(Reuters) – The U.S. Food and Drug Administration on Friday approved Eisai Co Ltd and Biogen Inc’s Alzheimer’s drug lecanemab for the treatment of early forms of the fatal, brain-wasting disease. Like their earlier Alzheimer’s drug Aduhelm, lecanemab, to be sold under the brand name Leqembi, belongs to a class of treatments that aim to slow disease progression by removing sticky clumps of the toxic protein beta amyloid from the brain. Here’s what we know about access to the drug so far: PATIENT POPULATION Leqembi was approved for patients with Alzheimer’s disease, and is recommended for use in…