Articles: acetaminophen.
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Clinical Trial Controlled Clinical Trial
Treatment of migraine attacks with an analgesic combination (Mersyndol).
The relief of acute migraine attacks with an analgesic/antihistamine combination containing paracetamol, codeine phosphate, doxylamine succinate and caffeine (Mersyndol) compared with that achieved with a placebo has been studied in a double-blind, crossover trial. Mersyndol emerged as significantly better than placebo in the complete relief of migraine pain, and was clearly superior to placebo in partially relieving the pain of migraine. These results suggest that it could be a useful alternative to ergotamine, and a comparative trial with ergotamine is suggested. Side effects with this combination were fairly common but mild, and consisted mainly of drowsiness caused by the antihistamine component.
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Comparative Study
Quantitative comparison of the analgesic and anti-inflammatory activities of aspirin, phenacetin and acetaminophen in rodents.
The mild analgesic activities of aspirin, phenacetin and acetaminophen have been compared in the trypsin, kaolin and carrageenan hyperalgesic assays as well as in the acetic acid writhing test. The trypsin and kaolin hyperalgesic assays were designed to be unaffected by drugs with anti-inflammatory activity. Aspirin and acetaminophen were inactive in these two tests at dose levels devoid of side effects. ⋯ Both of these latter drugs were active in the carrageenan pleurisy and adjuvant arthritis models of inflammation. In all studies phenacetin was equipotent to or more potent than acetaminophen. The data suggest that the analgesia produced by aspirin and acetaminophen results from their anti-inflammatory activity whereas the analgesia produced by phenacetin has two components, one dependent on and one independent of anti-inflammatory activity.
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Eur. J. Clin. Pharmacol. · Mar 1976
Randomized Controlled Trial Comparative Study Clinical TrialEffect of paracetamol, mephenoxalone and their combination on pain following bone surgery.
Sixty patients suffering moderate postoperative pain after bone surgery were divided randomly into 3 treatment groups on the day following operation. Under double blind conditions they received either 400 mg mephenoxalone, a weak sedative, or 900 mg paracetamol, or the same doses of these drugs simultaneously, three times daily for three days. ⋯ However, during repeated administration over 3 days, the mean effect of the drug combination was slightly better than that of paracetamol or mephenoxalone alone. The drug combination did not induce more sedation or gastrointestinal side effects than either drug alone.
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The Journal of pathology · Nov 1975
Histopathological changes in the liver following a paracetamol overdose: correlation with clinical and biochemical parameters.
The histological appearances of the liver damage occurring after a paracetamol overdose are described in liver biopsies from 104 patients, of whom 38 developed fulminant hepatic failure. Confluent centrilobular necrosis of varying extent was followed by rapid disappearance of necrotic cells, leaving areas of reticulin collapse and a usually mild inflammatory reaction. ⋯ An HVF value (normal 85 +/- 5 per cent.) of less than 40 per cent. in a biopsy taken within 10 days of the overdose was found only in patients who died. However, HVF measurements on biopsies from three survivors taken later than 10 days after the overdose shows that survival is possible below this critical level.
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From 1968 to 1972 and in 1975 (provisional results) urine samples collected on three days per year were examined by photometer for N-acetyl-p-aminophenol (=NAPAP, main metabolite of phenacetin) and for salicylates in the same population. It consists of 1200 women born from 1918 to 1937 whose majority works in 80 enterprises of Northwestern Switzerland. In 1968 half of the women showed regular intake of phenacetin containing analgesics (=study group) in contrast to the other half that did not (=control group). ⋯ Possible reasons for the decreasing tendency of analgesics intake are mentioned. The much more frequent excretion of salicylates in the study group in contrast to the controls is probably due to the intake of combined analgesics. The provisional results of 1975 are in accordance to those observed previously.