<prompt> All are chlolinergic agents exceptGalantamineDonepezilTacrineMemantine  <response>: Donepezil,rivastigmine,gallantamine and tacrine are cholinergic due to inhibition of cholinesterase enzyme drugs useful for alzheimers disease. Memantine is an NMDA blocker,used for Alzheimers disease. Ref-KDT 63 p472,473 