Table 2. Study drug schedule.

Ketamine 1	Tolerability	Ketamine 2	Tolerability	Ketamine 3
0.75 mg/kg	Well tolerated	0.9 mg/kg	Well tolerated	0.9 mg/kg
			Moderately tolerated	0.9 mg/kg
			Poorly tolerated	0.75 mg/kg
	Moderately tolerated	0.75 mg/kg	Well tolerated	0.75 mg/kg
			Moderately tolerated	0.75 mg/kg
			Poorly tolerated	0.6 mg/kg
	Poorly tolerated	0.6 mg/kg	Well tolerated	0.6 mg/kg
			Moderately tolerated	0.6 mg/kg
			Poorly tolerated	0.5 mg/kg