Pharmacology A.N.S. fe819a6b Which drug is not used now in Alzheimer's disease? A Tacrine B Galantamine C Donepezil D Rivastigmine High-Yield Explanation Ans. (A) Tacrine(Ref: KDT 8th/e p119, 518)Because of hepatotoxicity, and requirement of frequent dosing, tacrine is less often used than other agents.