 Capillita can cause serious side effects. Call your doctor about sudden mood changes, behaviors, or suicidal thoughts right away. Antidepressants may increase these risks in young adults. Elderly dementia patients have increased risk of death or stroke. Capillita is not approved for dementia-related psychosis. Report fever, confusion, or stiff muscles, which may be life-threatening, or uncontrolled muscle movements, which may be permanent. Common side effects include sleepiness, dizziness, nausea, and dry mouth. These aren't all the side effects.