An extract from:
http://www.breggin.com/paxilproductliability.html
" (5) SSRI-induced akathisia, an internal sensation of agitation or discomfort that drives a person to move about, and also to lose impulse control. During akathisia, the inner experience of agitation includes many unusual physical feelings, such as electricity in the head or body. The person suffering from akathisia typically feels compelled to move the feet when sitting, to stand, or to pace. Akathisia is known to increase the risk of suicide and violence."
http://www.salon.com/health/feature/1999/07/19/zoloft/index1.html
"Akathisia is like being tortured from within," says Peter Breggin, a Maryland psychiatrist and prominent critic of Prozac and other psychiatric medications. "It's like the screeching of chalk down a board, only it's going down your spinal column.
"This agitation or akathisia drives a person into extreme states of irritability, anger, and frustration," Breggin continues. "People can become more depressed and more despairing; their impulse control loosens and they do stupid things. So the violent impulses that an ordinary person would control come pouring out or even appear for the first time.".....
In his article, Pfizer's researcher Lane described the suicide risk of SSRIs -- selective serotonin reuptake inhibitors, the class of drug to which Prozac and Zoloft belong -- in this way: "It may be less of a question of patients experiencing ... suicidal ideation, than patients feeling that 'death is a welcome result' when the acutely discomforting symptoms of akathisia are experienced on top of already distressing disorders."