Pharmacology · patient case question
Which analgesic is the most appropriate choice for this patient?
Patient case: Spontaneous toothache on antihypertensive therapy
Patient: Female, 54 years old
Chief complaint: “This tooth throbs for twenty minutes after anything cold. It woke me up last night.”
History: Hypertension, controlled. Medications: hydrochlorothiazide, lisinopril. No known allergies.
Findings: Tooth #19 has a deep distal-occlusal carious lesion. Cold provokes a sharp pain that lingers about 20 minutes. Percussion is mildly tender. Probing depths 2–3 mm throughout with no bleeding on probing; the periapical shows an intact lamina dura and normal bone levels.
Show answer and explanation
Correct answer: A. Acetaminophen
- A. CORRECT. This patient is on an ACE INHIBITOR plus a THIAZIDE DIURETIC. NSAIDs inhibit renal prostaglandins, which the kidney relies on to maintain afferent arteriolar dilation. Combining an NSAID with an ACE inhibitor and a diuretic is the recognised “TRIPLE WHAMMY” that precipitates acute kidney injury, and NSAIDs also blunt the antihypertensive effect of both drugs. ACETAMINOPHEN carries none of these interactions and is the correct choice.
- B. Ibuprofen would normally be first-line for pulpal pain because inflammatory pain is prostaglandin-driven, but the ACE inhibitor plus diuretic combination makes it the wrong choice here.
- C. Naproxen is an NSAID with the same interaction profile, and its longer half-life prolongs the renal and blood-pressure effects.
- D. Ketorolac is among the most nephrotoxic NSAIDs and is explicitly contraindicated with this drug combination.
Note: The definitive treatment is still endodontic. Analgesics buy time; they do not treat an inflamed pulp.