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Query: UMLS:C0344307 (analgesia)
 28,200 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The cold-pressor test is a widely used pain-induction model in humans. This method has been shown to be a sensitive measure for detecting opioid analgesia. However, nonsteroidal anti-inflammatory drugs have not produced consistent analgesic effects with use of this model. The analgesic effect of acetaminophen (INN, paracetamol) on cold pressor-induced pain has not been reported by other investigators. In this study, a double-blind, randomized, placebo-controlled design was used to evaluate the dose-related effects of oral acetaminophen on cold pressor-induced pain in 18 normal healthy human subjects. We observed dose-related analgesic activity of oral acetaminophen using the cold pressor-induced pain model in these subjects. There were statistically significant main effects of both dose and time (pain and bothersomeness ratings decreased with increasing drug dose and increased over time). In pairwise comparisons only the contrast between the highest dose of acetaminophen (1000 mg) and placebo reached statistical significance. Results from our study suggest that the cold-pressor method may have clinical value in evaluating nonopioid analgesic agents.
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PMID:Dose-related effects of oral acetaminophen on cold-induced pain: a double-blind, randomized, placebo-controlled trial. 954 81

In a randomized double-blind study, 120 patients with moderate to strong pain after surgical removal of wisdom teeth were given the following in single oral doses: 100-mg enteric-coated diclofenac tablets; 1 g acetaminophen (INN, paracetamol); 1 g acetaminophen plus 60 mg codeine; 100-mg enteric-coated diclofenac tablets plus 1 g acetaminophen; or 100-mg enteric-coated diclofenac tablets plus 1 g acetaminophen plus 60 mg codeine. Patients recorded pain intensity and pain relief for 8 hours. Upside assay sensitivity was confirmed because acetaminophen plus codeine was superior to acetaminophen. Diclofenac plus acetaminophen with and without codeine had superior analgesic effect compared with diclofenac, acetaminophen, or acetaminophen plus codeine. Addition of 60 mg codeine increased the degree of side effects. These results support the clinical practice of combining diclofenac with acetaminophen for acute pain. Of clinical importance are superior and prolonged analgesia and fewer side effects after enteric-coated diclofenac tablets plus acetaminophen compared with acetaminophen plus codeine.
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PMID:Combining diclofenac with acetaminophen or acetaminophen-codeine after oral surgery: a randomized, double-blind single-dose study. 1061 19