Abstract
Ro 03-8799, a lipophilic nitroimidazole with a basic side chain, has now been administered intravenously to 69 patients. The elimination half-life in plasma was 5.1 hr and the plasma concentration at 30 min was 14.8 μg/ml standardized to a dose of 1 g per square meter of surface area. Immediate symptoms of malaise, heat, sweating and disorientation limit the amount of the drug which may be given on any one occasion. However, a dose of 750 mg per square meter of surface area may be given combined with daily radiotherapy. Our data suggest that when given with a 20 fraction course of radiotherapy, sensitization of hypoxic cells may be achieved equal to a 10-fold increase in the dose of misonidazole above that presently permitted.
Published Version
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