What workup and treatment should be ordered for a patient with right shoulder pain and lower back pain, including a right shoulder x‑ray, complete blood count, comprehensive metabolic panel, referral to physical therapy, ibuprofen 400 mg, Voltaren (diclofenac) gel, and a two‑week follow‑up to consider a steroid injection?

Workup and Treatment for Right Shoulder Pain and Lower Back Pain

The proposed workup and treatment plan is appropriate and evidence-based, with right shoulder x-ray as the initial imaging, NSAIDs (ibuprofen 400 mg and Voltaren gel) for pain management, physical therapy for rehabilitation, and consideration of steroid injection at follow-up if conservative measures fail.

Initial Diagnostic Workup

Imaging

• Right shoulder x-ray is the preferred initial study and should include at minimum three views: anteroposterior (AP) views in internal and external rotation plus an axillary or scapula-Y view to properly evaluate for fracture, dislocation, and joint alignment 1, 2.
• The axillary or scapula-Y views are vital because acromioclavicular and glenohumeral dislocations can be misclassified on AP views alone 1, 2.
• No imaging is typically indicated for acute nonspecific lower back pain unless red flags are present (severe or progressive neurologic deficits, signs of cauda equina syndrome, or suspicion for systemic/pathologic causes) 3.

Laboratory Testing

• CBC and CMP are reasonable to exclude systemic causes if the clinical presentation suggests inflammatory arthritis, infection, or metabolic abnormalities 4.
• For shoulder pain specifically, these labs help rule out polymyalgia-like syndromes (elevated inflammatory markers) or other systemic conditions 4.

Conservative Treatment Approach

NSAIDs for Pain Management

• Ibuprofen 400 mg is appropriate for both shoulder and lower back pain, as analgesics such as acetaminophen or ibuprofen can be used for pain relief if there are no contraindications 5.
• Voltaren (diclofenac) gel may provide additional benefit for shoulder pain but is likely less effective than oral ibuprofen for lower back pain 6.
• A 2024 study found that oral ibuprofen improved low back pain by 10.1 points on the Roland Morris Disability Questionnaire versus 6.4 points for topical diclofenac, suggesting oral NSAIDs are superior for axial spine pain 6.
• For shoulder pain, topical diclofenac formulations significantly improve pain and function compared to placebo, with all formulations (gel, solution, patch) being well-tolerated 7.

Important NSAID Safety Considerations

• Monitor renal function and blood pressure in patients taking NSAIDs, especially those with preexisting hypertension, renal disease, or heart failure 8.
• Use the lowest effective dose for the shortest duration necessary, particularly in patients with cardiovascular risk factors 8.
• If the patient is taking aspirin for cardioprotection, ibuprofen should be taken at least 30 minutes after aspirin ingestion or at least 8 hours before to avoid interference with aspirin's antiplatelet effect 8.
• Consider GI prophylaxis (H2 blockers or proton pump inhibitors) for patients at high risk of gastrointestinal side effects 9.

Physical Therapy

• Physical therapy is strongly recommended for both shoulder pain and lower back pain 5.
• For shoulder pain, treatment should include gentle stretching and mobilization techniques, typically involving increasing external rotation and abduction, with active range of motion increased gradually while restoring alignment and strengthening weak muscles 5.
• For lower back pain, patients should be advised to remain active, as this is a cornerstone of both acute and chronic management 3.

Follow-Up and Escalation Strategy

Two-Week Follow-Up

• Reassess pain levels, functional status, and review x-ray findings to determine if conservative management is adequate 10.
• Evaluate for any adverse effects from NSAIDs, including gastrointestinal symptoms, renal dysfunction, or cardiovascular concerns 8.

Consideration of Steroid Injection

• Subacromial corticosteroid injections can be used when pain is thought to be related to injury or inflammation of the subacromial region (rotator cuff or bursa) in the shoulder 5, 11, 5.
• The evidence for corticosteroid injections is mixed: some studies show short-term pain reduction, while others show no significant benefit 11.
• Injections should be reserved for patients with verified shoulder joint pathology (ideally confirmed by ultrasound or MRI if x-rays are indeterminate) and inadequate response to conservative measures 11.
• For inflammatory arthritis patterns, intra-articular corticosteroid injection should only be considered if ≤2 joints are affected and low-dose prednisone (10 mg/day) and NSAIDs have been ineffective 12.

When to Consider Advanced Imaging or Specialist Referral

• If symptoms persist beyond 4-6 weeks despite conservative management, consider ultrasound or MRI to evaluate for rotator cuff tears, labral pathology, or other soft tissue injuries 4, 10.
• Refer to orthopedics or rheumatology if there is joint swelling (synovitis), progressive symptoms, or suspicion for inflammatory arthritis 4, 12.
• For lower back pain, surgical referral is indicated only in the presence of severe or progressive neurologic deficits or signs of cauda equina syndrome 3.

Common Pitfalls to Avoid

• Do not obtain MRI or CT as initial imaging for either shoulder or lower back pain without first obtaining plain radiographs and attempting conservative management 1, 2, 3.
• Avoid prolonged NSAID use without monitoring for cardiovascular, renal, and gastrointestinal complications 8.
• Do not perform steroid injections without first ensuring adequate trial of conservative therapy (typically 4-6 weeks of NSAIDs and physical therapy) 12, 11.
• For patients on aspirin, timing of ibuprofen administration is critical to avoid negating cardioprotective effects 8.