“…Fifty percent of individuals experienced nausea, and 17% experienced lowered energy, gas, diarrhea or pain, insomnia, tremor, muscular tension or teeth grinding". Varley & McClellan (as cited in Purdie, Hattie & Carroll, 2002) reported that some people even died of the pharmacological treatment of ADHD. There are also other negative effects on weight, appetite, blood pressure, heart rate, and sleep patterns, and so on (Purdie, Hattie & Carroll, 2002).…”