Sedative-Anxiolytic Effects on Simulated Driving Performance

2mg alprazolam administered at night, placebo administered in the morning.

1mg alprazolam administered at night, placebo administered in the morning.

0.5mg alprazolam administered at night, placebo administered in the morning.

10mg alprazolam administered at night, placebo administered in the morning.

Placebo administered at night, placebo administered in the morning.

Placebo administered at night, 1mg alprazolam administered in the morning.