Halveringstiden ved elimintaion (t½) er 0, 6– 1, 3 timer for levodopa, 2– 3 timer for carbidopa og 0, 4– 0, 7 timer for entakapon, når de er indtaget hver for sig.
The elimination-half life is (t1/ 2) is 0.6-1.3 hours for levodopa, 2-3 hours for carbidopa and 0.4-0.7 hours for entacapone, each given separately.