ከመጨረሻው መጠን በኋላ methyltestosterone እና ንጥረ ነገሮች ከሟሟቸው በፊት ለአንድ ሳምንት ያህል ሰውነት ውስጥ ይቆያሉ.
Demerol and its metabolites are typically still present in the body for about a week after the last administration of the drug.