A single oral dose of tablets or capsules of 239 mumol nimodipine was given to 8 healthy volunteers of Han nationality in a randomized crossover study. Plasma levels were determined with HPLC method. The plasma concentration-time curve fitted to a first order absorption, 1-compartment open model, and the T1/2K was around 2 h. Although the capsules could reach peak level faster, the bioavailability was not significantly different from that of the tablets.