Amongst the terpenoids, monoterpenoids are the most promising because the inhibition of AChE has been shown to remedy AD by inhibiting amyloid-beta-induced neurotoxicity and also clearing it, tau-protein phosphorylation, and oxidative stress by boosting antioxidant defenses, neuroinflammation, restoration of mitochondrial function, initiation of processes with simultaneous inhibition of pro-apoptotic genes and proteins [123]. The gene discussed is MAPT; the disease is Alzheimer disease.