3. Nonpharmacologic interventions should be used whenever possible.
The wider adoption of nonpharmacologic interventions in clinical practice has been greatly limited by the heterogeneity in study protocols, including in selection of participants, in the types of dementias included, and in defining and applying the intervention strategies. Nevertheless, there is general consensus that individualized behavioral strategies that build on the patients’ interests and preserved abilities are more effective, at least in the short term. Patients best suited for these interventions are those with less cognitive decline, better communication skills, less impairment in activities of daily living, and higher responsiveness. A systematic review of systematic reviews found music therapy to be the most effective intervention for reducing agitation and aggression in dementia, along with behavioral management techniques when supervised by healthcare professionals. On the other hand, physical restraints are best avoided, as their use in hospitalized patients has been associated with longer stays, higher costs, lower odds of being discharged to home, and in long-term care patients with longer stays, with increased risk for medical complications and functional decline.
4. Antidepressants are not all equally safe or efficacious in managing agitation.
In a network meta-analysis that looked at the effects of several antidepressants on agitation in dementia, citalopram had just under 95% probability of efficacy and was the only antidepressant that was significantly more efficacious than placebo. In the multicenter CitAD trial, citalopram was efficacious and well tolerated for the treatment of agitation in AD, but the mean dose of citalopram used, 30 mg/d, was higher than the maximum dose of 20 mg/d recommended by the US Food and Drug Administration (FDA) in those aged 60 years or above. The optimal candidates for citalopram were those under the age of 85 with mild to moderate AD and mild to moderate nonpsychotic agitation, and it took up to 9 weeks for it to be fully effective. Due to the risk for dose-dependent QTc prolongation with citalopram, a baseline ECG must be done, and a second ECG is recommended if a clinical decision is made to exceed the recommended maximum daily dose. In the CitAD trial, 66% of patients in the citalopram arm received cholinesterase inhibitors concurrently while 44% received memantine, so these symptomatic treatments for AD should not be stopped solely for initiating a citalopram trial.
The antiagitation effect of citalopram may well be a class effect of all selective serotonin reuptake inhibitors (SSRIs), given that there is also evidence favoring the use of sertraline and escitalopram. The S-CitAD trial, the first large, randomized controlled study of escitalopram for the treatment of agitation in dementia, is expected to announce its top-line results sometime this year. However, not all antidepressant classes appear to be equally efficacious or safe. In the large, 12-week randomized placebo-controlled trial SYMBAD, mirtazapine was not only ineffective in treating nonpsychotic agitation in AD but was also associated with a higher mortality rate that just missed statistical significance. Trazodone is also often used for treating agitation, but there is insufficient evidence regarding efficacy and a high probability of adverse effects, even at low doses.
5. Antipsychotics may be effective drugs for treating severe dementia-related agitation.
The CATIE-AD study found that the small beneficial effects of antipsychotics for treating agitation and psychosis in AD were offset by their adverse effects and high discontinuation rates, and the FDA-imposed boxed warnings in 2005 and 2008 cautioned against the use of both first- and second-generation antipsychotics to manage dementia-related psychosis owing to an increased risk for death. Subsequently, the quest for safer and more effective alternatives culminated in the FDA approval of brexpiprazole in 2023 for the treatment of agitation in AD, but the black box warning was left in place. Three randomized controlled trials found brexpiprazole to be relatively safe, with statistically significant improvement in agitation. It was especially efficacious for severe agitation, but there is controversy about whether such improvement is clinically meaningful and whether brexpiprazole is truly superior to other antipsychotics for treating dementia-related agitation. As in the previously mentioned citalopram studies, most patients in the brexpiprazole studies received the drug as an add-on to memantine and/or a cholinesterase inhibitor, and it was proven effective over a period of up to 12 weeks across the three trials. Regarding other antipsychotics, aripiprazole and risperidone have been shown to be effective in treating agitation in patients with mixed dementia, but risperidone has also been associated with the highest risk for strokes (about 80% probability). Unfortunately, an unintended consequence of the boxed warnings on antipsychotics has been an increase in off-label substitution of psychotropic drugs with unproven efficacy and a questionable safety profile, such as valproic acid preparations, that have been linked to an increased short-term risk for accelerated brain volume loss and rapid cognitive decline, as well as a higher risk for mortality.
Lisa M. Wise, assistant professor, Psychiatry, at Oregon Health & Science University, and staff psychiatrist, Department of Psychiatry, Portland VA Medical Center, Portland, Oregon, and Vimal M. Aga, adjunct assistant professor, Department of Neurology, Oregon Health & Science University, and geriatric psychiatrist, Layton Aging and Alzheimer’s Disease Center, Portland, Oregon, have disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.