Neck Pain and Whiplash
Clinical Snapshot
Neck pain is pain, tension, or stiffness localized to the cervical spine, with or without radiation into the shoulder, arm, or head, and is one of the most common musculoskeletal complaints seen in primary care and pharmacy practice. Whiplash is a specific mechanism of injury -- a rapid hyperextension-hyperflexion (flexion-extension) transfer of energy to the neck, classically from a rear-end motor vehicle collision -- that can injure bone or soft tissue and produce a whiplash-associated disorder (WAD); most neck pain, whether from a whiplash mechanism or an insidious mechanical cause, is nonspecific and self-limited, resolving over days to a few weeks.[1] Management turns on 3 questions asked at every visit: is this ordinary mechanical (nonspecific) neck pain, does it show the specific neurologic signature of cervical radiculopathy, or does it carry a red flag pointing to cord compression, fracture, vascular injury, infection, or malignancy -- this classification drives every downstream decision about imaging, immobilization, and drug therapy. A genuinely important shift in the evidence over the past decade has moved practice away from rest and cervical collar immobilization and toward early, active mobilization as the default for the large majority of patients, with pharmacotherapy positioned as an adjunct to that activity-based recovery rather than as the primary treatment.
Recognize the Condition
Mechanical (nonspecific) neck pain
Axial neck pain that worsens with movement or prolonged static posture (e.g., desk or screen work) and improves with rest or a position change, without radiation below the shoulder and without a demonstrable neurologic deficit. This is the presentation in the large majority of patients and does not require imaging or a specific structural diagnosis before starting treatment.
Cervical radiculopathy
Pain referred from the neck into the arm, accompanied by a dermatomal sensory change, a myotomal motor deficit, or a diminished reflex corresponding to a specific cervical nerve root -- most often from a herniated disc or degenerative foraminal narrowing compressing the root. A positive Spurling test (neck extension, lateral flexion, and axial compression toward the symptomatic side reproducing the arm pain) and a positive cervical distraction test (manual traction relieving the arm pain) both support the diagnosis. This distinction matters because radiculopathy points toward a specific anatomic cause and dermatomal exam pattern (see Assessment and Diagnosis) and changes the immobilization and referral decisions described below.
Whiplash presentation
Whiplash follows a specific injury mechanism (most often a rear-end motor vehicle collision) and, beyond neck pain, can produce a broader symptom complex under the whiplash-associated disorder (WAD) umbrella: headache, shoulder or interscapular pain, jaw pain, dizziness, visual disturbance, and cognitive complaints such as poor concentration or memory. Symptom onset is sometimes delayed by several hours after the collision rather than immediate.
The three neck pain presentations
Every patient is sorted into 1 of these 3 tracks at the first visit -- it determines the urgency and focus of everything that follows.
Mechanical (nonspecific) neck pain
No red flag and no radicular signs. The default presentation; managed with early mobilization, education, and simple analgesia.
Cervical radiculopathy
A specific dermatomal, myotomal, or reflex pattern with a positive Spurling or distraction test. Managed with the same analgesic approach plus a narrower, time-limited role for cervical collar use and specific referral triggers.
Red flag / suspected serious pathology
Cervical myelopathy, suspected fracture or instability, suspected vertebral artery dissection, or signs of infection or malignancy. Requires urgent work-up before any routine management -- see Red Flags and Refer.
Whiplash-Associated Disorders (WAD) grading -- Quebec Task Force classification
Grade every whiplash presentation at the first visit; grade drives the immobilization, referral, and monitoring decisions throughout this chapter.[2]
WAD-I
Neck pain, stiffness, or tenderness only -- no physical signs or limitation on exam. Manage as ordinary mechanical neck pain.
WAD-II
Neck pain and tenderness plus a reduced cervical range of motion, without a neurologic finding. The most common whiplash presentation.
WAD-III
Neck pain plus neurologic signs -- a sensory, motor, or reflex change -- without fracture or instability. Corresponds to whiplash-associated cervical radiculopathy and is the 1 situation where a brief period of collar use is a reasonable exception to the early-mobilization rule (see Choose Initial Treatment).
WAD-IV
Fracture or dislocation. A surgical emergency -- refer urgently; this chapter's nonsurgical approach does not apply.
The Bone and Joint Decade Task Force classification is a companion staging system that applies to any neck pain, not only whiplash, and roughly parallels the WAD grades above.[3]
| Grade | Description |
|---|---|
| Grade I | Neck pain or associated disorder without indication of major structural pathology, with minor or no interference with activities of daily living |
| Grade II | No indication of major structural pathology, but major interference with activities of daily living |
| Grade III | No indication of major structural pathology, but with neurologic signs -- abnormal reflexes, weakness, or sensory deficits |
| Grade IV | Signs or symptoms of major structural pathology -- fracture, vertebral dislocation, spinal cord injury, infection, neoplasm, or systemic inflammatory disease |
Risk Factors
Risk factors for developing neck pain
- Poor posture or prolonged screen-based or desk work with limited neck movement.
- Heavy manual labour or repetitive, awkward neck loading.
- Whiplash-specific mechanism: a rear-end motor vehicle collision, being struck while stationary or unaware, or an improperly positioned head restraint.
- A prior episode of neck pain -- the strongest predictor of a future episode.
- Pre-existing psychological distress, anxiety, or depression.
- Smoking.
- Reduced neck and scapulothoracic muscle endurance and poor general physical conditioning.
Risk factors for poor outcome or chronicity ("yellow flags") -- screen for these explicitly by 4 weeks if symptoms or work absence persist
- Self-reported unexplained high-intensity pain and disability.
- Catastrophizing, or a belief that pain and activity are inherently damaging.
- Depression, anxiety, or signs of post-traumatic stress -- the Patient Health Questionnaire for Depression and Anxiety (PHQ-4) is a reasonable brief screening tool.
- Passive coping strategies -- an expectation of passive treatment rather than a belief that active participation will help; the Pain Self-Efficacy Questionnaire (PSEQ) is a reasonable tool to identify this.
- Avoidance of movement.
- A history of previous musculoskeletal pain.
- Compensation or litigation in progress, particularly with high compensation levels or an adversarial relationship with the employer or insurer.
- Early, high-intensity health-care utilization immediately after the injury.[4]
Red Flags & Refer
Screen for these at every visit, and again at any reassessment -- most patients with neck pain, including most whiplash, do not have one of these, but missing one has far greater consequence than a short delay in routine mechanical-pain treatment.
- Signs of cervical myelopathy or spinal cord compression (a true surgical emergency -- same-day neurosurgical or spine assessment and emergency MRI): gait disturbance or unsteadiness, bilateral arm or leg symptoms, new bowel or bladder dysfunction, hyperreflexia, a positive Hoffman sign or an upgoing plantar response, or progressive limb weakness.
- Suspected cervical fracture or spinal instability after trauma: any Canadian C-Spine Rule high-risk factor (age 65 or older, a dangerous mechanism, or extremity paresthesias) -- imaging is required before any attempt at mobilization or active range-of-motion testing (see Assessment and Diagnosis).
- Progressive or new focal neurologic deficit of any cause -- needs urgent, not routine, neurologic and imaging assessment.
- Suspected vertebral artery dissection (a true emergency -- immediate emergency assessment): sudden, severe, unfamiliar neck pain or headache accompanied by a neurologic symptom such as dizziness, vertigo, double vision, slurred speech, unsteady gait, or facial or limb sensory or motor change, particularly after neck trauma or cervical manipulation.
- Fever, chills, or another systemic symptom suggesting infection (epidural abscess, discitis, or meningism) or malignancy (unexplained weight loss, significant night pain, severe fatigue, or a personal history of cancer) -- immunosuppression or intravenous drug use raises infection risk specifically.
- Features suggesting an inflammatory cause -- rheumatoid arthritis, polymyalgia rheumatica, or giant cell arteritis -- warrant rheumatology referral.
- WAD-IV or Bone and Joint Decade Grade IV -- confirmed fracture, dislocation, or another major structural pathology: urgent surgical referral; this chapter's nonsurgical approach does not apply.
Assessment & Diagnosis
History
The Clinically Organized Relevant Exam (CORE) neck tool is a useful structured framework for history-taking and triage in neck pain, guiding the clinician through red-flag screening, pain pattern characterization, and referral decisions. At the first visit: explicitly screen for every red flag above; characterize whether pain is axial only or radiates into the arm below the shoulder; establish the mechanism (insidious versus a specific trauma or whiplash mechanism) and, for a trauma mechanism, apply the Canadian C-Spine Rule below before any mobilization; grade WAD or Bone and Joint Decade severity if the presentation is acute (1-7 days) or trauma-related; and screen explicitly for yellow flags (see Risk Factors) if symptoms or work absence persist past 4 weeks. Review prior episodes, prior treatment response, and current medication use.
Physical examination
- Observe gait, including heel walking and toe walking, and watch for a Trendelenburg gait pattern -- all 3 are screens for a lumbosacral or more diffuse neurologic process that would change the working diagnosis.
- Document cervical range of motion (flexion, extension, rotation, and lateral flexion) as a baseline, along with cervical and shoulder posture.
- Screen cervical and supraclavicular lymph nodes.
- Active shoulder range of motion; perform a full shoulder exam if a finding is abnormal, since shoulder pathology can mimic or coexist with neck pain.
- Sitting: biceps (C5-C6) and triceps (C7) reflexes; myotomal strength testing -- trapezius shrug (C4), deltoid/shoulder abduction (C5), biceps/elbow flexion (C6), triceps/elbow extension (C7), and 3rd-finger flexion (C8); dermatomal light-touch sensation over the trapezius (C4), lateral shoulder (C5), thumb and lateral forearm (C6), middle finger (C7), and small finger and medial forearm (C8).
- Radicular testing: Spurling test and cervical distraction test (see Recognize the Condition).
- Upper motor neuron screen for cervical myelopathy: plantar response and Hoffman test.
| Nerve root | Motor | Sensory | Reflex |
|---|---|---|---|
| C4 | Trapezius (shoulder shrug) | Lower neck, upper shoulder (trapezius distribution) | No reliable primary reflex |
| C5 | Deltoid (shoulder abduction) | Lateral shoulder and upper arm | Biceps |
| C6 | Biceps (elbow flexion), wrist extension | Thumb and lateral forearm | Biceps / brachioradialis |
| C7 | Triceps (elbow extension) | Middle finger | Triceps |
| C8 | Finger flexion (3rd-5th digits) | Small finger and medial forearm | No reliable primary reflex |
Diagnostic imaging
Imaging is not recommended for acute or recurrent neck pain when history and physical examination show no evidence of a structural cause -- plain radiography specifically is not reliable enough to diagnose a structural cause of neck pain and should not be used as a screening test.[1]
For a trauma mechanism, apply the Canadian C-Spine Rule in an alert, stable patient (Glasgow Coma Scale 15) before deciding whether imaging or active range-of-motion testing is safe.[5]
| Step | Criteria |
|---|---|
| 1. High-risk factors -- any 1 mandates radiography | Age 65 years or older; a dangerous mechanism (a fall from an elevation of 3 feet/5 stairs or more, an axial load to the head, a motor vehicle collision at high speed [over 100 km/h], rollover, or ejection, a collision involving a motorized recreational vehicle, or a bicycle collision); or paresthesias in the extremities |
| 2. Low-risk factors -- at least 1 must be present to safely proceed to step 3 | A simple rear-end motor vehicle collision (excluding being pushed into oncoming traffic, being hit by a bus or large truck, a rollover, or being hit by a high-speed vehicle); sitting position in the emergency department; ambulatory at any time since the injury; delayed onset of neck pain; or no midline cervical spine tenderness |
| 3. Active range of motion | Able to actively rotate the neck 45 degrees to the left and right? If yes, radiography is not required. If no, or if no low-risk factor from step 2 is present, radiography is required. |
Beyond the trauma setting, reserve plain radiography for neck pain persisting more than a few weeks, and reserve MRI or CT for suspected nerve root or spinal cord involvement, a red flag, or neck pain that remains persistent or progressive after 4-6 weeks of guideline-concordant treatment.[1]
Treatment Targets
- Acute, 1-7 days: reduce distress, and identify a patient who needs urgent surgical intervention (WAD-IV/Bone and Joint Decade Grade IV, cervical myelopathy, or another red flag).
- Acute, 1-4 weeks: promote active therapy to restore function; return to normal activity and work as soon as tolerated.
- Subacute, 4-12 weeks: interrupt progression to chronicity; promote active therapy while encouraging return to work.
- Chronic, over 12 weeks (or 6 months or more): multimodal management of chronic pain and disability, emphasizing restored function and independence rather than complete pain resolution.
- At every stage: avoid over-treatment -- unnecessary imaging, prolonged immobilization, and unwarranted opioid exposure -- since most patients recover with active, noninvasive management.
Choose Initial Treatment
Every patient, first decision
1st line, WAD-I to WAD-III / mechanical neck pain Provide symptomatic relief, reassure the patient about the generally favourable natural history, and counsel to resume normal activity as soon as tolerated.[2]
Avoid prolonged cervical collar immobilization, bed rest, or other passive therapy for WAD-I to WAD-III or mechanical neck pain -- a genuine shift from older practice: current evidence shows immobilization does not speed recovery and is associated with delayed recovery and higher health-care utilization, so early, active mobilization is now the default rather than rest.[1]
WAD-IV / Bone and Joint Decade Grade IV -- fracture or dislocation Refer urgently for surgical management; this chapter's nonsurgical approach does not apply.
Cervical radiculopathy
Special situation -- acute cervical radiculopathy only (WAD-III / Bone and Joint Decade Grade III) A brief course of cervical collar immobilization, 3-6 weeks, is the 1 reasonable exception to the avoid-immobilization rule above, though evidence of benefit over physiotherapy or a wait-and-see approach is limited.
Treat pain with the same acetaminophen/NSAID-first approach used for mechanical neck pain (below); if a neuropathic pain quality is present -- burning, electric, or shooting pain following a dermatomal distribution -- a trial of a neuropathic-pain-specific agent may be added, dosed and titrated per the Neuropathic Pain chapter rather than repeated here.
Refer for specialist assessment of injection therapy or surgical evaluation if radicular symptoms are progressive, accompanied by a red flag, or not improving after 6-12 weeks of conservative management.
Analgesic selection -- mechanical neck pain and whiplash
1st line A scheduled oral NSAID (e.g., naproxen or ibuprofen) for the shortest effective period -- short-term NSAID use gives modest short-term relief in acute neck pain; select by the patient's GI and cardiovascular risk rather than by habit, and use the oral route only, never parenteral.[1]
Alternative, when an NSAID is contraindicated, not tolerated, or ineffective Acetaminophen -- current evidence does not show a clear efficacy benefit over placebo for spinal pain specifically, the same evidence gap already established for low back pain, but its comparative safety still makes a trial reasonable.
Avoid as routine therapy for chronic neck pain, over 12 weeks Regular NSAID use -- unlike the acute setting, evidence of benefit is weak and contradictory in chronic neck pain, while GI and cardiovascular risk continues to accumulate with prolonged use.
Special situation -- significant, multi-site muscle spasm or tenderness, short course only, no more than 1-2 weeks A muscle relaxant (e.g., cyclobenzaprine or methocarbamol) may be added when an NSAID or acetaminophen alone is inadequate; counsel explicitly on sedation before driving or operating machinery. Evidence for benefit specific to neck pain is limited, and a current evidence-based guideline recommends against muscle relaxants for neck pain altogether -- reserve for a genuinely short course rather than routine use.
Avoid as a routine choice Opioids, including tramadol or codeine, for mechanical neck pain or whiplash -- the benefit over non-opioid therapy is marginal while the risks (sedation, dependence, misuse) are real. Reserve for severe pain unresponsive to the measures above, prescribed per the 2017 Canadian opioid guideline, starting at the lowest effective dose for 3-5 days before mandatory review, and generally only after -- not before -- a trial of an anti-inflammatory or another non-opioid option.[6]
Not recommended Intravenous corticosteroid (methylprednisolone) for acute whiplash -- a single trial suggested reduced pain and sick leave at 1 week but not at 6 months, and the immunosuppression and pulmonary-infection risk of high-dose corticosteroid therapy means this remains investigational, not a chapter recommendation.
Chronic neck pain, over 12 weeks
1st line A coordinated nonpharmacologic program -- individually supervised active exercise and, when function is significantly impaired or work return has failed, a multidisciplinary or psychosocial intervention -- rather than medication alone (see Non-Pharmacologic Treatment).
Special situation -- comorbid depression, anxiety, or centralized/widespread pain features Assess and treat the comorbidity directly; a tricyclic antidepressant (e.g., amitriptyline) is widely used for soft-tissue pain but has not been proven effective specifically for mixed musculoskeletal or soft-tissue pain, so choose it primarily to treat a comorbid indication rather than expecting it to resolve the neck pain itself.
Special situation -- opioid trial, only after non-opioid pharmacotherapy and a nonpharmacologic program have failed Optimize non-opioid therapy first; screen for substance-use and psychiatric risk factors before starting; follow the full dosing, tapering, and monitoring framework of the 2017 Canadian opioid guideline.[6]
Non-Pharmacologic Treatment
- Patient education and reassurance about the generally favourable natural history of mechanical neck pain and most whiplash -- deliver this explicitly, not as an assumed default.
- Encourage early, active return to normal activity and work as tolerated; avoid bed rest and avoid routine cervical collar use (see Choose Initial Treatment).
- Individualized cervical, scapulothoracic, and shoulder-girdle stretching and strengthening exercise, progressing as tolerated -- the single best-supported nonpharmacologic intervention at every stage, from acute through chronic neck pain.[7][8]
- Self-applied heat can be recommended for symptomatic relief; cold application is reasonable if the patient finds it more soothing.[1]
- Manual therapy (mobilization or spinal manipulation) may be offered, most often combined with active exercise rather than used alone -- evidence for manual therapy used alone in subacute and chronic neck pain is limited and low quality[9] -- and only by a practitioner with certified manual-therapy skills and appropriate screening for contraindications, since there is a small but real risk of vertebrobasilar stroke after cervical manipulation.[10]
- Massage may add benefit when combined with manual therapy; evidence for massage used alone is poor, and massage should not be used as a stand-alone treatment for acute neck pain.
- Cognitive behavioural therapy (CBT) may give short-term pain relief for subacute neck pain as part of a multimodal plan, though it has not shown a clear benefit on disability in chronic neck pain by itself.
- For subacute or chronic neck pain with ongoing work absence: a coordinated, timelined return-to-work plan involving the workplace -- this drives successful return to work more reliably than the specific clinic treatment modality chosen.
- Individually supervised active exercise programs, rather than group exercise classes, can improve pain and function in chronic neck pain; no single supervised program has been shown superior to another.
- Evidence is weak, contradictory, or insufficient for several other modalities, and they are not routinely recommended: acupuncture (outside a combined-with-activation chronic-pain setting), dry needling, magnetic therapy, transcutaneous electrical nerve stimulation, mechanical traction, electrotherapy, laser therapy, and ultrasound.
- Interventional and procedural options exist for refractory chronic neck pain or radiculopathy but require specialist referral and generally lack consistent supporting evidence: local anesthetic infiltration of trigger or tender points may give short-term relief; epidural or facet (zygapophyseal) joint corticosteroid injection has inadequate evidence for chronic neck pain outside radicular symptoms; onabotulinumtoxinA injection has not shown benefit for pain or disability in subacute or chronic neck pain compared with other treatments and is not recommended for this indication; a short course of epidural or selective nerve root corticosteroid injection may give short-term relief specifically for radicular symptoms.
- Expert opinion favours multidisciplinary pain management for chronic neck pain with impaired function and failed work return, coordinated with the workplace and, where applicable, the compensation system.
Special Populations
Pregnancy
Neck pain is commonly exacerbated during pregnancy, particularly with coexistent low back pain and weight gain. Acetaminophen at therapeutic doses is an appropriate 1st-choice analgesic. Short-term NSAID use may be considered in the 1st or 2nd trimester, but NSAIDs should be avoided in the 3rd trimester given the risk of premature closure of the fetal ductus arteriosus, neonatal pulmonary hypertension, and reduced amniotic fluid from fetal renal effects with use from around 20 weeks onward -- see the Low Back Pain chapter for the complete trimester-specific NSAID monitoring detail, which applies identically here. Avoid muscle relaxants (cyclobenzaprine, methocarbamol, orphenadrine, baclofen) given insufficient pregnancy safety data. Avoid opioids where possible; if truly needed, use the lowest effective dose for the shortest possible time.
Breastfeeding
Acetaminophen at therapeutic doses is appropriate. Ibuprofen has been used safely during breastfeeding. If an opioid is used at all, limit it to 2-3 days with toxicity counselling for both the breastfeeding parent and the infant -- see the Low Back Pain chapter for complete breastfeeding-specific dosing detail across the shared analgesic classes covered there.
Pediatrics
This chapter addresses adult mechanical neck pain and whiplash. Neck pain in a child or adolescent is much less common than in an adult and warrants a lower threshold for further assessment rather than being managed with this adult algorithm -- pediatric-specific dosing for the drugs in this chapter is not established here.
Older adults
Muscle relaxants (cyclobenzaprine, methocarbamol, orphenadrine, baclofen, tizanidine) are not recommended in patients over 65 given increased sedation and fall risk. NSAIDs carry higher GI, renal, and cardiovascular risk in this population -- try a topical NSAID or acetaminophen first, and use the lowest effective oral NSAID dose for the shortest duration if one is needed. Before any manual therapy or manipulation, screen carefully for vertebral artery disease risk factors and osteoporosis-related fracture risk, both more common with age.
Renal and hepatic impairment
Avoid NSAIDs, including a topical NSAID used over a large area or for a prolonged period, in significant renal impairment. Acetaminophen requires a lower total daily dose and closer monitoring in significant hepatic impairment. Gabapentin requires renal dose adjustment.
Monitoring & Follow-Up
- Acute, 1-7 days: reassess for a red flag that may have since developed, or for a need for urgent surgical referral (WAD-IV).
- Acute, 1-4 weeks: track return to function and activity, not pain score alone, as the primary marker of progress.
- Subacute, 4-6 weeks: reassess if symptoms or work absence have not resolved -- this is the trigger point to screen, or re-screen, explicitly for yellow flags and to reconsider imaging if not already done.[1]
- Chronic: scheduled follow-up with explicit functional goals, not pain intensity alone, tracked at each visit.
- Whenever a muscle relaxant is prescribed: confirm the course is limited to 1-2 weeks and reassess sedation and fall risk at follow-up.
- Whenever an opioid is prescribed: confirm an agreed tapering strategy was documented before starting, and reassess the ongoing need and morphine-equivalent dose at every refill.[6]
- Before or after manual therapy or manipulation: confirm no new neurologic symptom suggesting vertebral artery dissection has developed.
Common Errors to Avoid
- Prescribing a cervical collar or bed rest for uncomplicated (WAD-I to WAD-III) neck pain or whiplash -- prolonged immobilization is now understood to delay, not speed, recovery for the large majority of patients.
- Ordering imaging for acute or recurrent neck pain without a red flag, or skipping the Canadian C-Spine Rule after trauma before deciding whether imaging is required.
- Reflexively combining an NSAID with a muscle relaxant and/or an opioid -- this combination increases sedation and adverse effects without clearly improving pain or function over a single agent.
- Continuing a muscle relaxant beyond a short, 1-2 week course, or using one routinely in a patient over 65.
- Starting an opioid as 1st-line therapy, or continuing one beyond 3-5 days for acute pain without a documented review.
- Missing a cervical myelopathy red flag -- gait disturbance, bilateral limb symptoms, or new bowel or bladder dysfunction always needs same-day urgent assessment, not a trial of conservative therapy first.
- Missing a possible vertebral artery dissection in a patient with sudden severe neck pain or headache plus a neurologic symptom, especially after trauma or before referring for manual therapy or manipulation.
- Assuming acetaminophen gives a clear analgesic benefit for neck pain specifically -- current evidence does not support this; it is chosen for safety, not superior effectiveness.
- Failing to screen for yellow flags once symptoms or work absence pass the 4-week mark.
- Managing chronic neck pain with medication alone, without a coordinated exercise-based and, where indicated, workplace-integrated plan.
- Treating whiplash and ordinary mechanical neck pain as identical when a WAD or Bone and Joint Decade grade has not actually been documented -- grade drives the collar-exception decision and referral urgency.
Clinical Decision Algorithm
Drug Tables
How to use this table: doses are adult doses for mechanical neck pain, whiplash, and cervical radiculopathy and require patient-specific confirmation, including renal/hepatic adjustment. This chapter does not establish pediatric dosing -- see Special Populations. See the Acute Pain and Low Back Pain chapters for the complete shared-class dosing detail (including the full strong-opioid ladder) and the Neuropathic Pain chapter for gabapentinoid/tricyclic titration schedules used here for a neuropathic-featured component. Select any drug name to open its complete Pharmasist Drug Database page.
Nonopioid analgesics
| Drug | Dosage | Adverse effects | Comments |
|---|---|---|---|
| Acetaminophen | Adults: 325-650 mg PO Q4H PRN or scheduled | Hepatotoxicity with chronic high-dose or acute overdose use | Evidence does not support a clear efficacy benefit over placebo for neck pain specifically -- chosen for its comparative safety over an NSAID, not superior effectiveness. Total intake from all sources must not exceed 4 g/day. |
NSAIDs, oral
No NSAID or COX-2 inhibitor has been shown more effective than another for neck pain specifically -- select by GI/cardiovascular risk and tolerability. Oral route only; do not use a parenteral NSAID for neck pain. Avoid in severe renal impairment.
| Drug | Dosage | Adverse effects | Comments |
|---|---|---|---|
| Ibuprofen | Adults: 400-600 mg PO Q6-8H Maximum: 2400 mg/day | GI toxicity, cardiovascular risk, nephrotoxicity | Doses of 2400 mg/day or more carry increased cardiovascular event risk -- avoid at this dose with cardiovascular disease or risk factors. |
| Naproxen | Adults: 500-1000 mg/day PO divided Q8-12H Sustained-release alternative: 750 mg PO once daily | GI toxicity, cardiovascular risk, nephrotoxicity | A reasonable default oral NSAID given a comparatively favourable cardiovascular profile among nonselective NSAIDs. |
| Naproxen sodium | Nonprescription strength: 220 mg PO Q8-12H Prescription strength: 825-1375 mg/day PO divided Q6-12H | GI toxicity, cardiovascular risk, nephrotoxicity | Same active drug as naproxen above in a different salt/strength labelling. |
| Celecoxib | Adults: 100 mg PO BID or 200 mg PO once daily | GI toxicity (less than nonselective NSAIDs), cardiovascular risk (not lower than nonselective agents), nephrotoxicity | Contraindicated with sulfonamide allergy, though cross-reactivity is uncommon. Avoid in ischemic heart disease, cerebrovascular disease, or heart failure. |
| Meloxicam | Adults: 7.5-15 mg PO once daily | GI toxicity, cardiovascular risk, nephrotoxicity | Once-daily dosing may support adherence. |
NSAIDs, topical
Minimal systemic absorption -- a reasonable option to reduce systemic NSAID exposure, particularly with GI or renal risk factors.
| Drug | Dosage | Adverse effects | Comments |
|---|---|---|---|
| Diclofenac diethylamine 1.16%/2.32% gel | Adults: Apply to the affected area 3-4 times daily | Local skin irritation or dryness; hypersensitivity | For external use only. Available without a prescription. |
Muscle relaxants
Evidence for benefit in neck pain is limited and inconsistent, and a current evidence-based guideline recommends against muscle relaxants for neck pain altogether -- reserve for significant muscle spasm, short-course use only (no more than 1-2 weeks). Not recommended in patients over 65. Avoid in pregnancy (insufficient safety data).
| Drug | Dosage | Adverse effects | Comments |
|---|---|---|---|
| Cyclobenzaprine | Adults: 5-10 mg PO TID, or as a single bedtime dose | Drowsiness, dry mouth, dizziness, fatigue, nausea, constipation | Structurally similar to tricyclic antidepressants. Can be given as a single nighttime dose. Do not use with an MAOI. |
| Methocarbamol | Initial, first 48-72h: Up to 1500 mg PO QID Maintenance: 750-1500 mg PO TID-QID | Drowsiness, dizziness, headache, nausea, GI upset, harmless brown/black/green urine discolouration | Also available in combination with a nonprescription analgesic. |
| Orphenadrine | Adults: 100 mg PO BID (sustained-release) | Dry mouth, blurred vision, drowsiness, constipation, tachycardia; overdose can be life-threatening | Can be given as a single nighttime dose. Significant anticholinergic burden -- avoid with other anticholinergic drugs where possible. |
| Baclofen | Initial: 5 mg PO TID Maximum: 20 mg PO TID | Sedation, muscle weakness, nausea, dizziness; rare hepatotoxicity | Adjust dose gradually to minimize adverse effects or withdrawal symptoms on discontinuation. |
| Tizanidine | Initial: 2 mg PO BID Maximum: 4 mg PO TID | Sedation, dizziness, dry mouth, weakness, hypotension, hepatotoxicity (monitor LFTs) | Adjust dose gradually to minimize adverse effects or withdrawal symptoms (e.g., rebound hypertension) on discontinuation. |
Benzodiazepine (short-term muscle relaxant use)
| Drug | Dosage | Adverse effects | Comments |
|---|---|---|---|
| Diazepam | Adults: 2-5 mg PO BID-QID, short course | Drowsiness, cognitive impairment, dependence with continued use, falls, accumulation in hepatic/renal impairment and in older adults | Short-term use only for acute pain. Not recommended in the elderly. Potentiates opioid and alcohol CNS depression. |
GABA derivatives
Not a Health Canada-approved indication for neck pain -- clinical experience only. May be considered for cervical radiculopathy with a neuropathic component or chronic neck pain with pain/tenderness across multiple sites; see the Neuropathic Pain chapter for a complete titration schedule.
| Drug | Dosage | Adverse effects | Comments |
|---|---|---|---|
| Gabapentin | Initial: 300-400 mg/day PO in 3 divided doses Maximum: 3600 mg/day PO in 3 divided doses | Sedation, ataxia, tremor, peripheral edema, GI upset, vision changes | Taper over at least 1 week to discontinue -- do not stop abruptly. Aluminum/magnesium antacids reduce absorption. |
| Pregabalin | Initial: 50-150 mg/day PO in 2 divided doses Maximum: 600 mg/day PO in 2 divided doses | Sedation, ataxia, edema, diplopia, weight gain, dry mouth | BID dosing is an advantage over gabapentin's TID regimen. |
Tricyclic antidepressant
Widely used for soft-tissue pain, but not proven effective specifically for mixed musculoskeletal/soft-tissue pain -- select primarily to treat a comorbid indication (depression, insomnia, neuropathic-featured pain).
| Drug | Dosage | Adverse effects | Comments |
|---|---|---|---|
| Amitriptyline | Initial: 10-25 mg PO at bedtime Typical effective range: 25-75 mg PO at bedtime, titrated as tolerated | Sedation, dry mouth, orthostatic hypotension, weight gain, QT prolongation at higher doses | Give as a single nighttime dose. Avoid in significant cardiac conduction disease. See the Neuropathic Pain chapter for a complete titration schedule. |
Opioids
Avoid as routine therapy at every stage. Reserve for severe pain unresponsive to the measures above, at the lowest effective dose, for the shortest duration, with mandatory review at 3-5 days. See the Low Back Pain chapter for the complete strong-opioid ladder (morphine, hydromorphone, oxycodone, transdermal fentanyl/buprenorphine) if a chronic neck pain trial reaches that level -- not duplicated here since dosing and stewardship principles are identical.
| Drug | Dosage | Adverse effects | Comments |
|---|---|---|---|
| Acetaminophen/codeine | Adults: 1-2 tablets PO QID PRN Maximum acetaminophen, all sources: 4 g/day | Nausea, vomiting, constipation, sedation, urinary retention, misuse potential | A significant minority of patients get little analgesic benefit from codeine because of CYP2D6 variability. |
| Tramadol | Controlled-release, initial: 100 mg PO once daily, titrate weekly Controlled-release, maximum: 300-400 mg/day depending on product | Seizure risk, sedation, ataxia, constipation, nausea, orthostatic hypotension, serotonin syndrome risk | Do not use within 14 days of an MAOI. Caution with drugs that lower seizure threshold or are serotonergic. |
| Tramadol/acetaminophen | Adults: 1-2 tablets PO Q4-6H PRN Maximum: 8 tablets/day | Same as tramadol above, plus acetaminophen-related hepatotoxicity risk at high cumulative dose | 37.5 mg tramadol / 325 mg acetaminophen per tablet. |
References
- Clinical Practice Guideline: Nonspecific Neck Pain — Deutsches Arzteblatt International (El-Allawy A, Hecht N, Luedtke K, Schleicher P, Weidner N, Koetter T). Dtsch Arztebl Int 2025;122(20):552-557
- Scientific monograph of the Quebec Task Force on Whiplash-Associated Disorders: redefining "whiplash" and its management — Spine (Spitzer WO, Skovron ML, Salmi LR, et al.). Spine (Phila Pa 1976) 1995;20(8 Suppl):1S-73S
- A new conceptual model of neck pain: linking onset, course, and care -- the Bone and Joint Decade 2000-2010 Task Force on Neck Pain and Its Associated Disorders — Spine (Guzman J, Hurwitz EL, Carroll LJ, et al.). Spine (Phila Pa 1976) 2008;33(4 Suppl):S14-23
- Factors predicting outcome in whiplash injury: a systematic meta-review of prognostic factors — Journal of Orthopaedics and Traumatology (Sarrami P, Armstrong E, Naylor JM, Harris IA). J Orthop Traumatol 2017;18(1):9-16
- The Canadian C-Spine Rule for radiography in alert and stable trauma patients — JAMA (Stiell IG, Wells GA, Vandemheen KL, et al.). JAMA 2001;286(15):1841-1848
- Guideline for opioid therapy and chronic noncancer pain — Canadian Medical Association Journal (Busse JW, Craigie S, Juurlink DN, et al.). CMAJ 2017;189(18):E659-E666
- Exercises for mechanical neck disorders — Cochrane Database of Systematic Reviews (Gross A, Kay TM, Paquin JP, et al.). Cochrane Database Syst Rev 2015;1:CD004250
- The Treatment of Neck Pain-Associated Disorders and Whiplash-Associated Disorders: A Clinical Practice Guideline — Journal of Manipulative and Physiological Therapeutics (Bussieres AE, Stewart G, Al-Zoubi F, et al.). J Manipulative Physiol Ther 2016;39(8):523-564
- Treatment of neck pain: noninvasive interventions -- results of the Bone and Joint Decade 2000-2010 Task Force on Neck Pain and Its Associated Disorders — Spine (Hurwitz EL, Carragee EJ, van der Velde G, et al.). Spine (Phila Pa 1976) 2008;33(4 Suppl):S123-152
- Risk of vertebrobasilar stroke and chiropractic care: results of a population-based case-control and case-crossover study — Spine (Cassidy JD, Boyle E, Cote P, et al.). Spine (Phila Pa 1976) 2008;33(4 Suppl):S176-183
Professional reference only. Apply clinical judgment and verify patient-specific decisions against current authoritative guidance and product information.