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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

The morphine-sparing effect of propacetamol in orthopedic postoperative pain.

The analgesic efficacy and safety of propacetamol (Pro-Dafalgan), an injectable prodrug of acetaminophen, in combination with morphine administered by patient-controlled analgesia (PCA) were studied in 60 patients (56 men, 4 women; age 18-40 years; mean age, 26 years) after knee ligamentoplasty. Using a double-blind, randomized, parallel-group design, the effects of four (every 6 hr) intravenous injections of 2 g propacetamol (= 1 g acetaminophen) were compared with four injections of placebo (PL) in the recovery room immediately after surgery. Efficacy was assessed over 24 hr by automatic recording on the PCA device of the cumulative dose of morphine and the number of boluses requested. It was also assessed on pain scores rated on a five-point verbal scale and a visual analogue scale before administration, at 1, 2, 3, and 4 hr, and then every 2 hr until the 24th hr after administration. A five-point global efficacy scale was also administered. Any side effects were recorded throughout the duration of the study, and the ability to tolerate the drug was assessed by recording arterial pressure, cardiac and respiratory frequency, and sedation at the same assessment times as the pain scores. The 24-hr morphine consumption was significantly decreased in the propacetamol group (number of 1 mg boluses: 14.7 +/- 11.3 versus 23.2 +/- 13.8, P = 0.01; PCA usage: 26.4 +/- 12.3 mg versus 34.6 +/- 15.4 mg, P = 0.03; PCA usage + titration: 34.5 +/- 12.7 mg versus 43.1 +/- 15.9 mg, P = 0.02).(ABSTRACT TRUNCATED AT 250 WORDS)[1]


  1. The morphine-sparing effect of propacetamol in orthopedic postoperative pain. Delbos, A., Boccard, E. Journal of pain and symptom management. (1995) [Pubmed]
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