In the realm of dementia treatment aroma therapy has received great interest. In a population of patients not served by many mainstream drugs with great efficacy, complementary therapies are among few other options. The perceived low side effect profile of aromatherapy is also attractive to practitioners and family of patients with reduced verbal communication. As such it has been tried for many symptoms of dementia; to reduce disturbed behaviour (e.g. Brooker 1997), promote sleep (e.g. Wolfe 1996), and stimulate motivational behaviour (e.g. MacMahon 1998). Amongst the most distressing facets of dementia are the 'Behavioural and psychological symptoms in dementia' (BPSD). This manifestation of dementia often stresses the relationships between the patient, carers and family. This area has received particular interest in the larger aroma therapy trials.