Table 2.

Frequency and Intensity of Side Effects at Day 1, 6, and 13 of Methylphenidate Treatment

	Mild, n (%)			Significant, n (%)			Total, n (%)
Side effect category	Day 1	Day 6	Day 13	Day 1	Day 6	Day 13	Day 1	Day 6	Day 13
Gastro-intestinal	5 (55.56)	11 (84.62)	6 (54.55)	0	0	0	5 (55.56)	11 (84.62)	6 (54.55)
Sleep disturbances	3 (3.33)	5 (38.46)	7 (63.64)	2 (22.22)	2 (15.38)	2 (18.18)	5 (55.56)	7 (53.85)	9 (81.82)
Neurologic	0	0	2 (18.18)	0	0	0	0	0	2 (18.18)
Cardio-vascular	0	1 (7.69)	0	0	0	0	0	1 (7.69)	0
Mood	0	0	1 (9.09)	0	0	1 (9.09)	0	0	2 (18.18)
Other psychiatric	0	0	1 (9.09)	2 (22.22)	2 (15.38)	0	2 (22.22)	2 (15.38)	1 (9.09)
Other	0	0	0	1 (11.11)	0	0	1 (11.11)	0	0