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Autonomic variables
| At baseline | At 2 hr | Pairedt | p (two-tailed) | ||
|---|---|---|---|---|---|
| Systolic blood pressure mm/Hg (SD) | Placebo | 108.4 (11.7) | 107.5 (14.8) | 0.42 | 0.68 |
| Amphetamine | 103.4 (14.2) | 114.4 (16.3) | 2.00 | 0.09 | |
| Pulse (rate/min) (SD) | Placebo | 70 (13) | 67 (7) | 1.00 | 0.35 |
| Amphetamine | 66 (5) | 68 (11) | 0.57 | 0.60 |
