What was recalled
The U.S. Food and Drug Administration (FDA) has issued a Class II recall against specific batches of Cyanocobalamin injection USP, 1,000 mcg/mL, manufactured by American Regent, Inc. This medication is strictly intended for intramuscular (IM) or subcutaneous (SC) use only, meaning it must be injected into muscle tissue or the layer of fat just beneath the skin, and never administered through other routes. The recall specifically targets two distinct packaging configurations of this drug: single-use 1 mL multi-dose vials identified by National Drug Code (NDC) 0517-0031-01, and larger packages containing 25 of these same 1 mL multi-dose vials, identified by NDC 0517-0031-25. It is important to note that while the term "multi-dose" might suggest a bottle meant to be used over several days or weeks, the FDA classification and the nature of the contamination hazard require extreme caution with any opened or unopened unit from these specific lots.
The products subject to this recall are prescription-only medications produced by American Regent, Inc., located in Shirley, New York, 11967. The recall encompasses two specific lot numbers that have been distributed nationwide within the United States. The first affected lot is number 24297, which carries an expiration date of August 31, 2026. The second affected lot is number 24364, with an expiration date of October 31, 2026. Because these are pharmaceutical products distributed across the entire country, they may currently be in the inventory of hospitals, clinics, pharmacies, or potentially in the possession of patients who have been prescribed these medications prior to their administration.
A Class II recall by the FDA indicates a situation where the use of or exposure to the defective product is not likely to cause serious adverse health consequences or death, but could cause temporary or medically reversible adverse health problems. In this instance, the defect involves the presence of particulate matter within the liquid solution. The foreign materials identified in these vials include hair, glass fragments, and/or paraformaldehyde. This contamination occurred during the manufacturing process at the Shirley facility. If you have received a prescription for Cyanocobalamin injection USP 1,000 mcg/mL from American Regent, it is critical that you verify the lot number on your vial against the numbers listed above to determine if your specific product is part of this recall.
While the recall notice does not explicitly state the total number of individual units sold or distributed, the inclusion of both single-pack (NDC 0517-0031-01) and multi-pack (NDC 0517-0031-25) formats suggests a significant volume of product is involved. The distribution pattern is nationwide, meaning that patients in any state could potentially be affected. The remedy for this recall has not been detailed in the initial FDA report, so it is essential for healthcare providers and patients to contact their pharmacy or prescribing physician immediately to determine the next steps for handling these specific vials.
The hazard, explained
When you receive a prescription injection, your trust is placed in the sterile integrity of the product inside that vial. In this specific recall by American Regent, Inc., that trust is compromised by the presence of particulate matter—tiny, solid foreign objects suspended within the liquid solution. The FDA has identified these contaminants specifically as hair, glass, and/or paraformaldehyde. To understand why this is dangerous, we have to look at what happens when a medication is supposed to be pure versus what occurs when it is not.
Cyanocobalamin, commonly known as Vitamin B12, is a clear, colorless solution designed to be absorbed directly into your muscle tissue (intramuscular) or under the skin (subcutaneous). The body is remarkably efficient at handling dissolved substances, but it has no natural defense mechanism for filtering out solid particles once they bypass the skin barrier. When particulate matter is present, it means the manufacturing or packaging process failed to maintain sterility or filtration standards. Hair and glass shards are macroscopic or microscopic physical intruders that should never exist in an injectable fluid. Paraformaldehyde, a polymer of formaldehyde, is particularly concerning because it indicates potential chemical contamination or degradation, which can alter the pH balance and toxicity profile of the drug.
The physical harm occurs through two primary pathways: mechanical obstruction and biological reaction. If glass particles are present, they act like microscopic shards. When injected, these sharp fragments can lodge in small blood vessels, causing micro-emboli that block blood flow to tiny areas of tissue. This can lead to localized inflammation, pain, and in rare but serious cases, tissue necrosis (death) where the blood supply is cut off. Hair fibers, while less sharp than glass, are organic material that the body recognizes as foreign. The immune system will immediately attack these intruders, triggering a robust inflammatory response. This can result in severe swelling, abscess formation at the injection site, or systemic allergic reactions.
Furthermore, paraformaldehyde is a known irritant and toxic substance. If it has leached into the solution, injecting it introduces a chemical hazard directly into your bloodstream or muscle tissue. This can cause immediate chemical burns at the injection site, severe pain, and potentially long-term systemic toxicity depending on the concentration. Unlike a typical side effect of a medication, which is usually dose-dependent and predictable, particulate contamination is random and unpredictable. One vial might have a harmless speck, while another contains a cluster of fibers or sharp glass, making every injection from these lots a potential health risk. The body’s natural ability to clear small particles via the lymphatic system is overwhelmed when the load is too high or the particles are too large or reactive, leading to chronic inflammation or acute injury.
In summary, the hazard here is not that the Vitamin B12 itself is harmful—it is a vital nutrient—but that the vehicle delivering it has been poisoned with physical and chemical contaminants. These impurities turn a routine therapeutic injection into a direct threat to your vascular and immune systems, bypassing the body’s first line of defense entirely.
Who is most at risk
To understand who is truly vulnerable in this recall, we first need to look at what Cyanocobalamin actually is and how it is used. This medication is a synthetic form of Vitamin B12, prescribed primarily to treat deficiencies that can cause anemia, nerve damage, and fatigue. It is not an over-the-counter supplement you might casually pick up for general wellness; it is a prescription-only drug (Rx only) administered via injection. The specific items recalled by American Regent, Inc. are designed for Intramuscular (IM) or Subcutaneous (SC) use. This means the medication is injected directly into muscle tissue or just under the skin. Consequently, the primary group "at risk" here is not the general public walking down the street, but rather two distinct subsets of people: those who have been prescribed this specific lot of medication and are currently holding it, and the healthcare professionals who are administering these injections.
For patients who currently possess or are scheduled to receive these vials (NDC 0517-0031-01 or 25, from lots 24297 and 24364), the risk is immediate and physical. Because the contamination involves particulate matter—specifically identified as hair, glass, and/or paraformaldehyde—the danger lies in what enters your body when the needle pierces your tissue. If you have a chronic condition requiring regular B12 shots, such as pernicious anemia or certain gastrointestinal disorders that prevent absorption through the gut, you are part of the core user base. You are at risk because your treatment plan relies on this exact delivery method. If an injection contains foreign particles, those particles do not dissolve; they remain in your bloodstream or tissue, potentially causing blockages, inflammation, or embolisms depending on where they travel.
Among patients, certain demographics face heightened vulnerability. Elderly individuals, who are more likely to suffer from age-related B12 deficiencies and thus be long-term users of injectable therapies, may have more fragile capillary systems. Introducing glass shards or hardened chemical residues like paraformaldehyde into their circulation poses a significant threat to small blood vessels. Similarly, individuals with compromised immune systems are at greater risk because the body’s ability to wall off or react to foreign contaminants is weakened. For these patients, a localized reaction could escalate quickly into a systemic infection or severe inflammatory response.
We must also consider the healthcare providers in New York and nationwide who handle these multi-dose vials. Nurses, home health aides, and doctors are at risk of exposure during the preparation phase. If particulate matter is visible in the vial before injection, it serves as a warning sign that the sterility and integrity of the drug have been compromised. However, if particles are microscopic or not immediately obvious, the provider may unknowingly administer a contaminated dose. This makes healthcare workers who regularly dispense or inject Cyanocobalamin particularly critical to monitor during this recall period. Their professional judgment is their first line of defense, but their patients’ safety depends on that judgment being accurate and timely.
- Patients with diagnosed B12 deficiencies: Those actively using these specific lots for treatment.
- Elderly individuals: Who may have more fragile vascular systems susceptible to particulate blockage.
- Immunocompromised patients: Who are less able to fight off secondary infections from contaminated injections.
- Healthcare administrators in NY and nationwide: Who must identify and quarantine these specific lot numbers immediately.
How to tell if you have the recalled item
When dealing with a pharmaceutical recall, particularly one involving injectable medications like Cyanocobalamin, precise identification is your first line of defense against potential harm. Because this issue involves particulate matter contamination—specifically hair, glass, and/or paraformaldehyde—the physical appearance of the vial itself may not immediately reveal the problem without close inspection of the label details. You must rely on the specific lot numbers, National Drug Codes (NDCs), and expiration dates to confirm whether your stock is part of this recall. Do not assume that all American Regent Cyanocobalamin products are affected; only the specific lots identified in the FDA’s official notice are subject to this Class II recall.
Start by locating the vial itself. The recalled product is Cyanocobalamin injection USP, 1,000 mcg/mL, intended strictly for Intramuscular (IM) or Subcutaneous (SC) use only. It is packaged in two specific configurations: either a single 1 mL Multi-Dose Vial or a carton containing 25x1 mL Multi-Dose Vials. Look closely at the label for the manufacturer, American Regent, Inc., located in Shirley, NY 11967. The key identifiers you need to verify are the NDC numbers and the lot numbers printed on the vial labels or the outer carton.
Check your inventory against the following specific details. The recall affects items with the NDC 0517-0031-01 (for the single 1 mL vial) and NDC 0517-0031-25 (for the 25-pack). Within these packages, you must check the Lot numbers. The recall specifically targets two lots:
- Lot #24297, with an expiration date of 8/31/2026.
- Lot #24364, with an expiration date of 10/31/2026.
If your vials match these lot numbers and expiration dates, they are part of the recall. If you have a different lot number or a different expiration date, this specific recall does not apply to your product, though it is always wise to check for other general safety notices. Since the distribution was nationwide within the U.S., the location where you purchased the drug does not help identify it; only the printed codes on the packaging matter. Remember that these products are prescription-only (Rx), so if you are a healthcare provider or pharmacy, conduct a thorough physical audit of your stock immediately. For patients, do not use the medication until you have confirmed the lot number with your pharmacist or healthcare provider. The presence of particulate matter cannot be seen with the naked eye in all cases, so visual inspection of the liquid alone is not sufficient to determine safety; you must rely on the printed lot data.
What to do — step by step
If you are a healthcare provider, distributor, or patient who has been using Cyanocobalamin injection USP from American Regent, Inc., the most critical immediate action is to stop using the affected product right now. Because this recall involves Class II hazards—specifically the presence of particulate matter such as hair, glass, and paraformaldehyde within the vials—the risk of serious medical complications is significant. Particulates in injectable medications can cause blockages in small blood vessels, trigger severe inflammatory responses, or introduce toxic substances directly into your muscle or subcutaneous tissue. Therefore, do not attempt to filter the solution or "inspect" a vial for clarity before use; visual inspection alone cannot guarantee safety, especially with microscopic glass fragments or chemical contaminants like paraformaldehyde.
Since the official recall notice does not specify a detailed remedy or return process, you must take proactive steps to secure your own safety and resolve the issue. First, locate the specific vials in your possession. You need to check the National Drug Code (NDC) numbers 0517-0031-01 and 0517-0031-25, which correspond to the 1 mL Multi-Dose Vial and the case of 25x1 mL Multi-Dose Vials, respectively. Crucially, verify the lot numbers against those identified in the recall: Lot 24297 (expiration date 8/31/2026) and Lot 24364 (expiration date 10/31/2026). If your product matches these identifiers, it is part of the affected batch.
Next, contact American Regent, Inc., the manufacturer located in Shirley, NY. While the recall summary does not list a direct phone number or website for returns, you should reach out to their customer service or regulatory affairs department immediately to inquire about the specific return protocol. Ask them directly how to dispose of the product safely and whether they are offering refunds, replacements, or credit memos. If you are a healthcare facility, ensure that all unused units are quarantined in a secure area to prevent accidental administration. Do not simply throw them in the regular trash, as pharmaceutical waste disposal often requires specific hazardous material handling procedures.
If you are a patient who has already received this medication but has not yet used it, contact your pharmacist or prescribing physician immediately. They can help you identify alternative sources of Cyanocobalamin that are safe to use and may assist in facilitating a return or exchange with the pharmacy where the prescription was filled. Keep all original packaging and documentation handy when you speak with representatives from American Regent or your healthcare provider, as this information will be essential for processing any potential refund or replacement. Remember, your health is the priority; if you have already used the product and experience any unusual symptoms such as pain at the injection site, swelling, fever, or difficulty breathing, seek medical attention promptly and inform your doctor about the potential exposure to particulate contamination.
Your refund, repair, or replacement options
When you encounter a product recall involving medication, the most immediate question is often, "What do I do now, and how do I make this right?" In the case of the American Regent, Inc. recall regarding Cyanocobalamin injection USP, it is important to approach the situation with a clear head and realistic expectations. The official FDA recall announcement for this specific hazard—contamination with particulate matter such as hair, glass, or paraformaldehyde—does not explicitly list a standard remedy like a refund, repair, or replacement in the provided public records. This absence of stated terms can feel unsettling, but it is actually quite common in pharmaceutical recalls, particularly those classified as Class II. Understanding why the remedy is not immediately visible helps you navigate the next steps with confidence rather than confusion.
First, it is crucial to understand that pharmaceutical manufacturers often handle remedies differently than consumer goods companies. You cannot "repair" an injection vial, and a simple "refund" at a pharmacy counter is rarely the standard procedure for prescription drugs contaminated with foreign particulates. Instead, the primary mechanism for resolution is typically the return of the product to the manufacturer or their authorized distributor for proper disposal and credit adjustment. However, because the specific contact details and return instructions are not included in the general recall summary, you must take proactive steps to locate them. The key to unlocking your options lies in the National Drug Code (NDC) numbers provided in the recall notice: NDC 0517-0031-01 for the single 1 mL multi-dose vial and NDC 0517-0031-25 for the case of 25 vials. These codes are your unique identifiers.
To determine your specific refund or replacement options, you should first contact the pharmacy where you purchased or filled the prescription. Pharmacists have direct lines to pharmaceutical distributors and can often initiate a product return or credit process on your behalf without you needing to handle the physical product yourself. If you are a healthcare provider or work in a facility that uses these lots (Lot #24297 expiring 8/31/2026, or Lot #24364 expiring 10/31/2026), your procurement department should reach out to American Regent, Inc. directly. You can find their official contact information on the FDA’s official recall database page for this specific announcement or by visiting the American Regent website under their "Contact Us" or "Product Information" sections. They will provide detailed instructions on how to return the contaminated stock.
If you are a patient who has already used some of the medication, do not attempt to seek a partial refund through standard channels for the used portion. The safety hazard here is the priority, not the financial transaction. Your focus should remain on ensuring that no further doses are administered from the recalled lots. The "remedy" in this context is primarily the removal of the hazardous product from the supply chain and your personal possession. Any compensation or credit for unused vials will be arranged directly between your pharmacy or healthcare provider and American Regent, Inc., based on their internal recall execution plan which is not publicly detailed in the general hazard summary. Stay calm, verify your lot numbers carefully, and let your healthcare provider guide you through the administrative side of this process.
What can happen if you ignore it
When a medication carries a Class II recall due to the presence of foreign particulate matter—specifically hair, glass, and paraformaldehyde—the decision to continue using the product is not merely an inconvenience; it is a direct threat to your physiological stability. Cyanocobalamin (Vitamin B12) injections are typically administered intramuscularly (IM) or subcutaneously (SC), meaning the solution bypasses the protective barriers of the digestive system and enters the tissue or bloodstream directly. This route of administration amplifies the risk profile significantly compared to oral supplements. If you ignore this recall and continue to use the affected lots, you are essentially introducing unverified foreign objects into your body with every dose.
The risks associated with particulate matter in injectable drugs are multifaceted and can range from immediate local trauma to systemic complications. First, consider the physical presence of glass shards or hair fibers. Glass is rigid and sharp. If even microscopic fragments are suspended in the vial, they can cause micro-trauma to the tissue at the injection site, leading to localized inflammation, pain, abscesses, or granulomas (small areas of inflammation). Over time, repeated exposure can lead to chronic scarring or tissue necrosis. Hair fibers, while less sharp than glass, are organic and porous. They can trap bacteria and other contaminants that may not be visible to the naked eye, turning a sterile injection into a potential vector for infection.
More critically, we must address the chemical hazard: paraformaldehyde. Paraformaldehyde is a polymer of formaldehyde, a known irritant and toxic substance. In pharmaceutical contexts, trace amounts can sometimes be present as residuals from manufacturing processes or sterilization methods, but their presence here is flagged as a contamination event rather than an expected byproduct. When injected directly into muscle or subcutaneous tissue, paraformaldehyde can cause severe local irritation, chemical burns, or inflammatory reactions. If particles are small enough to pass through capillary walls and enter the bloodstream, the risks escalate. The body’s immune system will recognize these foreign particles as threats, potentially triggering an acute inflammatory response. In rare but serious cases, emboli (blockages in blood vessels) can occur if larger particulates travel to sensitive areas, though this is more common with IV lines; however, the systemic burden of inflammation and immune activation remains a valid concern.
Furthermore, ignoring the recall undermines the integrity of your treatment. You are paying for a sterile, precise dose of Vitamin B12, but you are receiving an unknown mixture of contaminants. This not only fails to provide the intended therapeutic benefit reliably but also adds unnecessary metabolic stress to your body as it attempts to filter and respond to these foreign agents. There is no "wait and see" approach with injectable medications contaminated with glass or toxic chemicals. The potential for acute pain, infection, or long-term tissue damage far outweighs any perceived benefit of using stock you already have. Your health is not worth the gamble on a product that has been confirmed to lack basic sterility and purity standards.
Staying safe: broader tips
When you are managing medications at home, particularly injectable drugs like cyanocobalamin (vitamin B12), establishing a routine for storage and inspection is your best defense against unexpected complications. While the specific recall we discussed earlier highlights a rare manufacturing error involving particulate matter, the broader principle of vigilance applies to all pharmaceuticals. Always store your medications exactly as directed on the label or by your pharmacist. For many injectables, this means keeping them at room temperature away from direct sunlight and moisture, which can degrade the chemical integrity of the drug over time. If a medication looks cloudy, discolored, or contains visible particles that shouldn’t be there, do not use it. Your eyes are a simple but effective first line of defense; if something looks wrong, trust that instinct and consult your healthcare provider before proceeding.
It is also crucial to understand the difference between expiration dates and lot-specific recalls. An expiration date tells you when the manufacturer guarantees full potency under proper storage conditions, but it does not account for manufacturing defects that might occur in a specific batch. This is why signing up for FDA safety alerts or checking the FDA’s official recall database regularly is so important. You can subscribe to email notifications from the FDA to get immediate updates on drug recalls relevant to your health needs. This proactive step ensures that you are among the first to know if a product you currently possess has been flagged, allowing you to act quickly rather than reacting after a problem arises.
Furthermore, maintain open communication with your healthcare team about any adverse effects you experience, no matter how minor they may seem. If you have used a medication and notice unusual symptoms—such as irritation at the injection site, unexpected allergic reactions, or other systemic issues—report these to your doctor immediately. In the United States, you can also report side effects or product problems directly to the FDA’s MedWatch program. This feedback loop helps regulatory agencies identify patterns that might indicate a broader safety issue before it affects thousands of people. By staying informed, storing medications correctly, and reporting concerns, you transform from a passive consumer into an active participant in your own safety net.
- Always inspect clear liquids for particles or discoloration before use.
- Store injectables according to package instructions to preserve stability.
- Register for FDA recall alerts via their official website.
- Report adverse events to MedWatch to help protect others.