PRN (“as needed”) pain medications are extremely common in long-term care and assisted living facilities. While these medications provide important flexibility for managing pain, vague or incomplete prescribing instructions can create confusion, inconsistent treatment, and possibly patient harm. Patient safety and regulatory compliance are two important principles why you should pay attention to PRN medications without parameters.

One of the most common problems is the use of multiple PRN analgesics without parameters indicating which medication should be used first. For example, a resident may have orders for acetaminophen, tramadol, and oxycodone without any guidance on when each should be administered. One nurse may choose acetaminophen first, while another immediately administers oxycodone for the same pain complaint. This inconsistency can lead to undertreatment, overtreatment, or unnecessary opioid exposure.

My preferred method is to try to reduce polypharmacy and reduce the number of PRN medications available. If that is unreasonable, parameters should be obtained to simplify things for the staff. Pain severity parameters are one of the most effective ways to address this issue. A simple approach might include:

• Mild pain (1–3): Acetaminophen
• Moderate pain (4–6): Tramadol
• Severe pain (7–10): Oxycodone

These parameters provide staff with a logical escalation strategy while encouraging the use of lower-risk analgesics before stronger opioids whenever clinically appropriate.

I’ve seen numerous cases of duplicate opioids being prescribed. My first goal is to discontinue one of the opioids, but parameters become even more important in the rare case where the provider feels both need to be continued. Orders for hydrocodone and morphine without clear differentiation increase the risk of duplicate opioid administration, overdose, and excessive sedation. Pharmacists reviewing medication regimens should identify these situations and recommend clarification.

Clear PRN instructions also improve communication among nursing staff. In long-term care, multiple nurses may care for the same resident over several shifts. Well-defined parameters reduce variation in practice and help ensure more consistent pain management regardless of who is working.

From a regulatory standpoint, surveyors frequently review PRN medication orders. Ambiguous directions such as “take as needed for pain” may generate questions regarding appropriate medication selection. Facilities that establish clear medication-use parameters demonstrate a more systematic approach to medication management and resident safety.

Consultant Pharmacists play an important role in identifying opportunities to improve PRN orders. Here are a few important things that I look to address.

• Multiple PRN pain medications have distinct indications.
• Pain severity ranges are clearly defined.
• Duplicate opioid therapy has been minimized.
• Non-opioid options are prioritized when appropriate.
• Nursing staff can easily determine which medication should be administered first.

If you are looking for more practical information on consulting pharmacy, check out my Insider’s Guide to LTC Consulting!