How should I manage a 57-year-old man with uncontrolled hypertension on amlodipine, valsartan, and hydrochlorothiazide, who has leg pain and swelling after a blunt injury one month ago, a sore throat, feels hot constantly, and has uncertain medication compliance?

Management of Uncontrolled Hypertension with Uncertain Compliance and Additional Symptoms

Your first priority is to assess medication adherence through direct questioning and consider chemical adherence testing, as nonadherence is the most common cause of apparent resistant hypertension and this patient is already on appropriate triple therapy (amlodipine/valsartan/HCTZ). 1

Immediate Assessment Priorities

1. Medication Adherence Evaluation

• Directly ask about missed doses, pill-taking patterns, and barriers to adherence - this is critical since the patient's compliance is already uncertain
• Consider chemical adherence testing (urine or blood) to detect presence of amlodipine, valsartan, and hydrochlorothiazide 1
  • Amlodipine has slow elimination; HCTZ has rapid elimination
  • Detection of only amlodipine suggests sporadic dosing (white coat adherence)
• Review pharmacy refill records to assess prescription pickup patterns

2. Blood Pressure Confirmation

• Verify BP elevation with multiple readings on separate occasions
• Rule out white coat hypertension with home BP monitoring or ambulatory BP monitoring
• Current BP of 159/114 mmHg is significantly above goal of <130/80 mmHg 2

3. Address the Leg Symptoms (Critical - Rule Out DVT)

The one-month history of leg pain and swelling after trauma requires immediate evaluation for deep vein thrombosis (DVT):

• Persistent swelling one month post-trauma is abnormal
• Perform Wells score assessment
• Obtain D-dimer if indicated
• Consider venous duplex ultrasound
• Note: Peripheral edema is also a common side effect of amlodipine 3, 4, but trauma history and duration make DVT evaluation mandatory

4. Evaluate Systemic Symptoms

The sore throat and feeling "hot all the time" warrant:

• Check for fever and signs of infection (pharyngitis)
• Consider thyroid function tests (hyperthyroidism can cause heat intolerance and elevated BP)
• Rule out other secondary causes of hypertension given apparent treatment resistance

Management Algorithm for Resistant Hypertension

If Nonadherence is Confirmed:

1. Address barriers to adherence:

   • Simplify regimen if possible (patient is already on appropriate triple combination)
   • Discuss side effects (amlodipine can cause edema, which may be contributing to leg swelling)
   • Consider cost issues, pill burden, or other practical barriers
   • Provide education on hypertension complications

2. Optimize current regimen before adding medications:

   • Ensure maximum tolerated doses: valsartan up to 320 mg daily, amlodipine up to 10 mg daily, HCTZ 25 mg daily 3
   • Consider switching HCTZ to chlorthalidone or indapamide (more potent thiazide-like diuretics) 2

If Adherence is Confirmed (True Resistant Hypertension):

Per 2025 AHA/ACC guidelines, you must perform a detailed evaluation for secondary causes 2:

1. Screen for secondary hypertension:

   • Primary aldosteronism (most common in resistant HTN)
   • Obstructive sleep apnea
   • Renal parenchymal disease
   • Renovascular disease
   • Check basic metabolic panel, renal function

2. Review all medications for BP-interfering effects:

   • NSAIDs (common culprit)
   • Decongestants
   • Stimulants
   • Herbal supplements
   • Remove or replace interfering medications 2

3. Add mineralocorticoid receptor antagonist (MRA):

   • If eGFR ≥45 mL/min/1.73 m², add spironolactone or eplerenone 2
   • This is the Class 1, Level B-R recommendation for uncontrolled resistant hypertension
   • Monitor potassium levels regularly 3

Specific Medication Considerations

Current Triple Therapy Assessment:

• The combination of amlodipine/valsartan/HCTZ is evidence-based and effective 5, 6, 7
• Studies show 72-75% BP control rates with this combination 8
• Well-tolerated with peripheral edema as most common side effect 7, 9

Dosing Verification:

• Confirm patient is on adequate doses (not provided in your case)
• Maximum doses: amlodipine 10 mg, valsartan 320 mg, HCTZ 25 mg 3

Critical Pitfalls to Avoid

1. Do not add a fourth medication before:

   • Confirming adherence
   • Ruling out white coat hypertension
   • Screening for secondary causes
   • Ensuring maximum tolerated doses of current medications

2. Do not ignore the leg symptoms - DVT must be ruled out given trauma history and persistent swelling

3. Do not overlook medication interactions:

   • NSAIDs can significantly blunt antihypertensive effects
   • Potassium-containing supplements with valsartan can cause hyperkalemia 3

4. Do not assume peripheral edema is only from amlodipine - consider DVT, heart failure, or renal issues

Next Steps Summary

1. Immediate: Rule out DVT with appropriate testing
2. Urgent: Assess medication adherence (direct questioning, pill counts, pharmacy records, consider chemical testing)
3. Concurrent: Evaluate sore throat and heat intolerance (infection, thyroid)
4. If adherent: Screen for secondary hypertension and medication interference
5. If truly resistant: Add MRA (spironolactone/eplerenone) if eGFR ≥45 2
6. Monitor: Potassium and renal function regularly with current and any additional medications