Eliminationen foregår renalt ved udskillelse af metabolitter, heraf 89% som sulfat - og glukoronidkonjugater af 6- hydroxymelatonin og 2% som melatonin (uomdannet stof).
Elimination is by renal excretion of metabolites, 89% as sulphated and glucoronide conjugates of 6-hydroxymelatonin and 2% is excreted as melatonin (unchanged drug).