<prompt> All are cholinergic agents except IGalantamineDonepezilTacrineMemantine  <response>: Refer kDT 6e p 472,473 Donepazil, rivastigmine, gallantamine and tacrine are cholinergic drugs due to inhibition of cholenesterase enzymeuseful for Alzheimers disease Memantine is an NMDA blocker, used for Alzheimers disease 