Overall, it appears that ~ 10 % and 16 % of the administered dose of naloxegol showed up as unchanged
drug in urine and feces based on radiochromatographic analyses used in this metabolite profiling study of samples
from the mass balance study. ~ 44 % of dose appeared in feces as metabolites; it may be likely that the absorption
of naloxegol or NKTR-118 following oral administration may be more than what has been assumed based on
unchanged drug in urine alone. However, it cannot be ruled out that metabolites noted in feces were formed from
local degradation within the GI tract without systemic absorption of naloxegol.