Articles Posted in Common Errors

A doctor/medication safety specialist recently wrote an article about a common abbreviation that could lead to severely adverse consequences in patients. The article, which appears in the web version of the Pharmacy Times, discusses one common abbreviation for acetaminophen, APAP, which is based upon the chemical composition of the drug, that could lead to a deadly overdose when patients take other medications not knowing that they contain the same drug.

For example, in one case following surgery, a 56 year old man was prescribed a hydrocodone/acetaminophen combination drug, but on the label it was abbreviated Hydrocodone/APAP. The instructions said to, “take one tablet by mouth every 4 to 6 hours as needed for pain.” The patient took the medication as instructed, but had insufficient pain relief, so he began taking additional over the counter acetaminophen, and followed those instructions, taking two caplets every 4 to 6 hours as needed.

Following some four days of this combination, the patient returned to the doctor for his post-op appointment, he complained of a lack of appetite, nausea, vomiting, and abdominal pain. The doctor was able to determine that the man was taking over 8 g of acetaminophen per day. The patient told the doctor that the pharmacist did not counsel him on the daily limit of acetaminophen, and that he was unaware that his prescription also contained acetaminophen. The patient was subsequently admitted to the hospital and treated for acute hepatotoxicity, and he luckily made a full recovery.

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Ontario hospitals recently released a new report detailing some 36 incidents that occurred last year where medication-related mistakes led to patients suffering severe harm or even death.

Among the reported incidents, patients were harmed when given incredible overdoses of narcotic painkillers, received the incorrect drug, or were administered an additional (and therefore dangerous) dose.

Of all of the incidents, ten patients died, while the remaining 26 suffered harm so severe that it required life saving interventions to correct, caused a major disability, or led to a shortened life span.

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A recent article in Pharmacy Practice News discussed ways in which updated labeling standards for Heparin Sodium Injection and Heparin Lock Flush Solution may not eradicate the problems associated with overdose completely. One major reason being that some of the older problematic versions of the label remain in pharmacy stocks.

According to information on the relevant organization’s website, the new labeling requirements, which took effect this May, require that the new heparin products clearly indicate the concentration of the medication, followed by how much medication is in each milliliter (mL).

Prior labels stated the per mL amount, with the total container volume appearing elsewhere, thus leading to errors when practitioners mistook the per mL amount as the total volume in the vial. This sort of mistake led to dangerous heparin overdoses.

For example, in one case a patient died due to bleeding in the brain, which occurred as a result of two practitioners mistakenly thinking that a 10-mL vial of heparin held a total of 1,000 units, when each vial actually contained 10,000 units (1,000 units/mL). As a result, they administered 30,000 units to the patient instead of 3,000.

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A Washington woman narrowly avoided a potentially tragic prescription error, when she picked up her usual prescription for the vitamin B12. The label on both the bag and the container even contained the correct name: Cyanocobalamin.

The woman noticed that the color of the actual liquid was different, in addition to the cap on the bottle, but she dismissed her concerns as a potential change in manufacturer.

Then, as usual, the woman’s son came over to help her with the injections. After inspecting the bottle, he asked the woman about it. Fortunately, due to his prior medical training, her son realized that what the woman had was actually not the usual B12 vitamin injection, but rather the dangerous drug atropine, which is used to resuscitate patients in cardiac arrest, among other uses.

The woman had gotten the medication from the military base near her home in Virginia, which sends its prescriptions out to a national center to be filled. It was apparently the national pharmacy that made the error.

The medicine the woman was given could have killed her instantly, or at least led to a heart attack or stroke, among other side effects.

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Pharmacy and medication errors are not limited to similar looking pills getting mixed up. A recent article by a pharmacist discusses the value of having an independent verification process in place in order to prevent mix ups or misinterpretations.

For example, in one case an order for the drug “eribulin” was misinterpreted by a pharmacist and entered into the computer system as epirubicin, perhaps because of the similar spellings of the words. Fortunately in that case, a nurse discovered the error when she compared the prescription label with the original order, and as a result the patient did not receive the incorrect medication. Both of the drugs in that case are used in breast cancer treatment, which is another possible explanation for the pharmacist’s misinterpretation.

It is recommended that when the names of drugs are so similar, that hospitals and pharmacies have preventative measures in place to avoid look alike or sound alike mixups. For example, in the hospital where the mixup occurred, the hospital added additional terms to the names, and incorporated caps in the middle of the names to offset any potential misreadings. Additionally, an organization for drug safety has recommendations regarding how to list these medications to avoid other potential misreadings.

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A Seattle woman suffering from multiple sclerosis, who also recently underwent hip surgery, went to her local pharmacy to have her prescriptions filled.

When the woman went to take her pills, she noticed that something was a bit off. She knew that thecapsule was supposed to be white and green and have the numbers “293” imprinted on it, with a 250 milligram dose of her medication. Instead,however, she saw that the pill was light green and dark green, and had the number “294,” indicating that it was in fact a 500 milligram pill. It was then that she realized she had been ingesting doublethe prescribed dose for at least two days.

While it turns out that the printing and information on the label for her prescription pill bottle was correct, apparently the pharmacist at the Rite Aid where her prescription was filled gave her the incorrect dose. In a statement the woman reiterated that her doctor prescribed her medications in order to accommodate her MS, and that the potential impact on her health due to the double dosing is currently unknown.

In a statement regarding the incident, a Rite Aid spokesman stated that their company has a seven point check for accuracy for each prescription before it leaves the pharmacy. The company is now investigating to see if that procedure was followed, and will potentially require retraining for its employees.

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Several groups of doctors and health care officials are calling on the U.S. Food and Drug Administration (FDA) to modify its guidelines for opioid painkiller prescriptions. The proposed changes would include restrictions on “off-label” uses, meaning uses not explicitly approved by the FDA, and limits on the amount of time a doctor may prescribe a painkiller for a patient. The purpose of the changes would be to counter a growing rate of abuse and addiction to the powerful drugs, which has recently resulted in multiple adverse reactions and medication errors.

Abuse of prescription drugs is now the “fastest growing drug problem” in the U.S., according to the Centers for Disease Control and Prevention (CDC). The CDC says that about 27,000 people died from accidental drug overdoses in the U.S. in 2007, and an increased use, and abuse, of prescription opioid painkillers is responsible for much of that total. The government has already attempted crackdowns on “pill mills” and pharmacies that, they allege, sell painkillers to addicts without medical necessity. This includes widespread investigations of drug wholesalers that move large volumes of painkillers and other controlled medications. The latest recommendations would impact how pharmaceutical companies label and market their drugs, in addition to how doctors prescribe them.

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Handwritten prescription slips have always presented risks to patients. The risk of a pharmacist or pharmacy technician misreading a doctor’s handwriting, sometimes known as “chicken scratch” among pharmacists, leads to the risk of a misfilled prescription. This could involve the wrong dosage of a drug, or the wrong medicine entirely, with the consequences ranging from adverse side effects, worsening of a patient’s condition, or even death. New computerized systems for doctors and other medical professionals, however, join the ever-increasing number of electronic solutions to common human errors. These systems can help combat not only pharmacy errors, but also prescription fraud and prescription drug abuse.

Electronic prescriptions, or e-prescriptions (e-Rx), allow a doctor to write a prescription by submitting a request to a pharmacy online, rather than writing out the prescription on a prescription pad. A 2010 study mentioned by the New York Times, which examined handwritten prescriptions from doctors, physician assistants, and nurse practitioners in New York, found a thirty-seven percent error rate for handwritten prescriptions, not including legibility errors. The study found legibility errors in eighty-eight percent of the handwritten prescriptions. These errors can result in a patient receiving the wrong dosage or the wrong medication. They may also result in the pharmacy needing extra time to consult with the prescribing doctor or professional to sort the matter out, which could cause harm to a patient in urgent need of a particular medication.

Congress promoted the use of e-Rx in the 2009 Health Information Technology for Economic and Clinical Health Act (HITECH Act), passed as part of that year’s economic stimulus bill. The HITECH Act establishes certain acceptable uses for electronic medical records, giving regard to issues of patient privacy and the security of patients’ personally identifying information. It specifically names e-Rx as an approved use.

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The Delaware Secretary of State’s Office has suspended the Controlled Substance Registrations of two medical doctors and a nurse practitioner because of allegations that they overprescribed a number of controlled substances in unreasonable and excessive amounts. Complaints filed against the the three, who all worked in the pain management field, further allege that they disregarded evidence that some of the prescribed medications were being abused or even diverted. The suspension immediately halted their legal authority to write prescriptions. One physician and the nurse practitioner reportedly also surrendered their Drug Enforcement Agency (DEA) registrations to federal authorities. The doctors may face further disciplinary action beyond the Secretary of State’s investigation.

One of the physicians, Dr. Mohammed Niaz, worked with the nurse practitioner, Jean Binkley, as her supervisor. The Secretary of State alleges that Dr. Niaz wrote prescriptions for over 57,000 tablets of various controlled substances during the first seven months of 2011. This amount included 42,000 tablets of the Schedule II narcotic Oxycodone. Binkley is alleged to have separately written prescriptions for over 89,000 Oxycodone tablets.

The state further alleges that one patient, using prescriptions obtained from Niaz and Binkley, obtained 360 Oxycodone tablets and 90 tablets of Alprazolam within a two-week period earlier this year. This is considered an unreasonable amount for one person for such a brief period of time. Alprazolam is the generic name for the drug Xanax, a Schedule IV controlled substance used to treat anxiety, but also highly prone to abuse. Both types of drug can be highly addictive and dangerous if abused, and their distribution is strictly controlled. The state alleges that many of the drugs obtained through prescriptions written by Niaz and Binkley ended up in the hands of people who did not have a prescription and did not have guidance on how to use the drugs safely.

Dr. Patrick Titus allegedly wrote an even greater number of irregular prescriptions. One pharmacy’s records reportedly showed 3,941 prescriptions written by Dr. Titus between January and November 2011, accounting for almost 750,000 pills of seventeen Schedule II narcotic pain medications such as Oxycodone, Oxycontin, and Morphine.

The Secretary of State launched an investigation with the assistance of the Delaware Attorney General’s office and the Division of Professional Regulation. Delaware law empowers the Secretary of State to revoke a medical professional’s license to prescribe medicine if “continued registration would be inconsistent with the public interest.” The Secretary of State’s reasoning in this case seems to be that these three medical professionals have established a sufficiently questionable prescription history, and that they would constitute a threat to the public interest if allowed to continue writing prescriptions.

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