Combined simultaneous arginine clonidine stimulation test: Timing of peak growth hormone (GH) concentration and correlation with clinical indices of GH status

If the combined simultaneous arginine clonidine test were shortened to 120 min, 5.2% of normal responders would be missed. Although this test has not been compared to any “gold standard” GH stimulation test, the outcome of this test does correlate weakly with clinical indices of GH status and spares patients the inconvenience of sequential testing.