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The importance of pharmacology in nursing

Pharmacology and medication knowledge in nursing
Photo: The importance of pharmacology in nursing
Nurses play an integral role in administering medication to patients, and depending on the environment in which they work, could be doing so as often as every few minutes.

As a result, it’s imperative that nurses have a solid understanding of pharmacology, and potentially fatal drug interactions.

“The nurse’s role in administering medication in a hospital environment is broad,” says Registered Nurse and academic Dr Jessica Stokes-Parish.

“As a nurse you will check the medication dosing and administration route, amongst other things such as the time to be administered.

“A nurse can also ‘nurse-initiate; medications, such as paracetamol, in some facilities as they are deemed low-risk.
“What this means is a nurse can determine if the medication is appropriate and prescribe the medication for administration.”

Administrating medication

The word ‘nurse’ can mean a variety of things, including an Assistant in Nursing, an Enrolled or Endorsed Enrolled Nurse or Registered Nurse.

An Endorsed Enrolled Nurse and Registered Nurse can administer medications, says Dr Stokes-Parish, while an Enrolled Nurse can only do so if they have completed the relevant education.

“In some aged care facilities, Endorsed Assistants in Nursing are allowed to dispense medications from a Webster Pack,” says Dr Stokes-Parish.

“Some nurses may have restrictions on administration due to errors or infringements.”

Education is included in nurse training programs, pre-registration.

“Medication competencies are a part of yearly assessments to provide you with refresher training on medication calculations and a variety of other things.

“A good understanding of pharmacology is essential to the safe administration of medications.

“Whilst you aren’t expected to know every single medication off the top of your head, a basic understanding of the class of medications, the broad classification and to know where to look to find information are key to a good understanding.”

Areas that you could consider focusing on are:

- Why do medication errors occur?
- What are the contributing factors to medication errors?
- Which drug classes do I need to improve my knowledge of?
- What strategies could be implemented in the workplace to reduce error?

There are six rights of medication administration that nurses need to refer to before they give the patient their medicine:

• Right Drug: double check the prescription, medication and expiry date on the medicine.
• Right Patient: confirm the patient by a minimum of two identifiers, such as their name and date of birth. Also ensure they have an understanding of what the medication is and any possible side effects.
• Right Dosage: confirm the dosage using a current drug reference. If unconfirmed, then calculate the dosage and double check with another nurse or doctor.
• Right Time: confirm how often the medicine is to be administered and check with the patient when they had their last dosage.
• Right Route: ensure the appropriateness of the route ordered and whether the patient can receive the medication from this route.
• Right Documentation: document the administration of the medication as soon as it has been administered. Using professional clinical software can guarantee consistency.

Drug interactions

Drug interactions are a key consideration when administering a medication.  A drug interaction is where the active component of the medication might interfere or interact with another drug or product.

For example, a patient that has multiple comorbidities and is on multiple medications is at higher risk of adverse drug events. As a practical example, many herbal medicines interact with warfarin, which increases the risk of bleeding.

“If you have no knowledge of the medications and interactions, you are less likely to understand what a fatal drug interaction is,” says Dr Stokes-Parish.

“A good example is the interaction between clarithromycin and calcium-channel blockers (like amlodipine) - administering these together can cause hypotension and acute renal failure.”

In the worst-case scenario, a patient might die. In the best-case scenario, nothing occurs as a result. However, the risk increases when there are more medications administered.

“Some drug interactions are beneficial. For example, in the case of paracetamol and oxycodone, the paracetamol enhances the uptake of oxycodone, making the pain relief more effective.”

There are a number of factors that might contribute to a nurse delivering the wrong medication.

The medication order might be barely legible, making the dosage difficult to read. Or perhaps you have received a verbal order, which you may have interpreted incorrectly, which is why a second check is required for phone orders.

“Other errors are related to the medication and the packaging itself,” says Dr Stokes-Parish.

“Medicine cabinets are large, with high volumes of medication, which can make decision-making difficult.

“Some medication packaging is identical - there are frequently reported cases of ‘look alike, sound alike’ packaging issues. These errors are more likely to occur when you are time pressured and/or inexperienced with the medication you are administering.”

If you are pressed for time and the environment does not support good decision-making, you are likely to make a mistake.

What to do in an emergency

In the case of a negative drug interaction, follow the DRSABC algorithm - ensure the area is safe and that there is a response from your patient.

Send for help by notifying your senior staff and medical staff. If the patient is unconscious, then make a Medical Emergency Team (MET) call.

“Assess the airway, breathing and circulation and keep note of their function over a period of time,” says Dr Stokes-Parish.

“You may need to lodge an incident report, and you will need to document the event in the patient’s progress notes.”

Improving knowledge of medication

As a health care provider, nurses have a duty to stay updated about medical advancements and pharmaceutical drugs.

“Make specific goals for your learning,” says Dr Stokes-Parish.

“If you have a particular area you want to improve in, focus on that with developing a specific outcome that you would like to achieve. Set a time frame to achieve this, and regularly check up on yourself.

Improving knowledge about medication requires action from nurses, such as;

• Continue with education, with short courses that also provide contact hours and receive a Continuing Education Unit (CEU).
• Study drug information which can be accessed online and outlines precautions, side effects, interactions, dosage instructions, potential diagnoses a nurse can make and teachings for patients and carers.
• Access practice resources, such as practice guidelines and legal information, as well as text books which cover drug information, nursing skills in communication, and critical thinking.
• Increase their CPD hours, study online about drug interactions and administering medication successfully.
• Attend seminars aimed at nurses to update them about medicines.

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Nicole Madigan

Nicole Madigan is a widely published journalist with more than 15 years experience in the media and communications industries.

Specialising in health, business, property and finance, Nicole writes regularly for numerous high-profile newspapers, magazines and online publications.

Before moving into freelance writing almost a decade ago, Nicole was an on-air reporter with Channel Nine and a newspaper journalist with News Limited.

Nicole is also the Director of content and communications agency Stella Communications (www.stellacomms.com) and a children's author.