Family caregivers of a community-dwelling demented relative experience significant burden in their caregiving role. In particular, behavioural disturbances are expected to be responsible for high caregiver distress and burden. Above, in approximately 80% of the cases, institutionalization of the demented patients with dementia occurs as a result of a burdened caregiver. Because of the impressive disruptive character of behavioural disturbances, most caregivers appeal for pharmacological intervention at a given moment, expecting instant suppression of the aberrant behaviour. Beside the antipsychotic drugs, the cholinesterase inhibitors are commonly used in the treatment of agitation, aggression, delusions, etc. Although in meta-analyses on the efficacy of both categories of drugs, only little evidence of their efficacy has been found and an important placebo effect has been reported that >90% of the demented elderly was treated at least once. The aim of this study was to investigate if pharmacological treatment of behavioural disturbances of the demented can lower the burden and the time spent in the family caregiver irrespective of their effect on the demented himself. A systematic literature search was performed by means of Medline, Embase, Cochrane DSR, Dare, CCTR and ACP Journal Club. Based on this review, pharmacological treatment of demented elderly seems to lower caregiver burden (mean difference 0.27) and the time caregivers spent (mean difference 41.65 minutes). Considering that family caregivers confronted with the troublesome behaviour of their demented relative will apply for pharmacological intervention, future research should particularly focus on the outcome measures of the caregivers' well-being.