These results suggest that paracetamol co-administration at a dosage of 2000-2500 mg/day for 3 days has no clinically relevant effects on the anticoagulant effects of phenprocoumon.

The lymphatic clearance of the human skin at the instep of the foot was measured in 20 healthy volunteers (mean age ± SD 33.8 ± 10.5 years). Ten microliters of fluorescein isothiocyanate-dextran 150,000 were injected intradermally and the fluorescent light intensity of the deposit was measured 10 min and 24 h after injection by window densitometry. Fluorescent light intensity decreased by 31.2 ± 13.5 arbitrary units (p < 0.0001) or by a factor of 4.1 ± 3.9. Reproducibility was tested 2–6 weeks later in 7 subjects and an intraclass reliability of 0.76 was found. These are the first measurements of the lymphatic clearance of the human skin using a fluorescent tracer. The method is easier and safer than the isotope clearance technique and small areas of the human skin can be investigated. The data found form a basis with which to compare measurements made in patients with different forms of edema.

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