Acute vs Chronic Pain — Core Distinction

Acute Pain

  • Duration: <3 months (commonly <6 weeks)
  • Biological function: warning signal, protective
  • Proportional to tissue injury
  • Resolves with healing
  • Sympathetic activation: tachycardia, diaphoresis

Chronic Pain

  • Duration: >3 months (IASP definition)
  • No longer protective — becomes a disease entity
  • Often disproportionate to tissue damage
  • Associated with neuroplastic changes
  • Sympathetic signs often absent; depression/anxiety dominate
ICD-11 Classification (2019) Chronic Primary Pain (no underlying cause) vs Chronic Secondary Pain (cancer, post-surgical, neuropathic, visceral, musculoskeletal, headache subtypes).

Pain Mechanisms — Three Key Types

Nociceptive Pain

  • Activation of nociceptors by tissue damage
  • Somatic (sharp, localized) or visceral (dull, referred)
  • Examples: OA, LBP (mechanical), post-surgical
  • Responds to NSAIDs, opioids

Neuropathic Pain

  • Lesion or disease of somatosensory nervous system
  • Burning, electric, shooting; allodynia; hyperalgesia
  • Examples: diabetic neuropathy, PHN, radiculopathy
  • Responds to anticonvulsants, antidepressants

Nociplastic Pain

  • Altered nociception without clear structural lesion
  • Central sensitisation is hallmark
  • Examples: fibromyalgia, IBS, chronic widespread pain
  • Poor opioid response; psychosocial Rx most effective

Central Sensitisation & Wind-Up Phenomenon

Central Sensitisation: Amplification of neural signalling in the CNS, resulting in pain hypersensitivity. After repeated stimulation, dorsal horn neurons become hyperexcitable. Key mediators: glutamate (NMDA receptors), substance P, BDNF.

Wind-Up

Repetitive C-fibre stimulation at >0.5 Hz causes progressive increase in dorsal horn neuron discharge — the "wind-up" effect. Clinically: pain worsens with repeated identical stimuli. NMDA-receptor antagonists (ketamine, memantine) can modulate this.

Clinical Manifestations of Sensitisation

Gate Control Theory (Melzack & Wall, 1965)

Pain transmission is modulated at spinal dorsal horn "gates." Large-diameter A-beta fibres (touch) inhibit small-diameter C-fibre pain signals. Descending inhibitory pathways from brain (endorphins, serotonin, noradrenaline) close the gate. Psychological factors (attention, emotion) open/close gate from above.

Clinical applications: TENS (activates A-beta fibres), distraction techniques, massage, CBT — all work through gate modulation.

Pain Memory, Catastrophising & Biopsychosocial Model

Pain Memory (Fear-Avoidance Model)

Chronic pain creates fear of movement (kinesiophobia), avoidance behaviour, deconditioning, and disability. This reinforces pain — a vicious cycle.

Pain Catastrophising

Exaggerated negative orientation toward pain. Three components (Sullivan): rumination ("I can't stop thinking about it"), magnification ("something terrible will happen"), helplessness ("nothing can help"). Strongly predicts disability and poor treatment outcomes. Assessed with Pain Catastrophising Scale (PCS).

Biopsychosocial Model (Engel)

Biological

  • Tissue damage
  • Neuroplasticity
  • Genetics (COMT gene)
  • Sleep disruption

Psychological

  • Catastrophising
  • Depression/anxiety
  • Self-efficacy
  • Pain beliefs

Social

  • Work/disability
  • Family support
  • Cultural factors
  • Litigation/compensation
GCC Prevalence — Chronic Pain LBP affects 25–40% of GCC working-age adults. Fibromyalgia prevalence ~2–5% (higher in Saudi Arabia; female:male 9:1). Sickle cell disease: high prevalence in Saudi Arabia (Eastern Province), Bahrain, Oman — chronic pain affects 30–50% of SCD patients.

Brief Pain Inventory (BPI)

Gold-standard multidimensional assessment. Two main domains:

Pain Severity (NRS 0–10)

  • Worst pain in 24 hours
  • Least pain in 24 hours
  • Average pain
  • Pain right now

Pain Interference (0–10 each)

  • General activity
  • Mood
  • Walking ability
  • Normal work (inside + outside home)
  • Relations with others
  • Sleep
  • Enjoyment of life

Scoring: Average interference score = sum of 7 interference items ÷ 7. Clinically significant: severity ≥4/10 or interference ≥5/10. Validated in Arabic.

DN4 Questionnaire — Neuropathic Pain Screening

Cut-off: Score ≥ 4/10 = Neuropathic pain likely (Sensitivity 83%, Specificity 90%)
DomainItems
Interview (4 items) 1. Burning
2. Painful cold (freezing)
3. Electric shocks
4. Tingling / pins-and-needles / numbness / itching
Examination (6 items) 5. Hypoaesthesia to touch
6. Hypoaesthesia to pinprick
7. Allodynia (brushing)
(Items 8–10 are brushing, cold, pressing for allodynia subtypes)

Each "Yes" = 1 point. Administer before initiating neuropathic pain medications. Useful in diabetic neuropathy screening in GCC (high DM prevalence).

Pain Catastrophising Scale (PCS)

13-item self-report; each item 0–4. Total: 0–52. Subscales: Rumination (4 items), Magnification (3 items), Helplessness (6 items).

Functional Impact Assessment

Sleep

  • Pittsburgh Sleep Quality Index (PSQI)
  • Hours slept, sleep initiation latency
  • Pain as cause of waking
  • Assess for sleep apnoea (opioid risk)

Activities of Daily Living

  • DASH (upper limb), WOMAC (knee/hip OA)
  • Barthel Index for severe disability
  • Ability to dress, cook, drive, walk distances

Work & Occupation

  • Days absent in last 3 months
  • Modified duty/light work needed
  • Risk of job loss (GCC labour law implications)

Relationships & Mood

  • PHQ-9 depression screening
  • GAD-7 anxiety screening
  • Caregiver burden assessment
  • Social isolation indicators

Pain Diary

Prospective recording over 1–4 weeks. Captures: pain NRS (morning/evening/worst), activity level, medication taken, sleep quality, mood (1–10). Identifies patterns: nocturnal worsening (inflammatory), morning stiffness (RA/AS), activity-related (mechanical). Used to assess treatment response and detect opioid overuse patterns.

Opioid Risk Tool (ORT) — Pre-Prescribing Screen

5-item screener to predict aberrant opioid-related behaviour before initiating long-term opioid therapy:

ItemFemale ScoreMale Score
Family history of substance abuse (alcohol)13
Family history of substance abuse (illicit drugs)23
Personal history of substance abuse35
Age 16–4511
History of preadolescent sexual abuse30
Psychological disease (ADD, OCD, bipolar, schizophrenia, depression)22

Low risk: 0–3 Moderate: 4–7 High risk: ≥8

GCC Note: Alcohol and illicit drug history may be under-reported due to cultural/legal stigma. Cross-check with pharmacy records and urine drug screening where permitted.

WHO Analgesic Ladder — Adapted for Chronic Pain

Key shift from acute pain: The WHO ladder was designed for cancer pain. For chronic non-cancer pain, start with non-opioid multimodal therapy; opioids reserved for failure of other approaches.
StepAgentsChronic Pain Notes
Step 1Paracetamol, NSAIDs, topicalsAlways try first; paracetamol max 3g/day in elderly/liver disease
Step 2Weak opioids: tramadol, codeineTramadol: serotonin syndrome risk with SNRIs; codeine: CYP2D6 variability common in Arabs
Step 3Strong opioids: morphine, oxycodone, fentanylRequire specialist prescribing in GCC; strict controlled drug protocols
AdjuvantsAntidepressants, anticonvulsants, topicals, ketamineUsed at any step — first-line for neuropathic pain

NSAIDs — GCC Cardiovascular Caution

High rates of DM, hypertension, metabolic syndrome in GCC increase NSAID cardiovascular risk significantly.

AgentCOX SelectivityGCC Consideration
IbuprofenNon-selectiveGI risk; avoid with antiplatelet agents (common post-ACS)
NaproxenNon-selectiveBetter cardiovascular profile than other NSAIDs; preferred if CV risk
DiclofenacMild COX-2 preferenceHepatotoxicity risk; topical form preferred for localised pain
CelecoxibCOX-2 selectiveContraindicated in ischaemic heart disease; GI-sparing but CV risk elevated; use with PPI
EtoricoxibHighly COX-2 selectiveWidely prescribed in GCC; AVOID if BP uncontrolled or CVD history
Avoid long-term NSAIDs if: eGFR <30, active peptic ulcer, heart failure, or concurrent anticoagulation without specialist review.

Antidepressants for Chronic Pain

Amitriptyline (TCA)

  • Pain dose: 10–75 mg nocte (lower than antidepressant dose of 75–150 mg)
  • Indications: PHN, neuropathic pain, fibromyalgia, chronic headache
  • Onset for pain: 2–4 weeks
  • Side effects: Sedation (use at night), dry mouth, constipation, urinary retention, QTc prolongation
  • Caution: elderly, BPH, glaucoma, cardiac disease

Duloxetine (SNRI)

  • Pain dose: 30–60 mg daily (same as depression dose)
  • Indications: Diabetic neuropathy (FDA approved), fibromyalgia, LBP
  • Onset for pain: 4–8 weeks
  • Side effects: Nausea (take with food), headache, sweating, insomnia
  • Caution: Hepatic impairment; serotonin syndrome with tramadol

Venlafaxine 75–225 mg: alternative SNRI; monitor blood pressure. SSRIs (e.g., fluoxetine): minimal evidence for pain — not recommended as analgesics.

Anticonvulsants — GCC Controlled Drug Status

Gabapentin

  • Starting dose: 100–300 mg TDS; titrate to 900–3600 mg/day
  • Indications: PHN, neuropathic pain, SCI pain
  • Side effects: Sedation, dizziness, peripheral oedema, weight gain
  • Reduce dose in renal impairment (renally cleared)

Pregabalin

  • Starting dose: 25–75 mg BD; titrate to 150–600 mg/day
  • Indications: Neuropathic pain, fibromyalgia (FDA-approved), anxiety
  • Side effects: Similar to gabapentin + euphoria (addiction potential)
  • More predictable absorption than gabapentin
GCC Controlled Drug Alert: Pregabalin is classified as a controlled/psychotropic substance in UAE, Saudi Arabia, and Kuwait due to misuse potential. Requires specialist prescribing in most GCC countries. Monitor for signs of gabapentinoid misuse: dose escalation requests, lost prescriptions, concurrent benzodiazepine use.

Opioids for Chronic Non-Cancer Pain (CNCP)

Principle: Opioids in CNCP are a therapeutic trial, not a long-term commitment. Reassess every 3 months. Document: pain reduction ≥30%, functional improvement, no red flags. Taper if goals unmet.

Key Concepts

Naloxone Co-Prescription

Prescribe intranasal/IM naloxone (0.4 mg) to all patients on long-term opioids ≥50 MME/day, OSA, concurrent benzodiazepines, or ORT high-risk. Educate patient AND family on use.

Equianalgesic Table (Oral)

OpioidEquianalgesic Oral DoseNotes
Morphine30 mgReference standard (oral)
Oxycodone20 mg1.5× more potent than morphine PO
Codeine200 mgProdrug; ~10% converts to morphine
Tramadol300 mgWeak mu-agonist + SNRI mechanism
Fentanyl patch12 mcg/hr ≈ 45 mg morphine/dayTransdermal; steady state at 12–24 hrs
Hydromorphone7.5 mg4× more potent than morphine PO
Buprenorphine patch5 mcg/hr ≈ 10 mg morphine/dayCeiling effect on respiratory depression

Topical Analgesics

Lidocaine 5% Patch

  • Apply to painful area up to 12 hrs/day
  • Indications: PHN, localised neuropathic pain
  • Minimal systemic absorption — safe in elderly, renal/hepatic impairment
  • Available in some GCC pharmacies; check local formulary

Capsaicin

  • 0.025–0.075% cream: TDS–QDS; initial burning reduces with use; depletes substance P
  • 8% patch (Qutenza): Single 60-minute application by specialist; lasts 3 months; PHN and HIV neuropathy
  • Advise patients: burning normal first 1–2 weeks; wash hands after applying

Nerve Blocks — Types & Nursing Role

ProcedureIndicationPatient PrepPost-Procedure Monitoring
Epidural Steroid InjectionRadiculopathy, spinal stenosis, disc herniationNPO 4–6 hrs if sedation; INR check; consent; stop anticoagulants per protocol1–2 hrs: BP, neuro check, leg strength/sensation, urinary retention screen
Facet Joint Injection / MBBFacet-mediated LBP (SI joint, cervical)Same as above; corticosteroid allergy screen1 hr monitoring; warn temporary leg weakness possible; no driving same day
Nerve Root BlockSpecific dermatomal radiculopathyImaging review; allergy history; IV accessWatch for inadvertent intrathecal injection (total spinal); neuro vitals q15 min × 2 hrs
Sympathetic Nerve Block (Stellate/Coeliac)CRPS, visceral pain, vascular painIV access; resuscitation equipment at bedsideStellate: Horner's syndrome expected (ptosis, miosis, anhidrosis); BP monitoring; hoarseness may occur
Trigger Point InjectionMyofascial pain, fibromyalgiaIdentify trigger points; clean technique; no special prep30 min post; document response; avoid over-reliance pattern
Emergency equipment at bedside for all blocks: Resuscitation trolley, intralipid 20% (for local anaesthetic systemic toxicity — LAST), oxygen, suction, IV access.

Spinal Cord Stimulation (SCS)

Implanted device delivering electrical impulses to dorsal columns, inhibiting pain transmission (gate control mechanism). Reserved for treatment-resistant chronic pain after conservative and interventional failure.

Indications

Trial Phase (7–10 days)

External trial with percutaneous leads before permanent implant. Success = ≥50% pain reduction. Nursing role: wound care, lead security, battery management, document pain diary during trial.

Post-Implant Education

TENS (Transcutaneous Electrical Nerve Stimulation)

Patient Education Points

Physiotherapy Modalities

Heat Therapy

  • Increases blood flow, reduces muscle spasm
  • Use for chronic musculoskeletal pain, stiffness
  • Superficial: hot packs, heat pads (max 20 min; protect skin)
  • Avoid over anaesthetic areas or poor circulation

Cold Therapy

  • Reduces inflammation, nerve conduction
  • Use for acute flares of chronic pain
  • Ice pack (wrapped in cloth) 10–15 min; avoid frostbite

Graded Exercise Therapy (GET)

  • Gradual, systematic increase in physical activity
  • Address fear-avoidance: "hurt ≠ harm"
  • Start at baseline capacity; increase 10–20%/week
  • Evidence: fibromyalgia, CLBP, CFS
  • Aerobic (walking, swimming) + resistance training

Aquatherapy (Hydrotherapy)

  • Warm water (34–36°C) reduces joint loading
  • Ideal for fibromyalgia, OA, spinal pain
  • Combined buoyancy + heat + resistance

Psychological Approaches

CBT for Pain (Pain-CBT)

  • Identifies and challenges unhelpful pain beliefs
  • Behavioural activation — reduces avoidance
  • Relaxation techniques, sleep hygiene
  • Evidence: fibromyalgia, CLBP, headache, CRPS
  • 8–12 sessions; individual or group format

Acceptance & Commitment Therapy (ACT)

  • Accept pain rather than fight it
  • Identify personal values; commit to valued activities despite pain
  • Reduces experiential avoidance
  • Comparable efficacy to CBT; growing evidence base

Mindfulness-Based Stress Reduction (MBSR)

  • 8-week programme (Kabat-Zinn)
  • Meditation, body scan, yoga
  • Reduces pain catastrophising and disability
  • Improved in Arabic-speaking populations when culturally adapted

Biofeedback

  • EMG biofeedback: reduces muscle tension
  • Temperature/EEG biofeedback: headache, CRPS
  • Patient learns physiological self-regulation

Multidisciplinary Pain Clinic (MPC) Pathway

Best outcomes for complex chronic pain require coordinated MDT. Referral criteria: pain >6 months, functional impairment, failed ≥2 treatments, significant psychological comorbidity, high-dose opioids, or complex conditions (CRPS, SCS candidacy).

MDT team: Pain specialist physician, nurse specialist, physiotherapist, psychologist/psychotherapist, pharmacist, occupational therapist, social worker.

GCC Reality: Dedicated pain clinics exist in major tertiary hospitals (e.g., KFSH&RC Riyadh, Cleveland Clinic Abu Dhabi, Hamad Medical Qatar, SKMC). Wait times can be lengthy. Nurses play a crucial role in triaging, pre-clinic assessment, and ongoing monitoring between specialist visits.

Chronic Low Back Pain (CLBP)

RED FLAGS — CAUDA EQUINA SYNDROME (EMERGENCY) Mnemonic: CAUDA EQUINA
Bilateral sciatica | Saddle anaesthesia (perineum, inner thighs) | Bowel dysfunction (retention or incontinence) | Bladder dysfunction (retention → overflow incontinence) | Sexual dysfunction | Progressive lower limb weakness

Action: Immediate neurosurgical referral. MRI within hours. Do NOT delay.

Other Red Flags for LBP

Management (Conservative vs Surgical)

Conservative (First-line, ≥12 weeks)

  • Graded exercise, physiotherapy
  • NSAIDs (short-term), paracetamol
  • Duloxetine for neuropathic component
  • CBT, patient education (stay active)
  • Avoid bed rest >48 hrs
  • Epidural steroids for radiculopathy

Surgical (Selected cases)

  • Microdiscectomy: disc herniation + neurological deficit
  • Decompression: spinal stenosis with claudication
  • Spinal fusion: instability, spondylolisthesis
  • Outcome: better for leg pain than back pain
  • Pre-op: stop NSAIDs; physio prehabilitation

Fibromyalgia

ACR 2010/2011 Diagnostic Criteria

Note: Tender point count (old 1990 criteria) no longer required. Fibromyalgia can coexist with other conditions.

Management

GCC Note: Fibromyalgia often misdiagnosed or dismissed in GCC. Patients may undergo multiple investigations and receive inappropriate opioids. Cultural expectation of "finding a cause" requires careful explanation of the central sensitisation model.

Post-Herpetic Neuralgia (PHN)

Pain persisting >3 months after herpes zoster (shingles) rash. Most common in elderly and immunocompromised. Burning, constant ± allodynia (light touch triggers severe pain).

Prevention — Antiviral Timing

Starting antivirals (aciclovir/valaciclovir/famciclovir) within 72 hours of rash onset reduces duration and severity of PHN. Nurse assessment: check rash onset date and start antivirals promptly. Zoster vaccine (Shingrix — recombinant) recommended for adults ≥50 years; available in GCC private sector.

Treatment of Established PHN

AgentDoseNotes
Gabapentin300–3600 mg/day in divided dosesFirst-line; titrate slowly; reduce in renal failure
Pregabalin75–300 mg BDFirst-line; controlled drug in GCC
Amitriptyline10–75 mg nocteEspecially useful for sleep disruption component
Lidocaine 5% patchUp to 3 patches × 12 hrsAllodynia; minimal systemic effect; safe in elderly
Capsaicin 8% patch1 application q3 monthsSpecialist-applied; effective for localised PHN

Diabetic Peripheral Neuropathy (DPN)

Affects ~50% of people with diabetes. Distal symmetric polyneuropathy most common: burning feet, numbness, tingling. GCC has one of world's highest DM prevalences (prevalence >20% in Saudi Arabia, UAE).

Management Priorities

Sickle Cell Chronic Pain

Chronic pain in SCD is distinct from acute vaso-occlusive crisis (VOC). Affects 30–50% of SCD patients, often under-recognised and undertreated.

Mechanisms

Management

GCC Note: High SCD prevalence in Eastern Saudi Arabia, Bahrain, and Oman. Cultural tendency to visit ED for every pain episode — work with patients on home management plans and clear escalation criteria.

Opioid Prescribing Regulations in the GCC

Critical for GCC Nurses: All GCC countries enforce strict controlled substance laws comparable to or stricter than the US DEA Schedule II framework. Nurses must understand their legal obligations.
CountryRegulatory BodyKey Requirements
Saudi ArabiaSFDA (Saudi Food & Drug Authority)Narcotic prescriptions require special narcotic prescription pads; limited supply per prescription; hospital formulary restrictions
UAEMOH + DHA + HAAD (emirate-specific)Electronic prescribing system; specific controlled drug cabinets; disposal documentation
QatarMOH QatarStrict import/export controls; opioid prescription linked to national health ID
KuwaitMOH KuwaitControlled drug register; 7-day supply maximum for most opioids
BahrainNHRANarcotic prescription in triplicate; pharmacy and authority copies retained
OmanMOH OmanSimilar to Saudi model; specialist-only prescribing for strong opioids

Nurse Role in Opioid Monitoring

Pain Clinic Access in GCC

Access to specialised pain clinics varies significantly across the region:

Well-Resourced (Tertiary Centres)

  • KFSH&RC (Riyadh, Jeddah, Dhahran)
  • Cleveland Clinic Abu Dhabi
  • Hamad Medical Corporation (Qatar)
  • SKMC (Abu Dhabi)
  • King Saud Medical City

Gaps in Access

  • Rural areas in Saudi Arabia and Oman
  • Private sector patients without insurance
  • Low-income expat workers
  • Small GCC states with limited specialists
  • Telemedicine pain consultations expanding post-COVID

Nurse role: Triage appropriately; manage patients in primary care with telephone/virtual MDT support; recognise when escalation is urgent.

Cultural Factors Affecting Chronic Pain Management

Cultural Stoicism

  • Many GCC patients (particularly men) minimise pain expression in clinical settings
  • Pain expression may be seen as weakness or lack of faith ("sabr" — patience/endurance)
  • May lead to under-reporting and delayed treatment
  • Nursing approach: normalise pain reporting; use validated Arabic pain scales; private assessment environment

Over-Reliance on Injections

  • Cultural perception that injections are more powerful than tablets
  • Patients may request injections when oral therapy is appropriate
  • Risk: unnecessary procedures, polypharmacy avoidance of safer oral options
  • Approach: educate on mechanism; explain that tablets reach same receptors; validate concerns

Family Involvement

In GCC culture, medical decisions often involve the extended family. This can be beneficial (social support) or challenging (family pressure to "cure" or over-medicate). Include key family members in education with patient consent.

Ramadan and Chronic Pain Medication Adherence

Ramadan fasting (approximately 12–18 hrs/day) presents specific challenges for chronic pain medication schedules:

Clinical Challenges

  • Missed daytime doses → pain flares
  • Abrupt opioid dose gaps → withdrawal features
  • Oral NSAIDs: GI risk with empty stomach before Iftar
  • Dehydration → renal function changes affecting drug clearance
  • Sleep schedule reversal → pain worse due to fatigue

Nursing Strategies

  • Pre-Ramadan medication review (schedule in Sha'ban)
  • Switch to once-daily formulations (SR/XR preparations)
  • Transdermal patches: unaffected by fasting
  • Time oral NSAIDs with Iftar (breaking fast meal)
  • Ensure adequate hydration at Iftar and Suhoor
  • Educate: Islam permits medication for genuine medical need; consult local scholar if uncertain

Returning to Work with Chronic Pain

Prolonged work absence worsens chronic pain outcomes. Early return-to-work (RTW) is a treatment goal, not just an administrative matter.

GCC Labour Law Considerations

Expat Workers and Work-Related Chronic Pain

GCC has a large migrant workforce (40–90% of workforce in some Gulf states). Work-related chronic pain presents unique challenges:

Vulnerable populations: Construction workers (LBP, repetitive strain), domestic workers (limited healthcare access), drivers (LBP, neck pain), industrial workers (vibration-related conditions).

Key Issues

Equianalgesic Opioid Converter

Convert between opioids using oral morphine equivalents. Always reduce calculated dose by 25–50% for opioid rotation (incomplete cross-tolerance).

Equianalgesic dose (before rotation reduction):
Safety Warning: This calculator is for educational reference only. All opioid prescribing decisions must be made by a qualified prescriber with full clinical context. Equianalgesic conversions are approximations; individual patient response varies significantly.

DN4 Neuropathic Pain Screener

Answer Yes or No for each item. Score ≥ 4 suggests neuropathic pain component.

Interview — Patient Describes Pain As:

1. Burning sensation
2. Painful cold / freezing sensation
3. Electric shock sensations

Interview — Associated with:

4. Tingling
5. Pins and needles
6. Numbness
7. Itching

Examination — Is Pain Increased or Caused By:

8. Hypoaesthesia to touch (reduced sensation)
9. Hypoaesthesia to pinprick
10. Allodynia — pain caused by gentle brushing
DN4 Score:

Practice MCQs — Chronic Pain Management

1. A patient has pain persisting for 5 months following knee surgery with no new structural pathology. Which pain classification is most appropriate?
2. A DN4 score of 5/10 is obtained for a patient with diabetic foot pain. What does this indicate?
3. Which mechanism best explains why TENS can reduce chronic pain?
4. A patient on long-term oral morphine 30 mg TDS needs rotation to oxycodone. What is the approximate equianalgesic oral oxycodone daily dose BEFORE applying rotation reduction?
5. A patient with chronic LBP presents with saddle anaesthesia and new urinary retention. What is the most appropriate immediate nursing action?
6. When amitriptyline is prescribed for neuropathic pain, how does the analgesic dose compare to the antidepressant dose?
7. A fibromyalgia patient scores 38/52 on the Pain Catastrophising Scale (PCS). What is the priority next step?
8. In a GCC patient taking pregabalin for chronic neuropathic pain during Ramadan, which is the BEST prescribing strategy?
9. An antiviral is most effective at preventing post-herpetic neuralgia (PHN) if started within what time frame of herpes zoster rash onset?
10. Central sensitisation as the dominant mechanism is most characteristic of which pain type?