Kun en lille fraktion (< 5%) af radioaktiviteten i urinen (repræsenterende < 3% af den totale dosis) består af det oprindelige stof; derfor spiller den renale ekskretion en mindre rolle i eliminiationen af det oprindelige stof.
Only a small fraction (< 5%) of the radioactivity in urine (representing < 3% of the total dose) was made up of parent compound; therefore, renal excretion plays a minor role in elimination of the parent compound.