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Abstract
Background: Non-steroidal anti-inflammatory drugs (NSAIDs) are frequently used for reducing pain and other symptoms in osteoarthritis (OA). NSAIDs have been associated with an increase in blood pressure (BP) in both normotensive and hypertensive individuals and a blunting effect on various anti-hypertensive medications. Acetaminophen effects on anti-hypertensive treatment, instead, are still a matter of debate.
Objectives: To assess the effect of naproxen versus acetaminophen on ramipril, valsartan and aliskiren therapy in hypertensive patients with OA in a double-blind, cross-over study, by measuring clinic, ambulatory BP and heart rate (HR).
Results: One hundred seventy four patients were randomly treated with ramipril, valsartan or aliskiren for 8 weeks and 135 patients with normalized BP were randomized to receive naproxen or acetaminophen for 2 weeks. Naproxen significantly increased clinic and ambulatory systolic/diastolic BP (SBP/DBP) values in patients treated with ramipril (p < 0.01) or valsartan (p < 0.05), but did not affect aliskiren effects. Also acetaminophen slightly but significantly affected clinic and ambulatory SBP/DBP in all three groups and, surprisingly, it also produced a slight increase in HR (+3.1, +3.3 and +3.4 b/min day-time HR values, for ramipril, valsartan and aliskiren, respectively; p < 0.05).
Conclusions: Both naproxen and acetaminophen can affect anti-hypertensive therapy with ramipril, valsartan or aliskiren with a different extent. When acetaminophen is chosen for OA management in subjects with hypertension, patients should be evaluated as carefully as when traditional NSAIDs are given.