Using Two Patient Identifiers in the Pharmacy for Safety: How It Prevents Medication Errors

Using Two Patient Identifiers in the Pharmacy for Safety: How It Prevents Medication Errors

Every year, thousands of patients in the U.S. get the wrong medication-not because a pharmacist made a careless mistake, but because someone was misidentified. A man named John Smith gets his blood pressure pill. Another John Smith, with the same birthday and same last name, gets the wrong one. That’s not hypothetical. That’s happening in pharmacies right now. The fix isn’t fancy. It’s simple: use two patient identifiers every single time you hand out a prescription.

Why Two Identifiers? It’s Not Just a Rule-It’s a Lifesaver

The Joint Commission made this a national patient safety goal back in 2003. They didn’t do it because they liked paperwork. They did it because people were dying. A 2020 study in JMIR Medical Informatics found that up to 10% of serious drug interaction alerts go unnoticed-not because the system failed, but because the patient’s identity wasn’t confirmed correctly. That means someone with a known allergy to penicillin could get it. Someone on blood thinners could get a new drug that turns their blood to water. These aren’t rare mistakes. They’re preventable ones.

Using two identifiers means you don’t rely on just a name. You don’t rely on a room number. You don’t rely on a guess. You use two things that belong only to that person: their full legal name and date of birth. Or their name and medical record number. Or their name and phone number. Anything that ties directly to them. Room number? Not valid. Hospital wing? Not valid. Even if the nurse says, “He’s in 304,” that’s not enough. It’s not about convenience. It’s about making sure the right person gets the right pill.

Manual Checks Alone Aren’t Enough

You might think, “I ask for their name and DOB. That’s enough.” But human memory is messy. Staff are tired. Patients get confused. One pharmacist in Calgary told me, “I’ve had patients say, ‘I’m 42,’ when they’re 52. I didn’t catch it because I was rushing.” That’s not negligence-it’s systemic pressure.

A 2023 survey by the American Society of Health-System Pharmacists found that 63% of pharmacists admit to occasionally skipping full verification during peak hours. Why? Because it takes time. But here’s the truth: skipping verification doesn’t save time-it costs more. One wrong medication can mean an ER visit, a hospital stay, a lawsuit. The cost of a single error? Often over $20,000. The cost of a death? Unmeasurable.

Technology Makes It Work

Barcode scanning changed everything. When a pharmacist scans the patient’s wristband and the medication’s barcode, the system checks: Is this the right drug? Is this the right patient? Is this the right dose? Is this the right time? All in two seconds.

A 2012 study in the Journal of Patient Safety showed that after hospitals started using barcode systems, medication errors reaching patients dropped by 75%. That’s not a small number. That’s thousands of lives saved every year. Biometric systems like palm-vein scanners-used in some hospitals-have a 94% accuracy rate. Compare that to hospitals without them: only 17% accuracy in matching patients to records. That’s not a tech upgrade. That’s a safety revolution.

Even small pharmacies can use low-cost solutions. Many pharmacy software systems now let you scan a QR code on the patient’s insurance card to pull up their record. No need for wristbands. No need for expensive hardware. Just a phone or tablet. If your pharmacy doesn’t have this, ask why.

Two pharmacy workers verifying ID as ghostly misidentified patients fade away, with duplicate records crumbling in the background.

What Happens When You Don’t Use Two Identifiers?

Let’s look at a real case. A man was transferred from an out-of-town ER to a Calgary hospital. He was unconscious. The admitting staff couldn’t find his record. So they created a new one. Days later, they realized he already had a record-but under his middle name, not his first. That old record listed a life-threatening allergy to sulfa drugs. The new record didn’t. He got a sulfa-based antibiotic. He went into anaphylaxis. He survived. But he didn’t have to.

This isn’t an outlier. The Office of the National Coordinator for Health IT says 8-12% of patient records in hospitals without good identification systems are duplicates. That means one person might have three or four medical files. One for each doctor. One for each hospital visit. Each with different allergies, different meds, different diagnoses. It’s chaos. And pharmacies are on the front lines.

Why Double Checking Doesn’t Always Work

Some pharmacies try to fix errors by having two staff members verify the prescription. “Two heads are better than one,” they say. But a 2020 review in BMJ Quality & Safety found no solid proof that this reduces errors. Why? Because both people often check the same screen, read the same name, and miss the same mistake. It’s not independent verification-it’s groupthink.

The real fix isn’t more people. It’s better systems. One person using two identifiers with a barcode scanner is safer than two people guessing from memory.

QR code scanned by skeletal tablet connecting to a glowing patient profile, while a 'Room 304' shadow dissolves into smoke.

Implementation Isn’t Hard-It Just Takes Discipline

You don’t need a million-dollar IT project. Start small. Pick one area: the high-alert meds. Warfarin. Insulin. Opioids. Make sure every single one gets verified with two identifiers and documented. Then expand.

Training matters. Don’t just hand out a policy. Show videos. Role-play scenarios. Let staff practice with fake patients. Ask them: “What if the patient says their birthday is wrong? What do you do?”

Document everything. The Joint Commission found that 37% of non-compliant pharmacies didn’t even record the verification. If you didn’t write it down, it didn’t happen. That’s not just bad practice-it’s a liability.

What’s Next? The Future of Patient ID

In January 2025, a pilot program launched in five U.S. health networks to test a universal patient identifier. It’s not a Social Security number. It’s not a driver’s license. It’s a unique, encrypted code tied to the person-not the system. If it works, it could eliminate duplicate records forever.

But you don’t have to wait. Right now, you can do something that will save lives:

  • Use two identifiers on every prescription-no exceptions.
  • Use barcode scanning if you have it.
  • Don’t accept room numbers, locations, or nicknames.
  • Document every verification.
  • Train new staff on day one.

Final Thought: This Isn’t About Compliance. It’s About Care.

The Joint Commission doesn’t care if you check off a box. The patient doesn’t care if you followed protocol. They care if they got the right pill. If they lived. If they didn’t end up in the ER because someone skipped a step.

In pharmacy, you’re not just dispensing medicine. You’re holding someone’s life in your hands. Two identifiers isn’t a rule. It’s your promise.

Cyrus McAllister
Cyrus McAllister

My name is Cyrus McAllister, and I am an expert in the field of pharmaceuticals. I have dedicated my career to researching and developing innovative medications for various diseases. My passion for this field has led me to write extensively about medications and their impacts on patients' lives, as well as exploring new treatment options for various illnesses. I constantly strive to deepen my knowledge and stay updated on the latest advancements in the industry. Sharing my findings and insights with others is my way of contributing to the betterment of global health.

View all posts by: Cyrus McAllister

RESPONSES

Bruno Janssen
Bruno Janssen

Been there. Saw a guy get metformin instead of lisinopril because the tech just went by the name. Guy ended up in the ER with a BP of 210/120. No one apologized. Just shrugged and said, "We were busy."
Now I scan everything. Even if it takes 10 extra seconds. Lives over paperwork.

  • December 13, 2025

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