A neurodegenerative disorder refers to a huge range of condition that mainly affect the neurons of the brain in the animal or human body. Neurons are not capable of regenerating themselves like the normal cells. As a result, a damage in a neurons cannot be repaired, rather its starts to degenerate gradually and at last the nerve cells or the neurons are completely destroyed. The neurodegenerative disorders are mainly associated with the dementia problem among the patients of neurodegenerative disorders. The most common neurodegenerative disorders are Alzheimer’s disease (AD), Parkinson’s Disease (PD), Spinal muscular atrophy (SMA), Motor neuron disease (MND) (JPND, 2019). In this essay, the Alzheimer’s disease, its pathophysiology is highlighted. The drugs that can be used to treat the disease condition is also discussed. However, AD cannot be cured but the process of gradual degeneration of the neurons can be prevented by using specific drugs. There are a few drugs that can be used to slow down the process of neural degeneration. The most common drugs are donepezil that is an inhibitor of Acetyl cholinesterase, memantine that is the antagonist of NMDA receptor, galantamine can be used as drug in treatment of AD. In this essay, the mechanism of galantamine is highlighted. Firstly, the effectiveness on an animal model is discussed and then the usefulness of the drug on the human body is also described in the later part of this essay.