 There's a new Alzheimer's drug. The Food and Drug Administration approved a second Alzheimer's drug. It's made by Eli Lilly and is called Kesunla and is for mild or early cases of dementia caused by Alzheimer's. Kesunla is only the second drug that's been convincingly shown to delay cognitive decline in patients. Last year, a similar drug from Japanese drug maker Azai was approved. Doctors who treat Alzheimer's say approval is an important step after decades of failed experimental treatments.