Palatability and Swallowability of Pimavanserin When Mixed with Selected Food Vehicles: An Exploratory Open-Label Crossover Study

Dysphagia (difficulty swallowing) affects up to 13% of persons 65 years and older and 51% of older persons in nursing homes and can contribute to reduced adherence to oral medications. This was an exploratory, single-center, open-label, randomized, crossover study in healthy older adult participants. Primary objectives were evaluation of palatability (taste) and swallowability of the contents of pimavanserin 34 mg capsules mixed with selected soft foods or a liquid nutritional supplement. Secondary objectives included evaluation of additional palatability endpoints and ease of capsule manipulation for mixing. A total of 18 healthy, older adult participants (mean age 65 years) were included. Mean participant ratings for all food vehicles were “moderately like” to “neither like nor dislike” for palatability and “very easy” to “somewhat easy” for swallowability. Capsule manipulation to allow sprinkling of contents was rated “very easy” or “somewhat easy” by most participants. There were five treatment-emergent adverse events, all mild; two were deemed related to study treatment. The palatability and swallowability of pimavanserin was considered acceptable when administered with certain soft foods or a liquid nutritional supplement by the study participants.