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ACTH and cortisol measurement
| Diurnal change | Overnight dexamethasone suppression test | Human corticotropin-releasing hormone (CRH) test | ||||||
|---|---|---|---|---|---|---|---|---|
| Time of day (h) | Dose | Time (min) | ||||||
| 8:00 | 23:00 | 1 mg | 8 mg | 0 | 30 | 60 | 90 | |
| ACTH (pg/ml) | 293 | 307 | 307 | 258 | 270 | 321 | 310 | |
| Cortisol (μg/dl) | 24.6 | 36.2 | 35.8 | 29.0 | 26.2 | 30.9 | 30.2 | |
