Agitation in Dementia

The purpose of this research study is to test if adding one infusion of mesenchymal stem cells to the current treatment with antipsychotic medication may help control behavioral problems in people with a diagnosis of moderate to severe Alzheimer's disease.

This study tests a medication called dronabinol in people with Alzheimer's disease. First, participants go through up to 4 weeks of screening. Then, over 2 weeks, the dose of the study drug is slowly increased. For the next 10 weeks, participants stay on either dronabinol or a placebo. After finishing this part of the study, participants can join a 6-month extension where everyone receives dronabinol. Those already on the drug stay on their same dose, while those who were on placebo gradually increase their dose over 2 weeks. All participants take dronabinol for the rest of the extension, then complete a final safety check 4 weeks after stopping the medication. Usual medical treatments are continued throughout the study.