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Table 2 Clinical complications and side effects were reported as number per group.

From: Zinc sulfate as an adjunct to methylphenidate for the treatment of attention deficit hyperactivity disorder in children: A double blind and randomized trial [ISRCTN64132371]

Side Effects Zinc sulfate Placebo P
Anxiety 3 3 Ns
Decreased Appetite 8 7 Ns
Difficulty Falling Sleep 6 6 Ns
Abdominal Pain 8 4 0.31
Nausea 9 3 0.08
Headache 9 9 Ns
Metallic taste 13 0 0.0001