Figure 2.
Plasma mean (± SEM) concentrations of (top) L-threo-3,4-dihydroxyphenylserine (L-DOPS) and (bottom) norepinephrine (NE) as functions of time after oral administration of L-DOPS (400 mg) with 200 mg of placebo (PLA, open circles), 200 mg of carbidopa (CAR, black circles), or 200 mg of entacapone (ENT, black squares).