Eliminationen var absorptionshastighedsbegrænset (flip- flop - kinetik), hvilket forklarer den længere t½ efter depotplaster (3, 4 timer) mod oral eller intravenøs indgift (1, 4 til 1, 7 time).
Elimination was absorption rate limited (flip-flop kinetics), which explains the longer t½ after transdermal patch (3.4 h) versus oral or intravenous administrations (1.4 to 1.7 h).