Fitful sleep not necessarily a sign of Alzheimer’s disease

Dear Doctor: My husband has fallen into a strange sleep pattern. Some nights he’s awake until 3 a.m., tosses and turns all night, then wakes up tired. I’ve read that strange sleep cycles may be linked to Alzheimer’s disease, which his mother had. I’m worried, but what can I do?

Dear Reader: First, a bit of reassurance. More than half of older adults report having problems with sleep, including diff…