Environmental factors affecting paracetamol metabolism in London factory and office workers.

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Abstract
A Paracetamol elimination was measured, using serial saliva samples, in 114 London factory and office workers, 76 Whites and 38 Asian immigrants. 2. Use of social drugs such as alcohol, tobacco and the oral contraceptive varied considerably within the sample, being appreciably greater in White subjects. 3. Paracetamol clearance was 21% slower in Asians than in Whites and half‐life 18% longer. The total range of clearance was 1.86–6.78 ml min‐1 kg‐1. 4. Clearance was slower in women than in men, increased with increasing alcohol intake and cigarett consumption, and was more rapid in those women using the oral contraceptive. The effects of alcohol and the oral contraceptive were also found in White subjects alone. 5 The variables found to correlate independently with paracetamol clearance accounted for only 27% of the total sample variance, however, and are unlikely to be the major determinants of paracetamol elimination in man.

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