“…Although it was postulated by Baldessarini, Tondo and Hennen (2001) that the reduction of the suicide risk by lithium prophylaxis is primarily caused by its depression-preventive effect, our hypothesis from the beginning has been that lithium differs from other mood stabilizers and also from most antidepressants by its very marked serotonin-agonistic effects which are related predominantly to its pre-synaptic functions (Müller-Oerlinghausen, 1985, 1997. It Impact of Lithium on Suicidal Behavior appears at least an attractive speculation that this serotoninergic action, possibly in connection with other effects, is related to its very well established anti-aggressive effects in animals as well as humans (Nilsson, 1993), but also to its antisuicidal effects.…”