulants, steroids, and others — stopping suddenly can cause serious harm. The recall may represent a lower risk than the consequences of untreated disease or abrupt withdrawal.

Call your pharmacy first. They can verify whether your specific dispensed lot is affected, arrange an emergency replacement prescription from an unaffected lot or a different manufacturer, and in most cases will not charge you for the replacement fill even if it comes before your normal refill date. Your insurance will generally cover an early replacement fill in a recall situation.

If you cannot reach your pharmacy and believe your medication is affected, do not simply stop. Take your last available doses and contact a medical provider. The urgency of stopping depends entirely on the nature of the recall defect — a labeling error carries different risk than contamination with a toxic substance, and your provider can help you weigh those factors.

FDA drug recalls happen for several distinct reasons, and understanding them helps calibrate the actual risk. Contamination with foreign particles — glass fragments, rubber from faulty vials, metal particulates from manufacturing equipment — represents a direct quality failure and is generally serious. Sub-potency or super-potency, where the dose is significantly lower or higher than labeled, matters enormously for drugs with narrow therapeutic windows like blood thinners and seizure medications.

Many drug recalls involve NDMA or other nitrosamine impurities — compounds that can form during manufacturing and that are classified as probable human carcinogens. NDMA recalls became prominent starting around 2018 and affected widely used drugs including metformin, ranitidine (Zantac), valsartan, and losartan. For NDMA contamination, FDA has generally communicated that the risk from short-term exposure is low but that continued long-term exposure should be avoided.

Labeling errors — incorrect dosing instructions, missing warnings, or mix-ups between similar product names — are also common recall triggers. The risk from a labeling error depends heavily on what information was wrong and whether a patient or caregiver would have acted on it.

For over-the-counter medications, the process is simple: return the product to the pharmacy or retailer where you bought it. Most pharmacies will accept OTC medication returns for recalled products even without a receipt. Some manufacturers also accept direct returns by mail and will reimburse shipping.

For prescription medications, your pharmacy handles the replacement. If your pharmacist needs a new prescription from your provider to substitute a different manufacturer's product, they can usually arrange this quickly and may be able to contact your prescriber directly on your behalf.

If you have difficulty getting a replacement for a recalled prescription medication, contact your state's board of pharmacy or the FDA's consumer complaint hotline. Patients experiencing difficulty getting urgent medication replaced during a recall have recourse through these channels.