In a 64-year-old man with severe right hip osteoarthritis, inadequate relief from acetaminophen, a history of peptic ulcer disease, atrial fibrillation treated with apixaban, hypertension, obesity, and the described physical exam findings, which of the following is the most appropriate next treatment: oxycodone as needed, intra‑articular hyaluronic acid, intra‑articular corticosteroid injection, or ibuprofen as needed?

Intra-articular Corticosteroid Injection

For this patient with severe hip osteoarthritis who has failed acetaminophen therapy, you should recommend intra-articular corticosteroid injection with ultrasound guidance. This is the most appropriate next step given his multiple contraindications to other options and the strong evidence supporting this intervention.

Rationale for This Recommendation

Why Corticosteroid Injection is the Best Choice

The 2019 ACR/Arthritis Foundation guideline strongly recommends intraarticular glucocorticoid injections for patients with hip OA 1. Critically, the guideline emphasizes that ultrasound guidance for steroid injection into hip joints is strongly recommended to ensure accurate drug delivery 1. This patient has clear clinical and radiographic evidence of severe hip OA with failed conservative management, making him an ideal candidate.

The EULAR 2021 recommendations support this approach, noting that intra-articular glucocorticoids provide short-term efficacy for acute exacerbations of joint pain, particularly when accompanied by functional limitation 2. The ACR guideline further states that intraarticular glucocorticoid injection is conditionally recommended over other forms of intraarticular injection, including hyaluronic acid preparations, as the evidence for efficacy of glucocorticoid injections is of considerably higher quality 1.

Why the Other Options Are Inappropriate

Option A (Oxycodone): This patient is on apixaban for atrial fibrillation. The FDA label clearly warns that apixaban increases bleeding risk, including intra-articular bleeding 3. While opioids might provide pain relief, they carry significant risks in a 64-year-old with multiple comorbidities, including potential for dependence, falls, and cognitive impairment. The ACR guideline does not prioritize opioids for OA management 1.

Option B (Intra-articular Hyaluronic Acid): The ACR guideline explicitly states that glucocorticoid injections are preferred over hyaluronic acid because head-to-head comparisons show the evidence for efficacy of glucocorticoid injections is of considerably higher quality 1. Additionally, research indicates that hyaluronic acid injections are not effective for OA 4.

Option D (Ibuprofen): This is contraindicated in this patient. He has:

• Peptic ulcer disease (PUD): NSAIDs carry high risk of GI complications, with active gastroduodenal ulcer being a major contraindication 5, 6
• Atrial fibrillation on apixaban: The combination of NSAIDs with anticoagulants dramatically increases bleeding risk. The survey of rheumatologists identified NSAIDs with vitamin K antagonists as the most concerning combination (96.3%) 6, and this concern extends to all anticoagulants including apixaban
• Hypertension: NSAIDs can exacerbate hypertension and should be avoided when possible in patients with cardiovascular risk 5
• Age 64 with multiple comorbidities: Chronic NSAID use in older adults increases risk of peptic ulcer disease, acute renal failure, and cardiovascular events 7

Clinical Pearls and Caveats

Important Considerations for the Injection

• Ultrasound guidance is mandatory for hip injections to ensure accurate intra-articular delivery 1
• Use aseptic technique 2
• This patient is on apixaban, but IAT is not a contraindication in people taking antithrombotic medications unless bleeding risk is high 2. The benefit of the injection outweighs the minimal increased bleeding risk in this case
• Advise the patient to avoid overuse of the injected joint for 24 hours following injection, but immobilization is discouraged 2

What to Expect

• Corticosteroid injections demonstrate short-term efficacy in OA 1
• The shared decision to reinject should consider benefits from previous injections and other individualized factors 2
• If the injection provides significant relief, it can be repeated, though the optimal frequency is not well-established 1

Long-term Management

While the corticosteroid injection addresses immediate pain relief, this patient will likely need:

• Continued exercise and physical therapy (beneficial for OA) 4
• Consideration of duloxetine as an alternative systemic agent if pain persists 1
• Eventual evaluation for joint replacement if conservative measures fail, as he has severe radiographic disease 4

Why Acetaminophen Failed

The ACR guideline notes that acetaminophen has very small effect sizes and may be ineffective as monotherapy for most individuals 1. This patient's failure to respond to maximum-dose acetaminophen (1000 mg every 8 hours = 3 grams daily) is not surprising given his severe disease 8, 9.