“…These side effects were well tolerated, and Chacko et al concluded that with proper precaution and monitoring, lithium can be safely administered to these patients. However, it should be noted that lithium prophylaxis in this age group perhaps requires a more cautious approach, as well as more frequent evaluation and monitoring due to greater risk of adverse effects and intoxication in older adults [DasGupta and Jefferson, 1990;Lepkifker et al, 1985;Spar et al, 1979]. One has to be aware of factors such as the decline in the glomerular filtration rate, the existence of medical or neurological illness, greater sensitivity to the drug, increased likelihood of adverse drug interactions in view of the frequent use of multiple medications by older adult patients, irregular or inadequate fluid and food intake, poor compliance, and potentially limited family and social support [de Angelis, 1990;Sproule et al, 2000].…”