Bottom line

Review of each lab

Important separate finding: microcytic anemia

1. Iron deficiency, including occult gastrointestinal blood loss
2. Thalassemia trait, particularly because the RBC count is relatively preserved/high despite a low MCV
3. Less commonly, other causes

Review of prescriptions

• Naprosyn 500 mg, likely naproxen 500 mg twice daily, prescribed for about 14 days. This is an NSAID anti-inflammatory pain medicine.
• A medicine written as “Provas-N Forte” or similar, but I cannot reliably identify the active ingredients from the photo.
• An earlier prescription appears to include a stomach-protective medicine, possibly esomeprazole 20 mg, plus other medicines that are not legible enough to identify confidently.
• The note from the medical clinic documents pain/tenderness in wrists, knees and shoulders, difficulty walking and restricted movement. It also requests CBC, rheumatoid factor, anti-CCP, CPK and some additional tests. I do not see a CPK result among the attached reports.

Medication safety

• Do not combine naproxen with other NSAIDs or painkillers such as ibuprofen, diclofenac, ketorolac, etoricoxib, celecoxib, or aspirin for pain unless the prescriber explicitly directs it.
• NSAIDs can cause gastritis, ulcers, bleeding, raised blood pressure, fluid retention, and kidney injury. This is particularly relevant because he also has possible iron-deficiency anemia.
• If black stools, vomiting blood, severe upper abdominal pain, reduced urine, facial swelling, breathlessness, or a rash occurs, seek urgent care.
• “High-potency” pain medicines without relief are a reason to reassess the diagnosis, not simply escalate analgesics.

What the pattern does and does not suggest

Less likely from the available information

• Classic rheumatoid arthritis: RF and anti-CCP are negative and ESR/CRP are normal. Also, classic RA usually prominently affects small joints of both hands and feet, although this is not absolute.
• Active gout: uric acid is not elevated and the history is not of sudden, intensely hot/red, single-joint attacks.
• Septic arthritis: less likely in a 4-month multi-joint course with normal ESR/CRP, but it cannot be dismissed if any joint is hot, markedly swollen, or there is fever.
• Diabetic joint disease or kidney-related pain: glucose, HbA1c and renal function do not support these.

Still possible and should be actively checked

• Seronegative inflammatory arthritis: RA can occasionally be seronegative. Psoriatic arthritis, reactive arthritis and other spondyloarthritides may also have negative RF and anti-CCP.
• Mechanical / degenerative joint disease and tendon disorders: this is more consistent with pain that worsens with movement and normal inflammatory markers. The clinical distinction is important: inflammatory arthritis is generally worse after rest or in the morning and improves with movement, whereas osteoarthritis/mechanical pain is often provoked by activity. Rheumatology, 2-Volume Set, p. 274.
• Vitamin D deficiency or metabolic bone disease: common and not yet tested.
• Myopathy: if the main issue is weakness, difficulty rising from a chair, or lifting arms rather than joint swelling, obtain the requested CK/CPK.
• Fibromyalgia / central pain sensitization: possible if there is widespread pain, poor sleep, fatigue, headaches, anxiety, bowel symptoms, and no objective joint inflammation. There is not enough information to label this yet.

Next steps

1. Arrange a rheumatology appointment soon, ideally within 1-2 weeks, because symptoms have persisted 4 months, affect more than one joint, and are disabling. Normal ESR/CRP, RF and anti-CCP should not delay assessment if examination suggests persistent synovitis. NICE guidance specifically recommends urgent specialist referral for persistent synovitis affecting more than one joint, even when RF, anti-CCP and acute-phase markers are normal.
2. At that visit, document:
   • Which joints are visibly swollen or warm
   • Whether symptoms are symmetric
   • Morning stiffness duration
   • Psoriasis or nail pitting
   • Red/painful eyes, inflammatory back or buttock pain
   • Recent diarrhea, urinary/genital infection
   • Fever, weight loss, mouth ulcers, rash, hair loss, Raynaud symptoms
   • Family history of psoriasis, inflammatory bowel disease, arthritis, thalassemia
3. Discuss targeted investigations:
   • Ferritin, iron studies, peripheral smear, hemoglobin electrophoresis
   • Vitamin D, calcium, phosphate, PTH
   • TSH
   • CK/CPK, as requested, especially if weakness is present
   • Hepatitis B/C testing if inflammatory arthritis treatment is being considered
   • ANA only if symptoms suggest lupus/connective-tissue disease, rather than as a random screening test
4. Imaging should follow examination:
   • X-rays of symptomatic knees and shoulders, plus wrists/hands if there is hand/wrist swelling
   • Musculoskeletal ultrasound with Doppler of painful/swollen wrist or knee if the exam is uncertain. It can identify synovitis, tendon inflammation and joint effusion.
   • If there is a knee effusion, aspiration of joint fluid for cell count, culture and crystals should be considered before steroid injection.

Seek urgent same-day care if

• A joint becomes red, hot, very swollen, or suddenly much more painful
• Fever, chills, or feeling seriously unwell
• Inability to bear weight or use an arm
• New rash, painful red eye, chest pain, breathlessness
• Black stool or vomiting blood while taking naproxen/other pain medicines