Pain Management — PQRST, Analgesics, and Multimodal Care | Nursing Pharmacology

Before We Start

Pain management — the nursing obligation to treat suffering and prevent harm simultaneously

Pain is the fifth vital sign — it is assessed with every vital sign check and documented as a clinical finding. The nurse's role in pain management goes far beyond handing a patient a pill: it involves accurate assessment, selecting the right intervention, monitoring the response, preventing complications, and educating patients about managing pain safely at home.

Pain management sits at a genuine clinical tension: undertreated pain causes suffering, impairs healing, and leads patients to addiction-prone self-medication. Overtreated pain — especially with opioids — causes respiratory depression, sedation, falls, and death. The nurse navigates this tension with assessment skill, knowledge of pharmacology, and clear clinical thinking.

💡 The WHO Pain Ladder

The World Health Organization's analgesic ladder guides pain treatment in three steps:

Step 1 — Mild pain (1–3/10): Non-opioid analgesics — acetaminophen (Tylenol), NSAIDs (ibuprofen, naproxen, ketorolac)
Step 2 — Moderate pain (4–6/10): Weak opioids — tramadol, codeine, low-dose oxycodone
Step 3 — Severe pain (7–10/10): Strong opioids — morphine, hydromorphone, fentanyl, oxycodone

The principle: start at the appropriate step for the pain intensity, adjust up or down based on response, and use non-opioid adjuncts at every step to minimize opioid dose.

Assessment First

Pain assessment — what nurses measure and why every element matters

PQRST Pain Assessment

Five dimensions of pain that guide treatment decisions

A complete pain assessment goes beyond "rate your pain 1–10." The number tells you severity; it does not tell you what is wrong or what to do about it. PQRST gives you the clinical picture:

P — Provocation/Palliation: What makes it worse? What makes it better? (Movement, breathing, pressure, rest, heat, cold, position)

Q — Quality: What does it feel like? (Sharp = often musculoskeletal; crushing = cardiac; burning = neuropathic; colicky/crampy = visceral/GI; throbbing = vascular or migraine)

R — Region/Radiation: Where is it? Does it go anywhere? (Cardiac pain radiates to jaw, left arm; renal colic to groin; appendicitis starts periumbilical then migrates to RLQ)

S — Severity: Rate it 0–10. But also: compare to prior pain, assess functional impact — can the patient breathe deeply, move, or sleep?

T — Timing: When did it start? Constant or intermittent? Getting better or worse? What is the pattern?

Why quality matters pharmacologically: Neuropathic pain (burning, shooting, electric) does not respond well to traditional opioids — it responds better to gabapentin, pregabalin, tricyclic antidepressants, or SNRIs. A nurse who identifies burning neuropathic pain and requests an opioid adjustment is missing the target — the provider needs to know the pain quality to prescribe appropriately.

💊 "Burning, shooting pain down the leg after back surgery = neuropathic pain." This patient needs gabapentin or pregabalin more than more opioids. Reporting the pain quality, not just the number, is what gets the right treatment ordered. "Pain 7/10" tells the provider very little. "Sharp, shooting pain down the right leg from the surgical site, worsened by movement, 7/10" is clinical information they can act on.

Reassessment — the nursing responsibility that closes the loop

Every pain intervention must be followed by a reassessment of effectiveness

Giving a pain medication without reassessing its effect is incomplete care. The reassessment determines whether the treatment worked, whether the dose was adequate, and whether complications are developing.

Reassessment timing:
• IV opioid: reassess at 30–60 minutes (peak effect)
• PO opioid: reassess at 60–90 minutes
• Non-opioid oral: reassess at 60 minutes
• IV non-opioid (ketorolac, acetaminophen IV): reassess at 30–60 minutes
• Non-pharmacological (ice, heat, positioning, distraction): reassess within 30 minutes

What to reassess:
• Pain rating — did it improve by at least 2 points? Is it at the patient's goal?
• Functional status — can the patient breathe deeply, move, sleep?
• Adverse effects — sedation, respiratory rate (for opioids), GI effects
• Need for additional intervention — if pain is inadequately controlled, notify provider

Documentation: Document the pain level before the intervention, the intervention given, and the reassessment findings. This creates a complete pain management record and demonstrates nursing responsiveness to patient suffering.

Non-Opioid Analgesics

Acetaminophen and NSAIDs — first-line agents with important clinical limits

Acetaminophen (Tylenol) — maximum dose and liver risk

The safest analgesic — when the dose limit is respected

Acetaminophen works centrally — it raises the pain threshold in the brain. It is effective for mild to moderate pain, fever, and as an adjunct to reduce opioid requirements post-operatively. It does not cause GI ulcers, does not affect platelet function, and does not impair kidney function — advantages over NSAIDs.

The maximum dose rule:
• Healthy adults: maximum 4,000mg (4g) per 24 hours
• Patients with liver disease, heavy alcohol use, or malnourishment: maximum 2,000mg (2g) per 24 hours
• Elderly patients: many sources recommend maximum 3,000mg per 24 hours

The hidden acetaminophen trap: Acetaminophen is in hundreds of combination products — Percocet (oxycodone/acetaminophen), Vicodin (hydrocodone/acetaminophen), Tylenol PM, Nyquil, Theraflu, many prescription pain preparations. A patient who takes extra-strength Tylenol + Percocet + Nyquil may unknowingly exceed 5,000mg of acetaminophen in 24 hours, causing acute liver failure.

Nursing action: When a patient on scheduled acetaminophen requests a PRN opioid-acetaminophen combination, calculate the total acetaminophen dose before giving. If it would exceed the limit, notify the provider — a straight opioid without acetaminophen may be safer.

💊 "Add up all the acetaminophen." A post-surgical patient is on: Percocet 5/325 q4h PRN (325mg acetaminophen each dose × 6 doses = 1,950mg), scheduled Tylenol 650mg q6h (2,600mg/day). Total: 4,550mg — over the 4,000mg limit. The nurse catches this before the next dose and calls the provider. The Percocet is changed to plain oxycodone.

NSAIDs — powerful analgesics with important contraindications

Ibuprofen, naproxen, ketorolac — effective but contraindicated in specific populations

NSAIDs (non-steroidal anti-inflammatory drugs) block prostaglandin synthesis — reducing pain, fever, and inflammation at the site. They are highly effective for inflammatory pain (arthritis, musculoskeletal injury, post-surgical pain), visceral pain, and dysmenorrhea.

Contraindications — the patients who cannot take NSAIDs:
• Renal impairment — NSAIDs reduce renal prostaglandins that maintain kidney blood flow. In patients whose kidneys already depend on prostaglandins (CKD, dehydration, heart failure, elderly), NSAIDs can cause acute kidney injury
• Active peptic ulcer or GI bleed — NSAIDs inhibit prostaglandins that protect the gastric lining
• Post-CABG surgery — increased cardiovascular event risk
• Third trimester of pregnancy — premature closure of the ductus arteriosus
• Aspirin allergy/intolerance — cross-reactivity with other NSAIDs common
• Bleeding disorders or on anticoagulants — NSAIDs inhibit platelet aggregation

Ketorolac (Toradol): The IV/IM NSAID — used for acute moderate to severe pain when opioids are to be avoided. Highly effective, but: maximum 5 days of use (longer use significantly increases GI and renal toxicity), and all standard NSAID contraindications apply.

💊 "Ketorolac maximum 5 days." This is one of the most common prescribing errors — ordering ketorolac for longer than 5 days. The nurse who catches a 10-day ketorolac order and calls the provider prevents a GI bleed or acute kidney injury. Duration limits exist for clinical safety reasons, not bureaucratic convenience.

Non-Pharmacological Pain Management

Nursing interventions that reduce pain without drugs

Non-Pharmacological Interventions

Powerful adjuncts that reduce opioid requirements and improve comfort

Non-pharmacological pain management is not a consolation prize when medications are unavailable — it is an evidence-based component of multimodal pain management. Research consistently shows these interventions reduce pain scores, decrease opioid consumption, and improve patient satisfaction.

Physical interventions:
• Cold therapy (ice, cold packs): reduces inflammation, numbs tissue, decreases local blood flow — most effective in acute injury (first 48 hours), musculoskeletal pain
• Heat therapy: increases blood flow, relaxes muscle spasm, decreases stiffness — most effective for chronic muscle pain, back pain, menstrual cramps (not for acute injury/inflammation)
• Positioning: elevating an injured limb reduces edema and pain; specific positions relieve pressure on surgical sites; side-lying with pillow between knees for back pain
• Splinting: immobilizing a painful extremity reduces movement-triggered pain

Cognitive-behavioral interventions:
• Distraction: TV, music, conversation, games — most effective for procedural pain and mild to moderate pain
• Guided imagery and relaxation: deep breathing, progressive muscle relaxation, mindfulness — reduces anxiety component of pain perception
• Patient education: explaining what pain to expect and why reduces anxiety and perceived pain intensity

The nursing opportunity: Non-pharmacological interventions are entirely within the nurse's scope to initiate without a physician order. A nurse who repositions a patient, applies ice to a swollen joint, and offers headphones with music before calling for a PRN opioid is practicing excellence.

💊 "Reposition before calling for the PRN." A patient reports hip pain at 3am. The nurse repositions them with pillow support, turns on soft music, and reassesses in 15 minutes. Pain decreased from 6 to 3. No opioid needed. This is not "avoiding treatment" — it is multimodal pain management that avoids unnecessary opioid exposure and respects the patient's comfort holistically.

🏥 Clinical Scenario — Comprehensive Pain Assessment and Management

Mr. Oduya, 54 years old, post-operative day 2 after right knee replacement. He rates his pain 8/10. He is on scheduled acetaminophen 650mg q6h, oxycodone 5mg PO PRN q4h, and ketorolac 30mg IM PRN q6h (ordered day 0 post-op).

PQRST

Full pain assessment: P — worse with movement, better with ice. Q — deep, aching, with some burning along the inner knee (neuropathic component possible). R — right knee only, no radiation. S — 8/10, not sleeping because of it. T — constant, worse since PT this afternoon. Burning quality noted — may benefit from gabapentin. Document and report pain quality to provider, not just the number.

Ketorolac

Medication review: Ketorolac ordered "PRN q6h." Check the date — today is post-op day 2. Ketorolac was ordered day 0. That is 48 hours — still within the 5-day limit. However, his creatinine today: 1.4 (baseline 0.9) — mild AKI developing. Ketorolac is NSAID — contraindicated with rising creatinine. Hold ketorolac and notify provider before next dose. Document finding.

APAP

Acetaminophen review: Scheduled 650mg q6h = 2,600mg/day. No acetaminophen-containing PRN opioids — oxycodone is plain (not combination). Total acetaminophen: 2,600mg — within safe limits. Continue as scheduled. ✓

Multi

Multimodal approach: Ice pack applied to right knee for 20 minutes. Repositioned with pillows for support. Oxycodone 5mg PO given (last dose was 5 hours ago — within interval). Music offered. 45-minute reassessment: pain 5/10, patient able to rest. Provider notified of neuropathic component and ketorolac concern. Gabapentin 100mg TID ordered. Ketorolac held pending creatinine trend.

📌 NCLEX Application

Pain management is tested across multiple NCLEX question categories:

Assessment priority: "A patient rates pain 8/10. Which action does the nurse take first?" → Perform a complete pain assessment (PQRST) before selecting an intervention — the number alone does not determine treatment. What type of pain, where, and when started guides the choice.

Acetaminophen limit: "A patient on scheduled acetaminophen 1,000mg q6h requests Percocet (oxycodone/acetaminophen 5/325mg) for breakthrough pain. Which action does the nurse take first?" → Calculate total acetaminophen: 4,000mg scheduled + additional doses from Percocet. If it exceeds 4,000mg/24 hours, contact the provider before giving.

NSAID contraindication: "A patient with a creatinine of 2.8 reports post-surgical pain. Which analgesic does the nurse question?" → Ketorolac (NSAID) — NSAIDs reduce renal prostaglandins and can cause acute kidney injury, especially in patients with pre-existing renal impairment.

Non-pharmacological: "A patient reports pain 4/10 and is not due for a PRN medication for another 2 hours. Which nursing action is most appropriate?" → Implement non-pharmacological interventions — positioning, ice, heat, distraction — before waiting or calling for an early dose.

⚠️ The Trap — Undertreating Pain Because of Fear of Opioid Side Effects

A patient post-operatively rates their pain 9/10. The nurse reviews the order — morphine 2mg IV PRN is available. The nurse hesitates: "What if it causes respiratory depression? I just checked and their respiratory rate was 16. Maybe I should wait and see if the pain gets better on its own."

What is actually happening: Undertreated severe pain has significant clinical consequences — it impairs deep breathing (increasing pneumonia risk), prevents therapeutic ambulation (increasing DVT risk), causes splinting that impairs respiratory mechanics, elevates stress hormones that impair healing, and causes avoidable patient suffering.

The clinical calculation: A patient with a RR of 16 and no sedation is not at immediate risk from 2mg of morphine. The risk of withholding adequate pain management is real and measurable. The risk of respiratory depression from 2mg morphine in a non-sedated, appropriately responsive patient with RR 16 is low — and manageable with monitoring and Narcan availability.

The correct response: Assess the patient — RR, sedation score, pain severity. If safe parameters are met, give the ordered medication. Reassess at 15–30 minutes. Document findings. Fear of opioid side effects should not lead to routine undertreatment of severe pain — it should lead to diligent post-administration monitoring.

The NCLEX principle: Pain is subjective. The patient's self-report is the most reliable indicator of pain intensity. A nurse who routinely delays or withholds pain medications based on personal judgment about whether the pain "looks" severe is violating the patient's right to adequate pain management.

✓ Quick Self-Test

Answer before checking:

1. What does PQRST stand for in pain assessment?
2. What is the maximum daily dose of acetaminophen for a healthy adult?
3. Why are NSAIDs contraindicated in patients with renal impairment?
4. When should the nurse reassess pain after giving an IV opioid?
5. A patient with burning, shooting leg pain after back surgery is asking for more oxycodone. The current dose is not helping much. What does the nurse report to the provider, and what drug class might be more appropriate?

Answers:
1. Provocation/Palliation · Quality · Region/Radiation · Severity · Timing.
2. 4,000mg (4g) per 24 hours for healthy adults. Reduced to 2,000mg in patients with liver disease, heavy alcohol use, or malnutrition. Watch for hidden acetaminophen in combination products (Percocet, Vicodin, Nyquil) that count toward the total daily limit.
3. NSAIDs inhibit prostaglandins that maintain renal blood flow. Patients with renal impairment often rely on these prostaglandins to maintain adequate kidney perfusion. Blocking them with NSAIDs can cause acute kidney injury or worsen existing CKD.
4. 30–60 minutes after IV opioid administration — this is the peak effect window. Assess pain level, sedation score, and respiratory rate. Document the reassessment findings and whether additional intervention is needed.
5. Report the pain quality — burning, shooting, neuropathic character — to the provider. Neuropathic pain responds poorly to opioids alone. Gabapentin or pregabalin (anticonvulsants with analgesic effect on nerve pain), duloxetine (SNRI), or tricyclic antidepressants are first-line for neuropathic pain. Adding one of these may provide better relief than increasing opioid dose.