Appetite Stimulants for Elderly Patients with Complex Medical History

Introduction to Appetite Stimulants

The American Geriatrics Society recommends that appetite stimulants should only be used in elderly patients with dementia and appetite loss if concurrent depression is present, with mirtazapine being the only appropriate option, according to the Praxis Medical Insights guidelines 1, 2

The evidence shows no consistent benefit for appetite stimulants in dementia patients, and potentially harmful side effects outweigh the uncertain benefits for appetite and body weight, with 89% consensus agreement among clinical nutrition guidelines, as reported by Gastroenterology 3, 1
Three small placebo-controlled trials in dementia patients found no significant effect of cannabinoids on body weight, BMI, or energy intake, according to Gastroenterology 3

Mirtazapine is the only pharmacological appetite stimulant appropriate for dementia patients, and only when concurrent depression exists, with a recommended starting dose of 7.5 mg at bedtime, according to Praxis Medical Insights 1, 2
The maximum dose of mirtazapine is 30 mg at bedtime, and a full therapeutic trial should be allowed for 4-8 weeks to assess efficacy, as recommended by Praxis Medical Insights 1, 2

One small retrospective study in 22 dementia patients showed a mean weight gain of 1.9 kg at 3 months and 2.1 kg at 6 months, with approximately 80% of patients experiencing some weight gain, according to Gastroenterology and Praxis Medical Insights 3, 1, 2

The Praxis Medical Insights guidelines recommend prioritizing non-pharmacological interventions before considering any pharmacological appetite stimulants, including social dining strategies, nutritional optimization, oral care, and medication review 1, 4, 2
Social dining strategies, such as placing patients at dining tables with others, can significantly improve intake and quality of life, according to Praxis Medical Insights 4, 2
Nutritional optimization, including providing oral nutritional supplements and offering energy-dense meals, can help improve dietary intake, as recommended by Praxis Medical Insights 1, 2

Regular reassessment at weeks 1, 2, 4, 8, and 12 is essential to evaluate benefit versus harm, according to Praxis Medical Insights 1, 4
Screening for malnutrition using validated tools, such as the NRS-2002, MNA, or MUST, is recommended, according to Praxis Medical Insights 1