Without insurance Leqembi costs $26,500 on average. For patients on Kisunla, the total cost to a patient depends on how long they stay on it — as little as $12,522 for six months, or as much as $48,896 for a year and a half without insurance. Participants in a clinical trial may receive access to Kisunla and Leqembi free of charge. These figures represent the drug alone, total out-of-pocket costs may include additional expenses like MRI monitoring and PET scans which can be very expensive.