Hi, this is my first post. My husband has been diagnosed with Alzheimer's . He has been taking Donepezil for over a year with no real side effects. However because his speech is deteriorating his Consultant prescribed Memantane to take with the Donepezil. But within 2 weeks he has started having really bad symptoms of severe headaches, sleepiness, confusion, frequent bowel movements, depression etc. has anyone else had experience of this drug? I would be very grateful for any views or advice. Thanks. Diannie